Tom+Dale wrote:
Greetings.
I am hoping that some LVM experts can help me out. I have a partial
volume group that spans two drives and I would like to recover the
logical volume that was on it so that the data is accessible. The
group (VolGroup00) was originally set up spanning part of one drive
and all of the other drive (both IDE). The group was entirely applied
to a single logical volume (LogVol00) to be mounted as /video. This
was working until I tried to make some changes and I fear that I may
have lost the data. I cannot seem to resolve this problem anywhere
else. I have spent almost two weeks searching for clues and asking for
help in other forums, but I do not yet have a solution. I hope to
provide all of the useful information below.
*History*
I am relatively new to linux, having built my own PVR using Fedora and
MythTV during the last year. I have relied heavily upon HowTos and
guides written by other users. One of the guides that I followed
instructed me to set up XFS using LVM which would allow me to span
multiple hard disks. Recently, I added a new SATA drive to my MythTV
system. The new drive was designated as /dev/sda. It appeared to add
into the existing volume group without any problem, though I did not
get it to the point where the space was accessible. I planned to
further research that problem; however, the new hard drive failed
before I got that far. Here’s what things looked like after removing
the drive:
[root[at]mythserver ~]# pvdisplay
Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'.
Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'.
--- Physical volume ---
PV Name /dev/hda5
VG Name VolGroup00
PV Size 66.12 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 16926
Free PE 0
Allocated PE 16926
PV UUID 317l2C-oay1-TWFG-5NTX-XJS3-vLal-Xh5bBL
--- Physical volume ---
PV Name /dev/hdb
VG Name VolGroup00
PV Size 298.09 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 76311
Free PE 0
Allocated PE 76311
PV UUID nfLxS1-0u3t-5Zr9-57iu-1oZe-Bkkd-75SERQ
--- Physical volume ---
PV Name unknown device
VG Name VolGroup00
PV Size 232.88 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 59617
Free PE 225
Allocated PE 59392
PV UUID fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv
Tom. I'm sorry that not too many people have looked into this with you.
First, what were the results of the "vgreduce --removemissing
VolGroup00" command? I'm generating a theory here. That VolGroup00 had a
single LV, LogVol00, and the disks /dev/hda5 and /dev/hdb. Then--I'm
guessing here--you did a "pvcreate /dev/sda" .. And followed that with a
"vgextend VolGroup00 /dev/sda" .. Then perhaps did you do a "lvextend -l
<some number> /dev/VolGroup00 /dev/sda"? After that, at some point,
/dev/sda went dead. Am I close? Could you recount to us what steps you
took to "expand" the VG? I realize you may have been asleep, but this
data is crucial. When I do any LVM work I typically record all my input
and output in a text editor and save it or print it out for safety..
So, the questions are:
1) Was that LV the ONLY LV in the VG?
2) You did try to expand the LV to include /dev/sda?
3) Did you use any GUI to do this? Or did you rely on the command line?
Peter
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