topic Re: Kernel message: Device busy for revalidation in Operating System - Linux

Kernel message: Device busy for revalidation

Neise_2 — Fri, 27 Jun 2003 13:12:36 GMT

Hello, on (several) Systems with a Raid-5-Controller in /var/log/warn the following message occurs:

Jun 27 01:50:28 demo-linux kernel: cciss: Device busy for revalidation (usage=4)

The Message is repeated from time to time.

Is this message harmful. Or is it safe to ignore it?

Best regards,

Christian Neise.

P.S.: we use Suse Linux 8.0 and 8.2 with Kernel 2.4.18-64GB-SMP and 2.4.20-64GB-SMP.

Re: Kernel message: Device busy for revalidation

Caesar_3 — Fri, 27 Jun 2003 13:28:45 GMT

Hello!

First do you feel you have problem with raid?
Could be some bugs in the driver and maybe
you need to upgrate the kernel, also check on
the kernel official site if they know about.
Goto www.kernel.org

Caesar

Re: Kernel message: Device busy for revalidation

Steven E. Protter — Fri, 27 Jun 2003 13:35:03 GMT

If this involves data on a raid controller, it should be investigated before its ignored.

You might want to do some performance monitoring and see if your disk loads are running heavy.

If there is a correspondence between disk spikes and these errors you could be triggering them because your I/O load is too heavy.

If its just happening and you can't tie any event into it, I'd worry.

I'm attaching some HP-UX sar scripts. You may have to modify them slightly to get them to work on Linux. They collect data in the background to a file.

I'm not clear though that this message has to do with the Raid-5 controller.

SEP

Re: Kernel message: Device busy for revalidation

Steven E. Protter — Fri, 27 Jun 2003 13:37:42 GMT

sorry, here are the scripts....

see attachment.

SEP