topic Re: How to simulate disk or volume error in Operating System - HP-UX

How to simulate disk or volume error

Etzion Bar-Noy — Mon, 27 Dec 2004 08:17:09 GMT

Hi.
During my work, I need to simulate disk or volume error for my QA team. The only option I see in front of me now is to disconnect the hot-swap disks (although I don't know how the system will react to their return). Can you advise of any better way to do so?

Thanks!
Etzion

Re: How to simulate disk or volume error

Steven E. Protter — Mon, 27 Dec 2004 08:40:09 GMT

Your option will work.

If you pull an unmirrored boot disk, your system will crash. Otherwise the reaction of the system will depend on what is on the disk.

pvdisplay -v can give you some idea what the content of the indivdual disk is.

I used a tape printer to label my disks for just the scenario you are in, so I would know which device was being pulled, so I could check it.

When a hot swap is pulled and replaced an lbolt goes into the dmesg output in /var/adm/syslog/syslog.log

That message will remain in the log until the system is rebooted.

SEP

Re: How to simulate disk or volume error

Fred Ruffet — Mon, 27 Dec 2004 08:54:33 GMT

Other options :
. disconnect SCSI cable
. poweroff SCSI array or FC Hub/switch
. dd on a disk (if no mirror, may produce more damage than you really want)
. attack the disk with a screwdriver (vendor's warranty may not apply :)

Regards,

Fred

Re: How to simulate disk or volume error

Etzion Bar-Noy — Mon, 27 Dec 2004 10:44:11 GMT

Fred, it doesn't seem like simulation to me :-)
I could, of course, kill the disk with acid, but then again, it would not be simulation we'll talk about.

Thanks you both for your answers.

Etzion