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    PC unbootable after capture fails

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    • dolfD
      dolf @Wayne Workman
      last edited by

      @Wayne-Workman Good to hear that it works for you. The fact that it usually works, but didn’t work for me is the definition of an edge case. And things should not break when edge cases happen.

      I just realized that I unknowingly tested exactly what you suggested, and that’s probably why it worked. When I try to resize the problematic image, however, I get this: gparted_details_bad.htm

      Still, GParted wins, because it safely terminates before destroying the disk. FOG should, too.

      This discussion shows that most people aren’t really sure why this happens. We could use the following algorithm to work around the problem (expanding on what GParted does):

      increment := "1GB or a certain percentage of the disk size"
      partition = /dev/sda2
      
      calibrate partition
      
      target_size := check file system on partition for errors and fix them and get estimate of smallest supported shrunken size
      
      if there are errors
        stop
      
      do
        simulate resizing to target_size
        target_size += increment
      while simulation fails and target_size < disk_size
      
      if target_size < disk_size
        // this means the simulation must have succeeded for the current value of target_size
        actually resize the file system
        actually resize the partition
        // note that file systems and partitions are not the same thing, and are not necessarily the same size... TODO: this is yet another edge case to consider
      
      // if all simulations failed, we just don't resize the disk, and the capture process can still continue uninterrupted
      
      
      Tom ElliottT 1 Reply Last reply Reply Quote 0
      • dolfD
        dolf
        last edited by

        Sorry, actually no, the image where the resize succeeded has the same mbr, but fewer files in sda2 (about 10GB less than the one that fails to resize).

        The suggestion for making the capture process safer still holds, though 🙂

        I even tested it: If I resize to 70GB instead of the minimum (about 66GB), it works just fine. I suspect that it isn’t possible to know exactly what the minimum size of an NTFS partition will be without simulating. That’s probably why the authors of ntfsresize include messages like this (emphasis mine):

        • Estimating smallest shrunken size supported …
        • You might resize at 71189536768 bytes or 71190 MB (freeing 178764 MB).
        • Please make a test run using both the -n and -s options before real resizing!

        Luckily, simulation takes about 10 seconds for a 250GB drive, so it won’t be a large performance hit.

        Wayne WorkmanW 1 Reply Last reply Reply Quote 0
        • Wayne WorkmanW
          Wayne Workman @dolf
          last edited by

          @dolf I agree with all of that. How good are you with shell script?

          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!
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          • Tom ElliottT
            Tom Elliott @dolf
            last edited by

            @dolf While I understand what you’re saying, I don’t think it should continue going. I agree it should not, in the least, actually resize the partition unless we know absolutely all will continue fine down the road (which is not very practical, as I don’t know of a way to “dry_run” the fog system before actually performing tasks to test for all these edge cases. The reason there are different image types (resize, non-resize, raw) is to allow people to use what will suit them best. If resize is going to cause issues, I think it wise to fail to upload, but not attempt altering the disk.

            Can you post the contents of your image’s (broken please) d1.fixed_size_partitions file? I suspect what’s occurring is an unexpected partition is resizing, thus moving the start sector of the next partition. That I can fix, though I don’t know where to begin.

            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! Get in contact with me (chat bubble in the top right corner) if you want to join in.

            Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

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            dolfD 1 Reply Last reply Reply Quote 1
            • dolfD
              dolf @Tom Elliott
              last edited by

              @Wayne-Workman I’m not great at shell scripting. I google about 5 pages for every line I write. I mostly do Python, PHP and C.

              @Tom-Elliott I’ll have to dissapoint you 😛

              1
              
              1 Reply Last reply Reply Quote 0
              • Tom ElliottT
                Tom Elliott
                last edited by

                Another thing comes to mind as well.

                FOG Does run some math to calculate the smallest size of the partition plus a little more (wiggle room if you will). I may need to see an upload again using debug and at the point it’s testing (once complete) break out and see what is showing for the ntfsresize variable.

                lsblk and fdisk -l would also, possibly, be extremely helpful as well (before AND after).

                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! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                • dolfD
                  dolf
                  last edited by

                  I know it’s a long thread, but here it is: https://forums.fogproject.org/topic/8059/pc-unbootable-after-capture-fails/10

                  1 Reply Last reply Reply Quote 0
                  • dolfD
                    dolf
                    last edited by

                    Just to show that it does work if you make the wiggle room a tad (where tad=4GB) bigger: gparted_details_70GB.htm

                    That’s using the same “broken” image. Everything works perfectly on that image, so I wouldn’t really call it broken. chkdsk agrees with me. It does, however, contain massive software packages with millions of files.

                    Tom ElliottT 1 Reply Last reply Reply Quote 0
                    • Tom ElliottT
                      Tom Elliott @dolf
                      last edited by

                      @dolf Was the system defragged before it was uploaded?

                      I ask because: … http://tuxera.com/forum/viewtopic.php?f=2&t=31012

                      I don’t know if this was/is the case, just may be worth a shot?

                      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! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                      Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                      Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                      Tom ElliottT 1 Reply Last reply Reply Quote 0
                      • Tom ElliottT
                        Tom Elliott @Tom Elliott
                        last edited by

                        To add further, the part where it’s talking about shifting the data on the drive in a strange format the MFT segments are being moved around and possible extend partial bits to beyond the partition layout. Or so I believe, I don’t really know, but it would leave some understanding as to why a slightly larger partition layout would work.

                        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! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                        Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                        Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                        • Wayne WorkmanW
                          Wayne Workman
                          last edited by

                          I would tend to think that those “massive” files you’re talking about just didn’t have the room to be shifted around with the target being 2GB free. Defragging before uploading could solve that - and make your image perform better too.

                          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!
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                          https://fogtesting.fogproject.us/
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                          • dolfD
                            dolf
                            last edited by

                            I didn’t defrag, but I analyzed the fragmentation, and it reported 1% fragmented.
                            However, last night the hard disk of the PC I originally used to develop this image started acting up. chkdsk /R /F /V /X on reboot returned no error or bad sectors, but the DELL Pre-boot System Assessment reports that the HDD has Error Code 2000-0142. I couldn’t find what that code means, other than that the HDD has failed. I think it’s probably a problem with the HDD’s electronics, rather than the disk surface, because the diagnostic utility only took a minute, so it obviously didn’t scan the disk surface. I’m replacing the disk now, to check.

                            1 Reply Last reply Reply Quote 0
                            • Wayne WorkmanW
                              Wayne Workman
                              last edited by

                              And the truth comes out. 🙂

                              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!
                              Daily Clean Installation Results:
                              https://fogtesting.fogproject.us/
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                              • dolfD
                                dolf
                                last edited by

                                Or does it? I just started from scratch on a new image with a new HDD, and I’m having the same problem… MFT gets corrupted. I’ll do some more thorough tests when I have time.

                                1 Reply Last reply Reply Quote 0
                                • dolfD
                                  dolf
                                  last edited by

                                  I’m still experiencing this problem. Running trunk these days. However, I have found another workaround to upload resizable images:

                                  • Capture a non-resizable image
                                  • Make a resizable image, and copy the files manually from the non-resizable image
                                  • Create these files manually:
                                    • d1.fixed_size_partitions
                                      Just contains “:1”
                                    • d1.minimum.partitions
                                      I make the minimum size of the resizable partition quite a bit larger than the uncompressed size of d1p2.img
                                      Can check this with gzip -l d1p2.img
                                    • d1.original.fstypes
                                      /dev/sda2 ntfs
                                    • d1.original.swapuuids
                                      empty
                                  • Deploy

                                  It works. Therefore it seems that resizing the partition before and after capturing with partclone.ntfs is not necessary, even for resizable images.

                                  1 Reply Last reply Reply Quote 1
                                  • dolfD
                                    dolf
                                    last edited by

                                    This problem persists in 1.3.0-RC-11.

                                    Wayne WorkmanW 1 Reply Last reply Reply Quote 0
                                    • Wayne WorkmanW
                                      Wayne Workman @dolf
                                      last edited by Wayne Workman

                                      @dolf Can we recap what’s going on?

                                      You have a Windows 7 (pro, home, enterprise?) image already, it is resizable.
                                      You deploy this, and update the deployed machine.
                                      You then recapture.
                                      And it fails to recapture?

                                      All of my images at work are resizable, and often we will deploy them, update them, and re-capture them without issue. We did this with Windows 7, Windows 8.1, and now with Windows 10.

                                      What’s special about your image?

                                      Boot into linux somehow on a computer that has your image deployed to it’s disk. You can either use a FOG debug deploy task or just any live Linux disk.

                                      Give us the output of these commands once you do:
                                      lsblk
                                      fdisk -l
                                      lspci

                                      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!
                                      Daily Clean Installation Results:
                                      https://fogtesting.fogproject.us/
                                      FOG Reporting:
                                      https://fog-external-reporting-results.fogproject.us/

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                                      • dolfD
                                        dolf
                                        last edited by

                                        Windows 7 Enterprise. I don’t know what is special about this image. The problem started after installing a bunch of large software packages on the master image. Fragmentation was less than 1%.

                                        It fails when trying to resize the partition, as described in previous posts. When doing the same thing with CloneZilla, it works. The fixed-size option in FOG also works, because it doesn’t try to resize the partition. As far as I can see, resizing the partition is not necessary for capturing images with partclone, even when restoring to a smaller drive. You might as well remove that step from the capturing process, which will speed things up significantly.

                                        So now I just capture it into a temporary image using the “fixed size” option, and then move the files manually to an image which is configured as “resizable”.

                                        mint mint # lsblk
                                        NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
                                        sda      8:0    0 232.9G  0 disk 
                                        ├─sda1   8:1    0   100M  0 part 
                                        └─sda2   8:2    0 232.8G  0 part 
                                        sdb      8:16   1   7.5G  0 disk /cdrom
                                        ├─sdb1   8:17   1   1.6G  0 part 
                                        └─sdb2   8:18   1   2.3M  0 part 
                                        sr0     11:0    1  1024M  0 rom  
                                        loop0    7:0    0   1.5G  1 loop /rofs
                                        
                                        mint mint # fdisk -l
                                        
                                        Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 sectors
                                        Units: sectors of 1 * 512 = 512 bytes
                                        Sector size (logical/physical): 512 bytes / 512 bytes
                                        I/O size (minimum/optimal): 512 bytes / 512 bytes
                                        Disklabel type: dos
                                        Disk identifier: 0x95d3684b
                                        
                                        Device     Boot  Start       End   Sectors   Size Id Type
                                        /dev/sda1  *      2048    206847    204800   100M  7 HPFS/NTFS/exFAT
                                        /dev/sda2       206848 488396799 488189952 232.8G  7 HPFS/NTFS/exFAT
                                        
                                        mint mint # lspci
                                        00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
                                        00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
                                        00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
                                        00:16.3 Serial controller: Intel Corporation 6 Series/C200 Series Chipset Family KT Controller (rev 04)
                                        00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
                                        00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
                                        00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
                                        00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
                                        00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b4)
                                        00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
                                        00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a4)
                                        00:1f.0 ISA bridge: Intel Corporation Q67 Express Chipset Family LPC Controller (rev 04)
                                        00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 04)
                                        00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
                                        

                                        I omitted the RAM drives and /dev/sdb, since I was booting from a LinuxMint USB drive.

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                                        • S
                                          Sebastian Roth Moderator
                                          last edited by

                                          @dolf said:

                                          As far as I can see, resizing the partition is not necessary for capturing images with partclone, even when restoring to a smaller drive.

                                          I don’t think this is true.

                                          You can try using a tool called testdisk which might be able to fix the MFT issue for you. To find out what exactly caused this we need the exact error message from when it happens (resize…?)!

                                          Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                                          Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                                          dolfD 1 Reply Last reply Reply Quote 1
                                          • dolfD
                                            dolf @Sebastian Roth
                                            last edited by

                                            @Sebastian-Roth said in PC unbootable after capture fails:

                                            To find out what exactly caused this we need the exact error message from when it happens (resize…?)!

                                            See this message, as well as @Tom-Elliott’s reply on it.

                                            The take-home message is still: GParted stops before destroying the disk. FOG should do the same.

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