topic Re: Cannot kill ioscan in Operating System - HP-UX

Cannot kill ioscan

Ratzie — Wed, 09 Feb 2005 13:20:01 GMT

I have a issue with a scsi disk. Yes, it will be replaced, so that is not an issue. But, I have a process that I cannot kill.

I ran an ioscan and can not kill the process.
The server will not be rebooted so it will not wipe out that process.
kill -9 does not work either.

Thanks for the help.

Re: Cannot kill ioscan

Florian Heigl (new acc) — Wed, 09 Feb 2005 13:22:54 GMT

You can't kill anything that's currently doing some io in the kernel, but it means no harm either.

Just leave it hanging, it will resume when the new harddrive was inserted.

(We've been used to it when working with EMC^2 Clariions :)

Re: Cannot kill ioscan

A. Clay Stephenson — Wed, 09 Feb 2005 13:25:05 GMT

It's waiting on an i/o request to complete and that is a higher priority event that responding to a signal (kill). If this is a hot-plug disk, you can probably remove the disk (which will interrupt the i/o request) and then ioscan will terminate. Don't be afraid to yank a hot-plug disk especially if it's mirrored, that triggers a SCSI bus reset and that can be considered a normal (more or less) event. If it's not mirrored, you are dead in the water anyway -- at least with respect to this disk.

Re: Cannot kill ioscan

Geoff Wild — Wed, 09 Feb 2005 13:36:22 GMT

You might also be able to renice the process at a lower priority...

Otherwise, just leave it - no harm done - wait for disk replacement and/or reboot.

Rgds...Geoff