HP-UX 11.00 volume problem

[Ben_219]

I am having problem writing anything to one of the volume. Whenever I do a write to the volume, the whole system would hang and I have to reboot it from GSP console because I could not even login anywhere, including console.
I check the syslog and found nothing reference to disk related problem. After I reboot it, I can see part of the writing was done.
This volume contains three disks and one of the disk was replaced recently. I am wondering if the problem is with SCSI controller.

Anyway I can check the SCSI controller?

Thanks,

[Pete Randall]

Ben,

I would suspect one of the disks is bad. Try running dd against each of the disks:

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

(repeat for each of the disks)

If you get an I/O error from one of them, then that disk is bad and needs to be replaced. Here's an excellent guide to disk replacement:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf


Pete

[Berd]

If you had problems with the controller I would expect to see alerts in the syslog.
Which filesystem are you attempting to write when the problem occurs ? What sort of file ?How are you attempting to write to it ?

Sounds extreme to reboot the machine for this type of issue.

Regards,
BErd

[Ben_219]

Berd,

I tried just cp a text file or any kind of file. I agree that system hanging is kind of odd, but that is what is going on.

I am trying dd again to see if any error happens.

Thanks.

[goldboy]

Ben,
what type of server are you using ?
and where are the 3 disks located ?

Tal

[Ben_219]

I am running RP5470 with HP-UX 11.00.

[goldboy]

Ben,
I would try to boot the server up in single user mode.

then try to run DD on the disks as mentioned by Pete.

I have no information on your LVM structure or disk configuration but another thing you can do is while running commands that seems to be hung, pull out the other 2 disks that are the non OS disks and see if that relases the BUS (that ofcourse in single user mode).

if the commands reply back after you pulled a disk out, that disk is hunging the BUS.

hope it helps

Tal

[Ben_219]

It is the volume problem. I blew alway the volume and recreated it.

Thanks all for the help.