Raid System on HP-UX 11

[Oliver Schmitz]

Dear all,

I have an somewhat misterious problem with a raid system. We have an C3600 WS with HP-UX 11 TCOE.
The Raid system is running with Raid 5 and 0 to mirror parity (RAID50 for our vendor).
I created (months ago) two LVols on the raid and two global spare disks. I checked that my system recognizes these TWO disks by searching for available boot devices and by checking the entries in /dev/rdsk. Everything looks fine and I created a FS on one of the existing disks with SAM (I am using HFS).
I do not know anymore wether I did not see it or wether everything was alright, but: Today I want to use the second block of space (Lvol2 on the Raid) and SAM couldn`t find it (anymore?). I checked the RAID system itself, booted again (disks both found) and tried it with SAM again: No success. On boot both raid volumes are recognized but not anymore later on. Do anybody have a suggestion what to do or how to detect the root of this problem?

Thanks a lot and best regards,

Oliver

[Naveej.K.A]

Hi,

some doubts!!!
what type of storage box you have??

when you create a raid array OS will not be able to see the disks, but the luns which you have created inside the rAID array..

regds
Naveej

[Shaikh Imran]

Hi,
Are you able to see the LUNs from the ioscan ?
#ioscan -fnC disk
what is the output of the above command ?
Also check for the latest patches related to your Disk array.

Regards

[Oliver Schmitz]

Thanks for the quick answers.

It is an oxygen raid 700 system. External RAID system with one RAID controler. Both Lvol Id's are mapped to the channel connected to my host.Therefore it is properly seen on boot.

ioscan -fnC disk gives aswell correct information (it recognizes the second lvol):

root@hostname: ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
=======================================================================
disk 0 10/0/14/0.0.0 sdisk CLAIMED DEVICE HP CD-Writer cd16r
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 5 10/0/15/1.1.0 sdisk CLAIMED DEVICE ADVUNI OXYGENRAID 700
/dev/dsk/c3t1d0 /dev/rdsk/c3t1d0
disk 6 10/0/15/1.2.0 sdisk CLAIMED DEVICE ADVUNI OXYGENRAID 700
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0
disk 1 10/0/15/1.5.0 sdisk CLAIMED DEVICE HP 73.4GMAN3735MC
/dev/dsk/c3t5d0 /dev/rdsk/c3t5d0
disk 2 10/0/15/1.6.0 sdisk CLAIMED DEVICE HP 73.4GST373405LC
/dev/dsk/c3t6d0 /dev/rdsk/c3t6d0


Any ideas after this. Thanks very much in advance.

Best regards,

Oliver

[Naveej.K.A]

strings /etc/lvmtab ????

regds
Naveej

[Oliver Schmitz]

Dear Naveji,

thanks for this further help. Here is something inconsistent:

root@hostname: more /etc/lvmtab
^Cè^D/dev/vg00
w±`^R>àJ^à ^A/dev/dsk/c3t6d0
/dev/vg01
w±`^R>üB^A^A/dev/dsk/c3t7d0
/dev/vg02
w±`^R?N^F¢^A/dev/dsk/c3t5d0
/dev/vgraid1
w±`^R@+^à ^\^A/dev/dsk/c3t1d0

The /dev/dsk/c3t2d0 is the object which I want to use, but it is not mentioned here. All the special files are existing in /dev/dsk an /dev/rdsk.

Do you have any other idea resp. do you know what it means that nothing is in /etc/lvmtab for my raid lvol?

Thanks,