xfs fs on lvm, failed drive.

xfs fs on lvm, failed drive.

[Gary Artim]

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Hi...wondering if there is anyway I can salvage a directory on the lvm
volume that is xfs? thanks of any help, assembled:

parted /dev/sdx
mklabel gpt
mkpart primary xfs 1 -1 (sometime xfs doesnt work until the xfsprogs are
installed and reboot)
set 1 lvm on

do this for each drive.
pvcreate /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
vgcreate backup /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
lvcreate -L 9T -n backuplv backup
mkfs.xfs -L backuplv /dev/mapper/backup-backuplv
/dev/mapper/backup-backuplv /xfs xfs   (in fstab)

failed drive:
/dev/sdc1

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Re: xfs fs on lvm, failed drive.

[Stan Hoeppner]

On 10/29/2014 12:19 PM, Gary Artim wrote:
> Hi...wondering if there is anyway I can salvage a directory on the lvm
> volume that is xfs? thanks of any help, assembled:
> 
> parted /dev/sdx
> mklabel gpt
> mkpart primary xfs 1 -1 (sometime xfs doesnt work until the xfsprogs are
> installed and reboot)
> set 1 lvm on
> 
> do this for each drive.
> pvcreate /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
> vgcreate backup /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
> lvcreate -L 9T -n backuplv backup
> mkfs.xfs -L backuplv /dev/mapper/backup-backuplv
> /dev/mapper/backup-backuplv /xfs xfs   (in fstab)
> 
> failed drive:
> /dev/sdc1

You've created an XFS filesystem atop a concatenation of non-redundant
drives so this condition should not be unexpected.  It's not a directory
you want to salvage, but the files within it.  If they reside on sdc1
you're out of luck without using data recovery tools.  If they reside on
sdb1, sdd1, or sde1, then running xfs_repair might make the FS mountable
and get you access to them again.

That's assuming LVM is still running with one drive gone, or will still
assemble the concatenation with one drive missing.  I don't use LVM.

Cheers,
Stan

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Re: xfs fs on lvm, failed drive.

[Gary Artim]

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will try running xfs_repair...been trouble using lvm. thanks!

On Wed, Oct 29, 2014 at 11:18 AM, Stan Hoeppner <stan@hardwarefreak.com>
wrote:

> On 10/29/2014 12:19 PM, Gary Artim wrote:
> > Hi...wondering if there is anyway I can salvage a directory on the lvm
> > volume that is xfs? thanks of any help, assembled:
> >
> > parted /dev/sdx
> > mklabel gpt
> > mkpart primary xfs 1 -1 (sometime xfs doesnt work until the xfsprogs are
> > installed and reboot)
> > set 1 lvm on
> >
> > do this for each drive.
> > pvcreate /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
> > vgcreate backup /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
> > lvcreate -L 9T -n backuplv backup
> > mkfs.xfs -L backuplv /dev/mapper/backup-backuplv
> > /dev/mapper/backup-backuplv /xfs xfs   (in fstab)
> >
> > failed drive:
> > /dev/sdc1
>
> You've created an XFS filesystem atop a concatenation of non-redundant
> drives so this condition should not be unexpected.  It's not a directory
> you want to salvage, but the files within it.  If they reside on sdc1
> you're out of luck without using data recovery tools.  If they reside on
> sdb1, sdd1, or sde1, then running xfs_repair might make the FS mountable
> and get you access to them again.
>
> That's assuming LVM is still running with one drive gone, or will still
> assemble the concatenation with one drive missing.  I don't use LVM.
>
> Cheers,
> Stan
>

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