topic Re: rx2660 logical drive not detected in Operating System - HP-UX

rx2660 logical drive not detected

Miguel Silva Rentes — Tue, 26 Feb 2008 16:39:39 GMT

Hi everyone,

i was trying to setup my server with the following smart array configuration:

two 36GB disks in raid 1+0 (bays 7 and 8)
one 72GB disk in raid 0 (bay 6)
one 72GB disk in raid 0 (bay 5)

note that the two raid 0 disks are not "connected", they are supposed to be used as independent logical volumes.

when on the smart array utility i finish the configuration, all the logical drives apear ok, and i have 3 entries as described previously. The problem is that when i start the LVM (using SAM -> disks and file systems) the two 72GB disks, do not appear. Instead an entry of 72GB appears, and has two paths instead of one.

How do i setup the system, so that i can use the 72GB disks, independently?

best regards
Miguel Rentes

Re: rx2660 logical drive not detected

Torsten. — Tue, 26 Feb 2008 16:53:26 GMT

Can you post some more information please?

# ioscan -fn

(assuming cissx is the controller device file)

# saconfig /dev/ciss3
# sautil /dev/ciss3

Re: rx2660 logical drive not detected

TTr — Tue, 26 Feb 2008 16:54:42 GMT

What is the output of "ioscan -fnkC disk"? This is more reliable than sam.

The internal smart array is both a raid controller and a simple SAS controller. You don't have to make the disks in bays 5 and 6 RAID0, you leave them alone and they will show up as individual disks outside of the RAID controller.

You can either check the disks with ioscan or delete the two raid0 LUNs within the smart array.

Re: rx2660 logical drive not detected

Miguel Silva Rentes — Tue, 26 Feb 2008 18:03:51 GMT

I've taken the two logical drives for each 72 GB disk and ran "ioscan -fnCdisk". This is the short output from it:

disk 0 0/0/2/1.0.16.0.0 /dev/dsk/c0t0d0 (which is the CD-ROM)

disk 1 0/3/0/0/0/0.0.0 sdisk
/dev/dsk/c1t0d0 /dev/dsk/c1t0d0s1 /dev/dsk/c1t0d0s2 /dev/dsk/c1t0d0s3 /dev/rdsk/c1t0d0 /dev/rdsk/c1t0d0s1 /dev/rdsk/c1t0d0s2 /dev/rdsk/c1t0d0s3
(which is the logical drive for the two 36 GB disks)

This tells me that those two 72 GB disks are not detected :S Should I try to create a logical drive for each disk in a different manner (one first than the other perhaps)?

Best regards

Re: rx2660 logical drive not detected

Torsten. — Tue, 26 Feb 2008 18:09:07 GMT

You should post more info!

Re: rx2660 logical drive not detected

TTr — Tue, 26 Feb 2008 18:35:00 GMT

When I said "leave them alone" earlier, I meant not to create any LUNs out of them. So now you have two options, either provide the output of the "sa" commands and "ioscan -fn" in its entirety to try and fix the RAID0 problem
or
delete the two RAID0 luns and rerun "ioscan" without the -k option and the two disks should show up as standalone disks.

Re: rx2660 logical drive not detected

Torsten. — Tue, 26 Feb 2008 18:37:27 GMT

The question is:

Is the "normal standard" SAS controller installed or the SmartArray P400?

Everything else depends on this.

Re: rx2660 logical drive not detected

Miguel Silva Rentes — Thu, 28 Feb 2008 20:39:08 GMT

Hi everyone,

I read the documentation for the saconfig and the pdf "Managing Disks and File Systems" and was able to create all volume groups/name I wanted with vgcreate/mknod/etc... I was assuming sam could do everything with the disks but using the command line was much more easier.

Anyway, thanks for your help.

Best regards,

Miguel Rentes

Re: rx2660 logical drive not detected

Torsten. — Thu, 28 Feb 2008 20:43:06 GMT

Good news.

Please read this too:

http://forums11.itrc.hp.com/service/forums/helptips.do?#33

Re: rx2660 logical drive not detected

TTr — Fri, 29 Feb 2008 01:51:20 GMT

Also read my personal quote in the forum profile.