On Oct 29, 2014, at 10:03 AM, Gary Artim <gartim(a)gmail.com> wrote:
I have a xfs filesystem (4 drives) and one died /dev/sdc1. It was
used for backup and trying to recover one directory. Any ideas would be great. I was able
to drop the volume that died and have a pv of 3 now, but getting lvm to recognize (create
a dev) is not happening
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)
I can't tell how the four drives were arranged such that there's one XFS volume.
Is this LVM linear (default)? If so I'd say it's toast, but whether you can maybe
mount it ro and use the remaining metadata in each AG to extract data on each drive is
probably best asked on the XFS list. The same applies to md linear/concat. If it's
raid0 then it's definitely toast.
I'll assume it's not raid1/mirror or you'd be able to use it degraded and
recovery is pretty sraightforward.
Chris Murphy