My machine hung during a pvmove, and now I get kernel panic when
accessing, in any formatted way, the LV with /usr on. I've tried running
just 'pvmove' by itself as per the pvmove man page, but it won't recover.
The error message is:
pvmove: ABORTING: Mirror percentage check failed
I can display the pv, lv, and vg details if I boot from a CD, I can work
with the other LVs on the VG, but I can't figure out how to fix the LV.
How it got like this: I have an lvm2 setup on Debian Sarge (kernels
2.6.8 or 2.6.10, lvm version 2.01.04). My original drive, hda, was a
mess of small partitions, some LVM and some not.
Yesterday I added a new hard drive (hdb), and introduced it to the VG -
the intention being to move all the contents across and remove the old
drive from the VG, so that I can sort out its layout.
So I did 'pvmove /dev/hda5; pvmove /dev/hda6' as they are the two
partitions I needed freeing up. The first one (hda5) was taking ages
so I left it going overnight (stdout and stderr were being tee'd to a
file on a non-LVM partition).
I came down this morning and found the machine was frozen. It has done
this before very rarely, but never at so inopportune a time. The screen
was blank as monitor powersaving had apparently kicked in. The saved
stdout records that the first pvmove had gone to 100.0% completion,
but the second hadn't started displaying anything. The output from
pvdisplay etc is attached. There is an LV called /dev/VG1/pvmove0,
which is roughly twice as big as /dev/hda5 and a little smaller than
/dev/hda6, if that gives any clues.
I have seen (too late, of course!) that there are advisories such as Red
Hat's RHBA-2005:192-19 which mention problems with a long running pvmove.
Unfortunately I'm now stuck. Pvmove won't sort out the problem, and as
an LVM newbie I don't know what recovery tools I might use. The kernel
panics any time I either mount or fsck the Reiserfs on the /usr LV
(which was fine before this as it had been checked on reboot).
The linux-lvm list archive search doesn't help me, as I can't even make
it come up with the single posting that Google shows me on this error,
https://www.redhat.com/archives/linux-lvm/2005-February/msg00059.html
I'd be very grateful for any help at all in recovering /usr, it would
save me a massive reinstallation job.
Thanks in hope,
Nick, posting from work due to lack of /usr at home !
Scanning for physical volume names
--- Physical volume ---
PV Name /dev/ide/host0/bus0/target0/lun0/part5
VG Name VG1
PV Size 9.40 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 2407
Free PE 234
Allocated PE 2173
PV UUID VfRI1s-mghr-Eewv-w5cz-s5Au-Hj2W-1k3YwV
--- Physical volume ---
PV Name /dev/ide/host0/bus0/target0/lun0/part6
VG Name VG1
PV Size 17.42 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 4460
Free PE 239
Allocated PE 4221
PV UUID gjZrcn-3jGI-d8W3-3g5M-3T9j-6vf3-hJDDNo
--- Physical volume ---
PV Name /dev/ide/host0/bus0/target1/lun0/part4
VG Name VG1
PV Size 71.60 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 18330
Free PE 13875
Allocated PE 4455
PV UUID w6Mhpb-Sd3g-lSMJ-TFmH-GI0e-g9nK-eUpeX7
Finding all volume groups
Finding volume group "VG1"
--- Volume group ---
VG Name VG1
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 18
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 0
Max PV 0
Cur PV 3
Act PV 3
VG Size 98.43 GB
PE Size 4.00 MB
Total PE 25197
Alloc PE / Size 10849 / 42.38 GB
Free PE / Size 14348 / 56.05 GB
VG UUID ROCDhz-7YlG-U3JT-eSo6-LF1M-gzj5-eeyR80
--- Logical volume ---
LV Name /dev/VG1/Home
VG Name VG1
LV UUID XqRRcy-7JSB-8uNY-5AQl-swPt-6IEM-C8l8no
LV Write Access read/write
LV Status NOT available
LV Size 17.89 GB
Current LE 4580
Segments 2
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/VG1/Usr
VG Name VG1
LV UUID FPW32k-GZoo-W2GU-1w41-Wmdo-tfQW-w4JG2w
LV Write Access read/write
LV Status NOT available
LV Size 8.00 GB
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors 0
--- Logical volume ---
LV Name /dev/VG1/pvmove0
VG Name VG1
LV UUID Or9vT1-DEmW-abUS-2WpW-CJbz-mF74-FndTJb
LV Write Access read/write
LV Status NOT available
LV Size 16.49 GB
Current LE 4221
Segments 2
Allocation contiguous
Read ahead sectors 0
--- Physical volumes ---
PV Name /dev/ide/host0/bus0/target0/lun0/part5
PV UUID VfRI1s-mghr-Eewv-w5cz-s5Au-Hj2W-1k3YwV
PV Status allocatable
Total PE / Free PE 2407 / 234
PV Name /dev/ide/host0/bus0/target0/lun0/part6
PV UUID gjZrcn-3jGI-d8W3-3g5M-3T9j-6vf3-hJDDNo
PV Status allocatable
Total PE / Free PE 4460 / 239
PV Name /dev/ide/host0/bus0/target1/lun0/part4
PV UUID w6Mhpb-Sd3g-lSMJ-TFmH-GI0e-g9nK-eUpeX7
PV Status allocatable
Total PE / Free PE 18330 / 13875
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