topic Re: How to rescan scsi disk linux and P400 controller in Operating System - Linux

How to rescan scsi disk linux and P400 controller

Yanick Quirion — Wed, 06 Feb 2008 21:26:02 GMT

Dear all,

I have a simple question, but I was unable to find the right answer yet.

I have an DL380G5 running ESX server 3.5. I installed all system management tools and the Array Configuration Utility. When I add a LUn from ACU, I can't see it into my ESX host:

[esx-01]:/root# cat /proc/driver/cciss/cciss0
cciss0: HP Smart Array P400 Controller
Board ID: 0x3234103c
Firmware Version: 4.12
IRQ: 137
Logical drives: 3
Current Q depth: 0
Current # commands on controller: 0
Max Q depth since init: 1
Max # commands on controller since init: 59
Max SG entries since init: 31

cciss/c0d0: 12.58GB RAID 5
cciss/c0d1: 367.00GB RAID ADG
cciss/c0d2: 210.05GB RAID ADG

This is wrong. The current disks configuration is 12.58GB RAID 5 LUN (the first one is correct - this is the OS) and another 75GB RAID 6 LUN.

I downloaded a small tool called cciss_vol_status and this return my the right configuration:

[esx-01]:/root# cciss_vol_status -q /dev/cciss/c0d0
/dev/cciss/c0d0: (Smart Array P400) RAID 5 Volume 0 status: OK.
/dev/cciss/c0d0: (Smart Array P400) RAID 6 Volume 1 status: OK.

If I'm doing a fdisk -l I saw the old configuration for c0d1:

Disk /dev/cciss/c0d1: 367.0 GB, 367002648064 bytes
255 heads, 63 sectors/track, 44618 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

I tried all command like echo "rescan" echo "rescan" > /proc/driver/cciss/cciss0 or echo "scsi scan-new-devices" > /proc/scsi/scsi but it didn't work.

Is somebody can told me how to refresh the cciss controller on ESX or Linux RHEL?

Thank you and best regards,
Yanick

Re: How to rescan scsi disk linux and P400 controller

Steven E. Protter — Thu, 07 Feb 2008 12:41:53 GMT

Shalom Yanick,

Normally you reboot the system, which will force a re-read of disk devices.

If you have the PSP pack installed then the rescan utility which you have apparently already tried is your best bet.

Perhaps the Array Configuration Utility(ACU) is a way to get this done without system book.

SEP

Re: How to rescan scsi disk linux and P400 controller

Jimmy Vance — Fri, 08 Feb 2008 13:09:50 GMT

I think the correct syntax for the 'echo' command is

echo "rescan" > /proc/driver/cciss/cciss0/1

Another script you can try is called rescan-scsi-bus.sh. This script is included in SuSE linux.

http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh-1.25

Hope this helps

Re: How to rescan scsi disk linux and P400 controller

Yanick Quirion — Fri, 08 Feb 2008 13:39:03 GMT

Dear Jimmy,

Thanks for your answer, but it seems the this script doesn't work with cciss device driver. This driver doesn't provide any information into /proc/scsi/scsi, on which the script is based. Also, it seems looking for /sys filesystem, which doesn't exist into ESX server based on RHEL 3 and kernel 2.4.

Thank you anyway for your help!

Regards,
Yanick

Re: How to rescan scsi disk linux and P400 controller

Yanick Quirion — Fri, 08 Feb 2008 13:39:14 GMT

Dear Jimmy,

Thanks for your answer, but it seems that this script doesn't work with cciss device driver. This driver doesn't provide any information into /proc/scsi/scsi, on which the script is based. Also, it seems looking for /sys filesystem, which doesn't exist into ESX server based on RHEL 3 and kernel 2.4.

Thank you anyway for your help!

Regards,
Yanick