Oracle/App down! lvm error cause or effect of problem?

[Kevin_31]

msgcnt 863 vxfs: mesg 038: vx_dataioerr - /dev/vgapps11/lvol7 file system file d
ata write error

when I do a dmesg.

I also have multiple:
DIAGNOSTIC SYSTEM WARNING:
The diagnostic logging facility has started receiving excessive
errors from the I/O subsystem. I/O error entries will be lost
until the cause of the excessive I/O logging is corrected.
If the diaglogd daemon is not active, use the Daemon Startup command
in stm to start it.
If the diaglogd daemon is active, use the logtool utility in stm
to determine which I/O subsystem is logging excessive errors.
1/0/0/0.2.16.0.0.4.0 sdisk
DIAGNOSTIC SYSTEM WARNING:
The diagnostic logging facility is no longer receiving excessive
errors from the I/O subsystem. 20 I/O error entries were lost.

Help??!!!

[Pete Randall]

Kevin,

Try doing

dd if=/dev/vgapps11/lvol7 of=/dev/null bs=1024k

to see if you get a read error which is probably an indication of a bad disk.

Pete

[Helen French]

Hi Kevin:

This can be a hardware failure on the disk. Check it with stm tools and fsck. Some possible tries:

1) Make sure you have the latest Vxfs/LVM patches installed
2) Check with dd command:
# dd if=/dev/dsk/c#t#d# of=/dev/null bs=64k
3) Try running a full file system check:
# fsck -F vxfs -y -o full /dev/vg##/lvol##
4) If you are still unable to access the file system after running fsck and a second fsck returns no errors, then use newfs to recreate the file system and restore the data from backup tape. If this problem persists, then contact the Hardware Response Center for help infurther diagnosis and correction of potential disk failure.

HTH,
Shiju

[S.K. Chan]

A few more things to throw in ..

From LVM side, check for stale extents.
# lvdisplay -v /dev/vgapps11/lvol7 | more

Run exerciser on the suspexted disk to determine if any hardware error can be detected.
# cstm
cstm> map
cstm> sel dev
cstm> exercise
cstm> exeractlog
cstm> exerfaillog
cstm> exerinfo