topic Re: vg00 strange sync error in Operating System - HP-UX

vg00 strange sync error

likid0 — Mon, 26 Feb 2007 09:28:59 GMT

Hy,

before,I patched my 11i box, i split the mirror in vg00, a couple of weeks after patching a merged the mirror, but i get an io error when syncing lvol1, as you can see here:

tifon1:/# vgsync vg00
vgsync: Couldn't re-synchronize stale partitions of the logical volume:
I/O error
vgsync: Couldn't resynchronize logical volume "/dev/vg00/lvol1".
vgsync: Couldn't resynchronize volume group "vg00".

i have tried to re-do the mirror in that lvol:

tifon1:/HP# lvreduce -m 0 /dev/vg00/lvol1
Logical volume "/dev/vg00/lvol1" has been successfully reduced.
Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
tifon1:/HP# lvextend -m 1 /dev/vg00/lvol1
The newly allocated mirrors are now being synchronized. This operation will
take some time. Please wait ....
lvextend: Couldn't re-synchronize stale partitions of the logical volume:
I/O error
lvextend: Couldn't resynchronize logical volume "/dev/vg00/lvol1".

its allways lp0:

tifon1:/HP# lvdisplay -v /dev/vg00/lvol1 | more
--- Logical volumes ---
LV Name /dev/vg00/lvol1
VG Name /dev/vg00
LV Permission read/write
LV Status available/stale
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 304
Current LE 38
Allocated PE 76
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c0t6d0 38 38
/dev/dsk/c3t6d0 38 38

--- Logical extents ---
LE PV1 PE1 Status 1 PV2 PE2 Status 2
00000 /dev/dsk/c0t6d0 00000 current /dev/dsk/c3t6d0 00000 stale
00001 /dev/dsk/c0t6d0 00001 current /dev/dsk/c3t6d0 00001 current
00002 /dev/dsk/c0t6d0 00002 current /dev/dsk/c3t6d0 00002 current
00003 /dev/dsk/c0t6d0 00003 current /dev/dsk/c3t6d0 00003 current
00004 /dev/dsk/c0t6d0 00004 current /dev/dsk/c3t6d0 00004 current
00005 /dev/dsk/c0t6d0 00005 current /dev/dsk/c3t6d0 00005 current
00006 /dev/dsk/c0t6d0 00006 current /dev/dsk/c3t6d0 00006 current
00007 /dev/dsk/c0t6d0 00007 current /dev/dsk/c3t6d0 00007 current
00008 /dev/dsk/c0t6d0 00008 current /dev/dsk/c3t6d0 00008 current
00009 /dev/dsk/c0t6d0 00009 current /dev/dsk/c3t6d0 00009 current
00010 /dev/dsk/c0t6d0 00010 current /dev/dsk/c3t6d0 00010 current

there are no scsi errors in syslog, so it looks like the disk is ok.

Any ideas ??

Re: vg00 strange sync error

James R. Ferguson — Mon, 26 Feb 2007 09:36:48 GMT

Hi Daniel:

This doesn't bode well for your disk. I'd look for errors thusly:

# dd if=/dev/rdsk/c3t6d0 of=/dev/null bs=1024k

Regards!

...JRF...

Re: vg00 strange sync error

DCE — Mon, 26 Feb 2007 09:37:40 GMT

Start over from scratch

Reduce all the mirrors off of c3t6d0
lvreduce -m 0 /dev/vg00/lvol1 /dev/dsk/c3t6d0
and so on for all lvols on the disk

vgreduce the disk from vg00

pvcreate -B the disk (since it is vg00)

add the disk to vg00

run the mkboot command

mirror to the specific disk

lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c3t6d0

Re: vg00 strange sync error

Mridul Shrivastava — Mon, 26 Feb 2007 09:41:24 GMT

It could be a disk hardware issue so please try dd and then let us know if it succeeds.. else you may have to replace the disk..

Re: vg00 strange sync error

Luk Vandenbussche — Mon, 26 Feb 2007 09:58:15 GMT

Check the attachment

Re: vg00 strange sync error

likid0 — Mon, 26 Feb 2007 10:59:38 GMT

dd if=/dev/rdsk/c3t6d0 of=/dev/null bs=1024k
34732+1 records in
34732+1 records out
the disk looks ok

Re: vg00 strange sync error

Mike Shilladay — Tue, 27 Feb 2007 03:49:05 GMT

Hi Daniel,

We have had exactly this problem before,always the first extent. The only solution we found and believe me we certainly did try to fix it, was to replace the disk. Starting from pvcreate'ing the volume did nothing to rectify this. Always the same error.

Sorry Daniel, time to replace the disk.

Mike.

Re: vg00 strange sync error

likid0 — Tue, 27 Feb 2007 04:07:55 GMT

When i did the dd to check the origin disk, te procces has freezed, and doesnt respond

dd if=/dev/rdsk/c0t6d0 of=/dev/null bs=1024k

not even to a kill, could it be the origin disk the one that is having problems?