topic Re: lvsync - I/O error in Operating System - HP-UX

lvsync - I/O error

James W Hitchcock — Sat, 08 Nov 2008 18:03:32 GMT

We had to have a disk replaced in vg00. We did the normal procedure .. vgcfgrestore, vgchange -a y, vgsync ... logical volumes would not sync up. When I tried to manually lvsync the logical volumes -- I was able to re-sync all volumes except lvol1 --- I got cannot resync logical volume i/o error ... but it does not appear to be a hardware issue anymore. Any ideas??

Re: lvsync - I/O error

sen_ux — Sat, 08 Nov 2008 19:23:18 GMT

Hi,

this could be a disk issue.
Did u verify the disk using dd.?

Thanks

Re: lvsync - I/O error

Bill Hassell — Sat, 08 Nov 2008 23:46:49 GMT

I/O error can only be a hardware error. Start by looking in /var/adm/syslog/syslog.log -- do you see SCSI or lbolt errors? Also check the physical volume with pvdisplay (one for the working disk, the other for the replaced disk. The replacement disk must be identical in size to the old disk. If not, you will get an I/O error trying to write beyond the end of the disk.

Otherwise, check the disk with diskinfo and use dd on the replaced disk. Assuming that the new disk is /dev/rdsk/c2t1d0, run the tests like this like this:

diskinfo /dev/rdsk/c2t1d0

Make sure the size of the disk is not 0 bytes or smaller than the working disk.

dd if=/dev/rdsk/c2t1d0 of=/dev/null bs=1024k

If you immediately get an I/O error, something is basically wrong with the new disk. If dd runs for a few records (dozens, or hundreds) then fails, there is a bad spot on the replacement.

Re: lvsync - I/O error

Nguyen Anh Tien — Sat, 08 Nov 2008 23:47:35 GMT

Please help to give me the output of "vgdisplay -v vg00"
what is new disk file system name???