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    Error Restoring GPT Partition Tables

    Scheduled Pinned Locked Moved Unsolved
    FOG Problems
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    • T
      tlehrian @Sebastian Roth
      last edited by

      @Sebastian-Roth Perfect. Thanks for the quick reply. Will do that.

      1 Reply Last reply Reply Quote 0
      • T
        tlehrian @Sebastian Roth
        last edited by tlehrian

        @Sebastian-Roth Still throwing the same error (original error…restoring the GPT partition tables, not the kernel panic).

        FYI the image is set up as a Multiple partition image - all disks (Not resizeable). The computer contains two M.2 drives: 1 512GB with several partitions for boot/OS (dual boot Linux/Windows), and another 256GB with two paritions (one ext4 and another ntfs). The OS on the image is set to Linux-50.

        1 Reply Last reply Reply Quote 0
        • T
          tlehrian @Sebastian Roth
          last edited by

          @Sebastian-Roth The interesting thing is, the process seems to work every once in a while. I’m suspecting maybe the drives are being switched around and the process is trying to use the 256GB drive as the primary OS drive, when it won’t be large enough. Is there some sort of random or race condition that might cause that? I see an option in the host setup for “Host Primary Disk” - would that alleviate this issue?

          Q george1421G 2 Replies Last reply Reply Quote 0
          • Q
            Quazz Moderator @tlehrian
            last edited by

            @tlehrian I believe this is a known problem that can occur when you have multiple NVME drives on a UEFI system as the numeration can change on reboot afaik.

            T 1 Reply Last reply Reply Quote 0
            • T
              tlehrian @Quazz
              last edited by

              @Quazz Do you know of any solution to the issue?

              Q 1 Reply Last reply Reply Quote 0
              • Q
                Quazz Moderator @tlehrian
                last edited by

                @tlehrian I don’t believe there’s a solution currently, just some thoughts on how to potentionally address it, but without access to relevant hardware there is no way to confirm which direction we have to take.

                Related thread: https://forums.fogproject.org/topic/13163/laptop-with-2-nvme-drives-randomly-selected-so-selecting-one-drive-to-capture-not-working

                T 1 Reply Last reply Reply Quote 0
                • T
                  tlehrian @Quazz
                  last edited by

                  @Quazz Hmmmm… very interesting. I guess I’m OK that it seems to be a random thing. I can keeping booting until it finally, randomly, picks the right drive to be the primary. At least it doesn’t seem to be a larger HW issue. I’ll be looking for a solution to this issue if one does eventually pop up. Thanks for the quick reply.

                  1 Reply Last reply Reply Quote 0
                  • george1421G
                    george1421 Moderator @tlehrian
                    last edited by

                    @tlehrian said in Error Restoring GPT Partition Tables:

                    I’m suspecting maybe the drives are being switched around and the process is trying to use the 256GB drive as the primary OS drive, when it won’t be large enough.

                    Yes this is an issue we are tracking in the link Quazz provided. We are looking for someone with a little linux skills and a system with 2 nvme drives to help us debug. Are you that person?

                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                    T 1 Reply Last reply Reply Quote 0
                    • T
                      tlehrian @george1421
                      last edited by

                      @george1421 Possibly. Unfortunately I have a small window of opportunity here where I could help test before we need to have all of our systems with two M2 drives up and running for our Fall semester (starting Aug 27). At that point, I’d no longer have any systems to play with.

                      george1421G 1 Reply Last reply Reply Quote 0
                      • george1421G
                        george1421 Moderator @tlehrian
                        last edited by

                        @tlehrian I’m hoping that with a short time of debugging (just less than an hour of on and off testing) will help us (hopefully) find a solution.

                        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                        T 1 Reply Last reply Reply Quote 0
                        • T
                          tlehrian @george1421
                          last edited by

                          @george1421 Sure, I’d be happy to help where I can. After reading through the thread @Quazz shared, I guess I’m lucky that we’re trying to use the large NVME drive as our OS drive…

                          george1421G 1 Reply Last reply Reply Quote 0
                          • george1421G
                            george1421 Moderator @tlehrian
                            last edited by george1421

                            @tlehrian Ok here is what we are seeing. When FOS Linux boots, the nvme drives initialize (become ready to the os) at different times. Sometimes drive A is ready first and other times drive B is ready first. Well when linux boots what ever drive inits first becomes /dev/nvme01 and the second one becomes /dev/nvme02. This is not an issue with FOG or linux, its an issue between the linux OS and the hardware.

                            So what we need is to run a utility with a few commands to help us detect which drive is which in each state. The switch is totally at random so we can’t predict the order using linux. So what I need you (as a tester) to do is to pxe boot the target computer multiple times to record the settings when the drives are in a normal and then reversed order. If we are lucky you will see this swap within 10 pxe boots.

                            Here is what I want you to do:

                            1. Download this updated init from here: https://fogproject.org/inits/init_nvme-cli.xz
                            2. Rename the original inits in `/var/www/html/fog/service/ipxe init.xz to init.xz.sav
                            3. Move the downloaded file to that directory and save as init.xz
                            4. Pick one of these dual drive nvme computers and schedule a deploy task to it. But before you hit the schedule task button tick the debug checkbox then schedule the task.
                            5. PXE boot the target computer. After a few screens of text where you need to press enter to clear you will be dropped to the FOS Linux command prompt.
                            6. At the FOS Linux command prompt run this command lsblk to note the size and order of the nvme disk. Use disk size to be your guide in determining the order. So this is state 1.
                              6.1 You can use these steps if you want to setup remote debugging. Its easier to do the copy and paste of commands from putty. You don’t need to, its just one option.
                              6.2 At the FOS Linux command prompt key in ip addr show and collect the IP address of the FOS Linux computer.
                              6.3 Give root a password with passwd. Just give it a simple password like hello. The password will be reset on the next reboot. So don’t worry.
                              6.4 From a windows computer use putty to ssh into the FOS Linux computer. Login as root and the password you created in step 6.3
                            7. At the FOS Linux command prompt key in the following and post the results here nvme list. If the nvme command isn’t known then the downloaded inits are not in the right spot.
                            8. Key in the following command and post the result(s) here nvme id-ctrl /dev/nvme0n1 -H and (I’m guessing at the name since I don’t have a dual nvme system, use the name from the lsblk command above) nvme id-ctrl /dev/nvme0n2 -H
                            9. Now reboot the FOS Linux computer with ctrl-alt-del or key in reboot at the FOS Linux command prompt. The system should PXE boot right back into FOS Linux in debug mode.
                            10. Use the lsblk command to determine the disk order. We are looks for the order of the drives when they switch places. If you can’t get them to switch then power off the system instead of rebooting to see if we can get them to switch. The key is to capture the output of the nvme command in both states.

                            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                            T 3 Replies Last reply Reply Quote 1
                            • T
                              tlehrian @george1421
                              last edited by

                              @george1421 Ok. I should have a chance to do this later today. I’m hopeful this leads to a fix for the issue.

                              1 Reply Last reply Reply Quote 1
                              • T
                                tlehrian @george1421
                                last edited by

                                @george1421 Here is the information from State 1:

                                State 1:
                                > nvme list
                                
                                Node             SN                   Model                                    Namespace Usage                      Format           FW Rev
                                ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
                                /dev/nvme0n1     S499NX0M113634       SAMSUNG MZVLB256HAHQ-000H2               1           2.95  GB / 256.06  GB    512   B +  0 B   EXD71HAQ
                                /dev/nvme1n1     S498NA0M403426       SAMSUNG MZVLB512HAJQ-000H2               1         149.49  GB / 512.11  GB    512   B +  0 B   EXA71HAQ
                                
                                
                                > nvme id-ctrl /dev/nvme0n1 -H
                                
                                NVME Identify Controller:
                                vid     : 0x144d
                                ssvid   : 0x144d
                                sn      : S499NX0M113634
                                mn      : SAMSUNG MZVLB256HAHQ-000H2
                                fr      : EXD71HAQ
                                rab     : 2
                                ieee    : 002538
                                cmic    : 0
                                  [2:2] : 0     PCI
                                  [1:1] : 0     Single Controller
                                  [0:0] : 0     Single Port
                                
                                mdts    : 9
                                cntlid  : 4
                                ver     : 10200
                                rtd3r   : 186a0
                                rtd3e   : 7a1200
                                oaes    : 0
                                  [8:8] : 0     Namespace Attribute Changed Event Not Supported
                                
                                oacs    : 0x17
                                 [15:4] : 0x1   Reserved
                                  [3:3] : 0     NS Management and Attachment Not Supported
                                  [2:2] : 0x1   FW Commit and Download Supported
                                  [1:1] : 0x1   Format NVM Supported
                                  [0:0] : 0x1   Sec. Send and Receive Supported
                                
                                acl     : 7
                                aerl    : 7
                                frmw    : 0x16
                                  [4:4] : 0x1   Firmware Activate Without Reset Supported
                                  [3:1] : 0x3   Number of Firmware Slots
                                  [0:0] : 0     Firmware Slot 1 Read/Write
                                
                                lpa     : 0x3
                                  [1:1] : 0x1   Command Effects Log Page Supported
                                  [0:0] : 0x1   SMART/Health Log Page per NS Supported
                                
                                elpe    : 255
                                npss    : 4
                                avscc   : 0x1
                                  [0:0] : 0x1   Admin Vendor Specific Commands uses NVMe Format
                                
                                apsta   : 0x1
                                  [0:0] : 0x1   Autonomous Power State Transitions Supported
                                
                                wctemp  : 354
                                cctemp  : 355
                                mtfa    : 50
                                hmpre   : 0
                                hmmin   : 0
                                tnvmcap : 256060514304
                                unvmcap : 0
                                rpmbs   : 0
                                 [31:24]: 0     Access Size
                                 [23:16]: 0     Total Size
                                  [5:3] : 0     Authentication Method
                                  [2:0] : 0     Number of RPMB Units
                                
                                sqes    : 0x66
                                  [7:4] : 0x6   Max SQ Entry Size (64)
                                  [3:0] : 0x6   Min SQ Entry Size (64)
                                
                                cqes    : 0x44
                                  [7:4] : 0x4   Max CQ Entry Size (16)
                                  [3:0] : 0x4   Min CQ Entry Size (16)
                                
                                nn      : 1
                                oncs    : 0x1f
                                  [5:5] : 0     Reservations Not Supported
                                  [4:4] : 0x1   Save and Select Supported
                                  [3:3] : 0x1   Write Zeroes Supported
                                  [2:2] : 0x1   Data Set Management Supported
                                  [1:1] : 0x1   Write Uncorrectable Supported
                                  [0:0] : 0x1   Compare Supported
                                
                                fuses   : 0
                                  [0:0] : 0     Fused Compare and Write Not Supported
                                
                                fna     : 0
                                  [2:2] : 0     Crypto Erase Not Supported as part of Secure Erase
                                  [1:1] : 0     Crypto Erase Applies to Single Namespace(s)
                                  [0:0] : 0     Format Applies to Single Namespace(s)
                                
                                vwc     : 0x1
                                  [0:0] : 0x1   Volatile Write Cache Present
                                
                                awun    : 1023
                                awupf   : 0
                                nvscc   : 1
                                  [0:0] : 0x1   NVM Vendor Specific Commands uses NVMe Format
                                
                                acwu    : 0
                                sgls    : 0
                                  [0:0] : 0     Scatter-Gather Lists Not Supported
                                
                                subnqn  :
                                ps    0 : mp:7.02W operational enlat:0 exlat:0 rrt:0 rrl:0
                                          rwt:0 rwl:0 idle_power:- active_power:-
                                ps    1 : mp:6.30W operational enlat:0 exlat:0 rrt:1 rrl:1
                                          rwt:1 rwl:1 idle_power:- active_power:-
                                ps    2 : mp:3.50W operational enlat:0 exlat:0 rrt:2 rrl:2
                                          rwt:2 rwl:2 idle_power:- active_power:-
                                ps    3 : mp:0.0760W non-operational enlat:210 exlat:1200 rrt:3 rrl:3
                                          rwt:3 rwl:3 idle_power:- active_power:-
                                ps    4 : mp:0.0050W non-operational enlat:2000 exlat:8000 rrt:4 rrl:4
                                          rwt:4 rwl:4 idle_power:- active_power:-
                                
                                > nvme id-ctrl /dev/nvme1n1 -H
                                
                                NVME Identify Controller:
                                vid     : 0x144d
                                ssvid   : 0x144d
                                sn      : S498NA0M403426
                                mn      : SAMSUNG MZVLB512HAJQ-000H2
                                fr      : EXA71HAQ
                                rab     : 2
                                ieee    : 002538
                                cmic    : 0
                                  [2:2] : 0     PCI
                                  [1:1] : 0     Single Controller
                                  [0:0] : 0     Single Port
                                
                                mdts    : 9
                                cntlid  : 4
                                ver     : 10200
                                rtd3r   : 186a0
                                rtd3e   : 7a1200
                                oaes    : 0
                                  [8:8] : 0     Namespace Attribute Changed Event Not Supported
                                
                                oacs    : 0x17
                                 [15:4] : 0x1   Reserved
                                  [3:3] : 0     NS Management and Attachment Not Supported
                                  [2:2] : 0x1   FW Commit and Download Supported
                                  [1:1] : 0x1   Format NVM Supported
                                  [0:0] : 0x1   Sec. Send and Receive Supported
                                
                                acl     : 7
                                aerl    : 7
                                frmw    : 0x16
                                  [4:4] : 0x1   Firmware Activate Without Reset Supported
                                  [3:1] : 0x3   Number of Firmware Slots
                                  [0:0] : 0     Firmware Slot 1 Read/Write
                                
                                lpa     : 0x3
                                  [1:1] : 0x1   Command Effects Log Page Supported
                                  [0:0] : 0x1   SMART/Health Log Page per NS Supported
                                
                                elpe    : 255
                                npss    : 4
                                avscc   : 0x1
                                  [0:0] : 0x1   Admin Vendor Specific Commands uses NVMe Format
                                
                                apsta   : 0x1
                                  [0:0] : 0x1   Autonomous Power State Transitions Supported
                                
                                wctemp  : 354
                                cctemp  : 355
                                mtfa    : 50
                                hmpre   : 0
                                hmmin   : 0
                                tnvmcap : 512110190592
                                unvmcap : 0
                                rpmbs   : 0
                                 [31:24]: 0     Access Size
                                 [23:16]: 0     Total Size
                                  [5:3] : 0     Authentication Method
                                  [2:0] : 0     Number of RPMB Units
                                
                                sqes    : 0x66
                                  [7:4] : 0x6   Max SQ Entry Size (64)
                                  [3:0] : 0x6   Min SQ Entry Size (64)
                                
                                cqes    : 0x44
                                  [7:4] : 0x4   Max CQ Entry Size (16)
                                  [3:0] : 0x4   Min CQ Entry Size (16)
                                
                                nn      : 1
                                oncs    : 0x1f
                                  [5:5] : 0     Reservations Not Supported
                                  [4:4] : 0x1   Save and Select Supported
                                  [3:3] : 0x1   Write Zeroes Supported
                                  [2:2] : 0x1   Data Set Management Supported
                                  [1:1] : 0x1   Write Uncorrectable Supported
                                  [0:0] : 0x1   Compare Supported
                                
                                fuses   : 0
                                  [0:0] : 0     Fused Compare and Write Not Supported
                                
                                fna     : 0
                                  [2:2] : 0     Crypto Erase Not Supported as part of Secure Erase
                                  [1:1] : 0     Crypto Erase Applies to Single Namespace(s)
                                  [0:0] : 0     Format Applies to Single Namespace(s)
                                
                                vwc     : 0x1
                                  [0:0] : 0x1   Volatile Write Cache Present
                                
                                awun    : 1023
                                awupf   : 0
                                nvscc   : 1
                                  [0:0] : 0x1   NVM Vendor Specific Commands uses NVMe Format
                                
                                acwu    : 0
                                sgls    : 0
                                  [0:0] : 0     Scatter-Gather Lists Not Supported
                                
                                subnqn  :
                                ps    0 : mp:7.02W operational enlat:0 exlat:0 rrt:0 rrl:0
                                          rwt:0 rwl:0 idle_power:- active_power:-
                                ps    1 : mp:6.30W operational enlat:0 exlat:0 rrt:1 rrl:1
                                          rwt:1 rwl:1 idle_power:- active_power:-
                                ps    2 : mp:3.50W operational enlat:0 exlat:0 rrt:2 rrl:2
                                          rwt:2 rwl:2 idle_power:- active_power:-
                                ps    3 : mp:0.0760W non-operational enlat:210 exlat:1200 rrt:3 rrl:3
                                          rwt:3 rwl:3 idle_power:- active_power:-
                                ps    4 : mp:0.0050W non-operational enlat:2000 exlat:8000 rrt:4 rrl:4
                                          rwt:4 rwl:4 idle_power:- active_power:-
                                
                                1 Reply Last reply Reply Quote 0
                                • T
                                  tlehrian @george1421
                                  last edited by

                                  @george1421 And from State 2 (reversed):

                                  > nvme list
                                  
                                  Node             SN                   Model                                    Namespace Usage                      Format           FW Rev
                                  ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
                                  /dev/nvme0n1     S498NA0M403426       SAMSUNG MZVLB512HAJQ-000H2               1         149.49  GB / 512.11  GB    512   B +  0 B   EXA71HAQ
                                  /dev/nvme1n1     S499NX0M113634       SAMSUNG MZVLB256HAHQ-000H2               1           2.95  GB / 256.06  GB    512   B +  0 B   EXD71HAQ
                                  
                                  > nvme id-ctrl /dev/nvme0n1 -H
                                  
                                  NVME Identify Controller:
                                  vid     : 0x144d
                                  ssvid   : 0x144d
                                  sn      : S498NA0M403426
                                  mn      : SAMSUNG MZVLB512HAJQ-000H2
                                  fr      : EXA71HAQ
                                  rab     : 2
                                  ieee    : 002538
                                  cmic    : 0
                                    [2:2] : 0     PCI
                                    [1:1] : 0     Single Controller
                                    [0:0] : 0     Single Port
                                  
                                  mdts    : 9
                                  cntlid  : 4
                                  ver     : 10200
                                  rtd3r   : 186a0
                                  rtd3e   : 7a1200
                                  oaes    : 0
                                    [8:8] : 0     Namespace Attribute Changed Event Not Supported
                                  
                                  oacs    : 0x17
                                   [15:4] : 0x1   Reserved
                                    [3:3] : 0     NS Management and Attachment Not Supported
                                    [2:2] : 0x1   FW Commit and Download Supported
                                    [1:1] : 0x1   Format NVM Supported
                                    [0:0] : 0x1   Sec. Send and Receive Supported
                                  
                                  acl     : 7
                                  aerl    : 7
                                  frmw    : 0x16
                                    [4:4] : 0x1   Firmware Activate Without Reset Supported
                                    [3:1] : 0x3   Number of Firmware Slots
                                    [0:0] : 0     Firmware Slot 1 Read/Write
                                  
                                  lpa     : 0x3
                                    [1:1] : 0x1   Command Effects Log Page Supported
                                    [0:0] : 0x1   SMART/Health Log Page per NS Supported
                                  
                                  elpe    : 255
                                  npss    : 4
                                  avscc   : 0x1
                                    [0:0] : 0x1   Admin Vendor Specific Commands uses NVMe Format
                                  
                                  apsta   : 0x1
                                    [0:0] : 0x1   Autonomous Power State Transitions Supported
                                  
                                  wctemp  : 354
                                  cctemp  : 355
                                  mtfa    : 50
                                  hmpre   : 0
                                  hmmin   : 0
                                  tnvmcap : 512110190592
                                  unvmcap : 0
                                  rpmbs   : 0
                                   [31:24]: 0     Access Size
                                   [23:16]: 0     Total Size
                                    [5:3] : 0     Authentication Method
                                    [2:0] : 0     Number of RPMB Units
                                  
                                  sqes    : 0x66
                                    [7:4] : 0x6   Max SQ Entry Size (64)
                                    [3:0] : 0x6   Min SQ Entry Size (64)
                                  
                                  cqes    : 0x44
                                    [7:4] : 0x4   Max CQ Entry Size (16)
                                    [3:0] : 0x4   Min CQ Entry Size (16)
                                  
                                  nn      : 1
                                  oncs    : 0x1f
                                    [5:5] : 0     Reservations Not Supported
                                    [4:4] : 0x1   Save and Select Supported
                                    [3:3] : 0x1   Write Zeroes Supported
                                    [2:2] : 0x1   Data Set Management Supported
                                    [1:1] : 0x1   Write Uncorrectable Supported
                                    [0:0] : 0x1   Compare Supported
                                  
                                  fuses   : 0
                                    [0:0] : 0     Fused Compare and Write Not Supported
                                  
                                  fna     : 0
                                    [2:2] : 0     Crypto Erase Not Supported as part of Secure Erase
                                    [1:1] : 0     Crypto Erase Applies to Single Namespace(s)
                                    [0:0] : 0     Format Applies to Single Namespace(s)
                                  
                                  vwc     : 0x1
                                    [0:0] : 0x1   Volatile Write Cache Present
                                  
                                  awun    : 1023
                                  awupf   : 0
                                  nvscc   : 1
                                    [0:0] : 0x1   NVM Vendor Specific Commands uses NVMe Format
                                  
                                  acwu    : 0
                                  sgls    : 0
                                    [0:0] : 0     Scatter-Gather Lists Not Supported
                                  
                                  subnqn  :
                                  ps    0 : mp:7.02W operational enlat:0 exlat:0 rrt:0 rrl:0
                                            rwt:0 rwl:0 idle_power:- active_power:-
                                  ps    1 : mp:6.30W operational enlat:0 exlat:0 rrt:1 rrl:1
                                            rwt:1 rwl:1 idle_power:- active_power:-
                                  ps    2 : mp:3.50W operational enlat:0 exlat:0 rrt:2 rrl:2
                                            rwt:2 rwl:2 idle_power:- active_power:-
                                  ps    3 : mp:0.0760W non-operational enlat:210 exlat:1200 rrt:3 rrl:3
                                            rwt:3 rwl:3 idle_power:- active_power:-
                                  ps    4 : mp:0.0050W non-operational enlat:2000 exlat:8000 rrt:4 rrl:4
                                            rwt:4 rwl:4 idle_power:- active_power:-
                                  
                                  > nvme id-ctrl /dev/nvme1n1 -H
                                  
                                  NVME Identify Controller:
                                  vid     : 0x144d
                                  ssvid   : 0x144d
                                  sn      : S499NX0M113634
                                  mn      : SAMSUNG MZVLB256HAHQ-000H2
                                  fr      : EXD71HAQ
                                  rab     : 2
                                  ieee    : 002538
                                  cmic    : 0
                                    [2:2] : 0     PCI
                                    [1:1] : 0     Single Controller
                                    [0:0] : 0     Single Port
                                  
                                  mdts    : 9
                                  cntlid  : 4
                                  ver     : 10200
                                  rtd3r   : 186a0
                                  rtd3e   : 7a1200
                                  oaes    : 0
                                    [8:8] : 0     Namespace Attribute Changed Event Not Supported
                                  
                                  oacs    : 0x17
                                   [15:4] : 0x1   Reserved
                                    [3:3] : 0     NS Management and Attachment Not Supported
                                    [2:2] : 0x1   FW Commit and Download Supported
                                    [1:1] : 0x1   Format NVM Supported
                                    [0:0] : 0x1   Sec. Send and Receive Supported
                                  
                                  acl     : 7
                                  aerl    : 7
                                  frmw    : 0x16
                                    [4:4] : 0x1   Firmware Activate Without Reset Supported
                                    [3:1] : 0x3   Number of Firmware Slots
                                    [0:0] : 0     Firmware Slot 1 Read/Write
                                  
                                  lpa     : 0x3
                                    [1:1] : 0x1   Command Effects Log Page Supported
                                    [0:0] : 0x1   SMART/Health Log Page per NS Supported
                                  
                                  elpe    : 255
                                  npss    : 4
                                  avscc   : 0x1
                                    [0:0] : 0x1   Admin Vendor Specific Commands uses NVMe Format
                                  
                                  apsta   : 0x1
                                    [0:0] : 0x1   Autonomous Power State Transitions Supported
                                  
                                  wctemp  : 354
                                  cctemp  : 355
                                  mtfa    : 50
                                  hmpre   : 0
                                  hmmin   : 0
                                  tnvmcap : 256060514304
                                  unvmcap : 0
                                  rpmbs   : 0
                                   [31:24]: 0     Access Size
                                   [23:16]: 0     Total Size
                                    [5:3] : 0     Authentication Method
                                    [2:0] : 0     Number of RPMB Units
                                  
                                  sqes    : 0x66
                                    [7:4] : 0x6   Max SQ Entry Size (64)
                                    [3:0] : 0x6   Min SQ Entry Size (64)
                                  
                                  cqes    : 0x44
                                    [7:4] : 0x4   Max CQ Entry Size (16)
                                    [3:0] : 0x4   Min CQ Entry Size (16)
                                  
                                  nn      : 1
                                  oncs    : 0x1f
                                    [5:5] : 0     Reservations Not Supported
                                    [4:4] : 0x1   Save and Select Supported
                                    [3:3] : 0x1   Write Zeroes Supported
                                    [2:2] : 0x1   Data Set Management Supported
                                    [1:1] : 0x1   Write Uncorrectable Supported
                                    [0:0] : 0x1   Compare Supported
                                  
                                  fuses   : 0
                                    [0:0] : 0     Fused Compare and Write Not Supported
                                  
                                  fna     : 0
                                    [2:2] : 0     Crypto Erase Not Supported as part of Secure Erase
                                    [1:1] : 0     Crypto Erase Applies to Single Namespace(s)
                                    [0:0] : 0     Format Applies to Single Namespace(s)
                                  
                                  vwc     : 0x1
                                    [0:0] : 0x1   Volatile Write Cache Present
                                  
                                  awun    : 1023
                                  awupf   : 0
                                  nvscc   : 1
                                    [0:0] : 0x1   NVM Vendor Specific Commands uses NVMe Format
                                  
                                  acwu    : 0
                                  sgls    : 0
                                    [0:0] : 0     Scatter-Gather Lists Not Supported
                                  
                                  subnqn  :
                                  ps    0 : mp:7.02W operational enlat:0 exlat:0 rrt:0 rrl:0
                                            rwt:0 rwl:0 idle_power:- active_power:-
                                  ps    1 : mp:6.30W operational enlat:0 exlat:0 rrt:1 rrl:1
                                            rwt:1 rwl:1 idle_power:- active_power:-
                                  ps    2 : mp:3.50W operational enlat:0 exlat:0 rrt:2 rrl:2
                                            rwt:2 rwl:2 idle_power:- active_power:-
                                  ps    3 : mp:0.0760W non-operational enlat:210 exlat:1200 rrt:3 rrl:3
                                            rwt:3 rwl:3 idle_power:- active_power:-
                                  ps    4 : mp:0.0050W non-operational enlat:2000 exlat:8000 rrt:4 rrl:4
                                            rwt:4 rwl:4 idle_power:- active_power:-
                                  
                                  george1421G 1 Reply Last reply Reply Quote 0
                                  • george1421G
                                    george1421 Moderator @tlehrian
                                    last edited by

                                    @tlehrian Excellent you have been able to prove the case. Now we just need to paw through the data and see if we can find a unique key to identify the drives. We are done with the testing for now. We may need you to check a few more commands later if these two don’t give us a workable solution, but for now this is great!!.

                                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                                    T 1 Reply Last reply Reply Quote 0
                                    • T
                                      tlehrian @george1421
                                      last edited by

                                      @george1421 Cool. Glad I could help. Let me know if/when you need any other testing done.

                                      george1421G 1 Reply Last reply Reply Quote 0
                                      • Q
                                        Quazz Moderator
                                        last edited by

                                        Interesting.

                                        Reading up more on this subject, I suspect this issue isn’t actually specific to NVME drives, but rather to any multi drive system where one drive is larger than the other since they can initialize in ‘random’ order.

                                        Of course, with traditional drives they tend to be slow enough that they initialize in a more predictable pattern I guess.

                                        george1421G 1 Reply Last reply Reply Quote 0
                                        • george1421G
                                          george1421 Moderator @Quazz
                                          last edited by

                                          @Quazz Right since this know proven to happen on more than one hardware type, this is something the linux kernel developers should be working on. From the nvme printout we can surely see the drives changing location. The linux kernel developers may get around this by scanning the nvme drives and looking for a disk that has the boot blocks on it and picking that one for disk 0. In FOS’ case we aren’t trying to boot from the media. But I’m only guessing here. We surely need to do a bunch more research now that we have detailed info.

                                          Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                                          Q 2 Replies Last reply Reply Quote 0
                                          • Q
                                            Quazz Moderator @george1421
                                            last edited by Quazz

                                            @george1421 As far as I understand, in a normal Linux install they simply use UUID of the disk to determine the order (though predictability is still low since if any device isn’t working properly, any following devices will take up preceding values)

                                            eg

                                            3 disks
                                            /dev/sda
                                            /dev/sdb
                                            /dev/sdc
                                            
                                            disk /dev/sdb fails to load properly.
                                            
                                            /dev/sda
                                            /dev/sdb (was /dev/sdc previously!)
                                            

                                            Since no such data is ever stored on FOS, it’s basically a race between the devices and whoever wins is the one on top.

                                            1 Reply Last reply Reply Quote 0
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