topic Re: RedHat 4.0 / udev / SAN disks in Operating System - Linux

RedHat 4.0 / udev / SAN disks

TJ Toedebusch — Fri, 14 Apr 2006 09:25:54 GMT

working with RedHat 4.0, I have noticed a few differences with the way SAN storage reporting works compared to RH 3.0. We use the EMC tool inq and the HP supplied lssd from the fibreutils rpm to do some reporting on SAN storage. I have noticed, that after rebooting, the makedev's we run to allow inq/lssd to see and report on the SAN storage does not work. I believe it is just a udev issue, but being unfamiliar with udev, I am at a loss as to how to proceed. Any info on how to make udev devices for SAN storage?

Thanks

Re: RedHat 4.0 / udev / SAN disks

Steven E. Protter — Sat, 15 Apr 2006 14:21:59 GMT

Shalom TJ,

This is probably the reporting utility being broken.

Is the storage available to the RH 4 system?

If not, its perhaps a more serious RH 4 bug.

SEP

Re: RedHat 4.0 / udev / SAN disks

Bharath_Pingali — Wed, 03 May 2006 17:42:41 GMT

Hi TJ,

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00306808/c00306808.pdf?jumpid=reg_R1002_USEN

hope this helps !!!

Re: RedHat 4.0 / udev / SAN disks

TJ Toedebusch — Fri, 05 May 2006 07:07:09 GMT

I think I found the issue. the inq utility requires the /dev/sgXX links be made and this is normally done by running MAKEDEV sg against the /dev directory... but with udev, the /dev directory get rebuilt after reboot. I think if I just make those links and mknodes under /etc/udev/devices, I will be OK. Haven't tried yet, but this the path I am going down.

Thanks.

Re: RedHat 4.0 / udev / SAN disks

Florian Heigl (new acc) — Fri, 05 May 2006 12:48:07 GMT

We had a small linux workshop with HP a few weeks ago. I couldn't test any of what we were showed (powerpoint, not a real workshop, actually), but from what I recall they were very aware of that issue, and I think there ought to be a configuration mechanism in udev that will automatically create the symlinks for You.

In general, if You have a devfs/devmapper/udev controller /dev filesystem, don't manually edit in there.

(rant: this is where enterprise distributions get us. 'supported' is outdated and doesn't work, making it work is unsupported, horray!)

Re: RedHat 4.0 / udev / SAN disks

TJ Toedebusch — Mon, 15 May 2006 12:33:23 GMT

Figured out how to dynamically populate the /dev dir after reboots using udev.