Hi,
malahal@us.ibm.com wrote:
Colin Faber [cfaber@gmail.com] wrote:
was unavailable. After searching around I kept coming back to suggestions
stating that removal of the missing device from the volume group was the
solution to getting thing back online again. So using 'vgreduce
--removemissing raid' then 'lvchange -ay raid' to update the changes -
Neither command errored and vgreduce noted that 'raid' was not available
again.
Since your LV (array) is most likely allocated on md1 that disappeared,
you really want --partial (lvm command) rather than --removemissing.
Your metadata is updated and any knowledge about 'array' LV is now
almost gone due to the above 'vgreduce'. I say almost gone because it
might be there but you really need true LVM expertise now!
Did you save a copy of your old LVM metadata before the reboot? See your
/etc/lvm/backup/raid has any reference to 'array' LV at all.
Yes, it's still there (well /etc/lvm/archive/). So how do I back out of
this after I've already run removemissing? If I try and restore the old
vg backup it just tells me that it can't restore it because the uuid is
missing for md1.
By the way, thank you very much for the response. Any suggestions and
help are greatly welcome.
-cf
--Malahal.
So as it stands now I have no logical volume, I have a volume group and I
have a functional md0 array. If I dump the first 50 or so megs of the md0
raid array I can see the volume group information, as well as the lv
information including various bits of file system information.
At this point I'm wondering can I recover the logical volume and recover
this 1.8TB of data.
For completeness here is the results of various display and scan commands:
root@Aria:/dev/disk/by-id# pvscan
PV /dev/md0 VG raid lvm2 [1.82 TB / 1.82 TB free]
Total: 1 [1.82 TB] / in use: 1 [1.82 TB] / in no VG: 0 [0 ]
root@Aria:/dev/disk/by-id# pvdisplay
--- Physical volume ---
PV Name /dev/md0
VG Name raid
PV Size 1.82 TB / not usable 2.25 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 476933
Free PE 476933
Allocated PE 0
PV UUID oI1oXp-NOSk-BJn0-ncEN-HaZr-NwSn-P9De9b
root@Aria:/dev/disk/by-id# vgscan
Reading all physical volumes. This may take a while...
Found volume group "raid" using metadata type lvm2
root@Aria:/dev/disk/by-id# vgdisplay
--- Volume group ---
VG Name raid
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 11
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.82 TB
PE Size 4.00 MB
Total PE 476933
Alloc PE / Size 0 / 0
Free PE / Size 476933 / 1.82 TB
VG UUID quRohP-EcsI-iheW-lbU5-rBjO-TnqS-JbjmZA
root@Aria:/dev/disk/by-id# lvscan
root@Aria:/dev/disk/by-id#
root@Aria:/dev/disk/by-id# lvdisplay
root@Aria:/dev/disk/by-id#
Thank you.
-cf
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