topic Re: ioscan output in Operating System - HP-UX

ioscan output

Olga_1 — Wed, 13 Dec 2006 14:37:53 GMT

Hello does anybody know why I get so many devices for one internal disk and only 2 for another one. What does s1, s2 means?:
Itanium server HP 11i ver2

ioscan -funC disk
Class I H/W Path Driver S/W State H/W Type Description
===============================================
disk 1 1/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 73.4GMAX3073NC
/dev/dsk/c0t6d0 /dev/dsk/c0t6d0s2 /dev/rdsk/c0t6d0 /dev/rdsk/c0t6d0s2 /dev/dsk/c0t6d0s1 /dev/dsk/c0t6d0s3 /dev/rdsk/c0t6d0s1 /dev/rdsk/c0t6d0s3

disk 2 1/0/1/1/0/4/1.6.0 sdisk CLAIMED DEVICE HP 73.4GMAX3073NC
/dev/dsk/c3t6d0 /dev/rdsk/c3t6d0

Thank you.

Re: ioscan output

Coolmar — Wed, 13 Dec 2006 14:41:10 GMT

Looks like disk1 is partitioned into "slices". I have never seen that with HP, but see it all the time with Solaris.

Re: ioscan output

Ivan Krastev — Wed, 13 Dec 2006 14:44:39 GMT

This is slices (usually 3 for disks) for Itanium machines running 11.23.

Normal section 1 is the Extensible Firmware Interface (EFI) partition, section 2 is the HP-UX system partition and section 3, it is the optional HP Service Partition (HPSP).

regards,
ivan

Re: ioscan output

spex — Wed, 13 Dec 2006 14:46:22 GMT

Hi Olga,

Please see this thread:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=967274

PCS

Re: ioscan output

James R. Ferguson — Wed, 13 Dec 2006 14:46:23 GMT

Hi Olga:

The "s" stands for "slice". Since you are running an Itanium server you need to be aware that LVM mirroring of the boot disk differs a bit from PA-RISC mirroring procedures. Be sure to read Appendix-A of this document:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Regards!

...JRF...

Re: ioscan output

Ivan Krastev — Wed, 13 Dec 2006 14:50:17 GMT

Also you can create/list partitions using idisk - http://docs.hp.com/en/B2355-60105/idisk.1M.html

ivan

Re: ioscan output

Torsten. — Wed, 13 Dec 2006 14:58:40 GMT

Hi,

these "slices" are and old tradition of HP-UX, almost forgotten in the versions 10 until now.

Now the Integrity servers are using them (partitions) to create different file systems (1. for EFI - FAT32, 2. for HPUX - LVM, 3. for service tools) for the boot disk(s).

This is also the reason for a different procedure to mirror the boot disks.

Your boot disks has c0t6d0 as its device file, but every partition gets its own device file too, first partition gets c0t6d0s1 ...

Re: ioscan output

Olga_1 — Wed, 13 Dec 2006 15:03:20 GMT

thank you