CENTOS 7, XFS and LVM



  • OK, so I have seen the posts about XFS and fog uploading RAW partitions. Our hard drives are 800gb and the RAW images are huge. Someone mentioned LVM is not supported by fog which is ok. Does this mean that FOG 1.2.0 will be able to upload and xfs partition if not using LVM and will not be in RAW format? We are prepping our installs of CENTOS 7 and either we rebuild using ext4 or use XFS without LVM.

    V/R



  • @Quazz thanks


  • Moderator



  • @Quazz How can I obtain fog 1.3? do not see it on the website.


  • Senior Developer

    @finvader FOG 1.2.0 is probably what you’re running currently? I’m only guessing. The RC’s (which will become 1.3.0) should have XFS support already.



  • @Tom-Elliott We dont need to shrink it. Its just we have a 764gb drive and when we using single disk multi partition image and fog images the largest partition as raw, it doesnt image just the data on the disk.


  • Moderator

    FOG 1.3 has XFS support, but XFS does not allow shrinking of partitions, so you can’t use the Resizable Image type and are forced to use at best the Multiple Partition image. Should be better than RAW in terms of capture speed, but the image will likely be huge all the same.

    EXT4 does support shrinking and will allow the use of Image Resizable, creating a smaller image to deploy to your clients (and thus less time needed to deploy your image)

    So, unless you’re tied into XFS and/or almost never need to image, I would recommend EXT4 for your situation.

    You can always add LVM after deployment, as far as I know. (although rather tricky iirc)


  • Senior Developer

    FOG 1.2.0 won’t do any such thing. XFS support was available but not coded for.

    LVM Support will not be included in any releases (most likely) as trying to culminate and piece together the volumes is not a simple thing and requires a lot of extra code being added. That’s just to build the volume, then we have to use the LVM layout instead of a typical drive which is an obstacle in and of itself.

    XFS support is built into the init’s now, but XFS does not allow volumes to be shrunk so while you can grab an XFS file as an image, you cannot put an XFS based volume onto a drive that’s smaller than the original source it was taken from.

    Hopefully this helps.


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