topic Re: Question on disk device file in Operating System - HP-UX

Question on disk device file

claudio_22 — Fri, 07 Oct 2005 05:26:47 GMT

Hello ,

I've follwing two disk on a box rx7620.

disk 0 0/0/0/3/0.5.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c0t5d0 /dev/rdsk/c0t5d0
disk 1 0/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0
/dev/dsk/c0t6d0s1 /dev/rdsk/c0t6d0s1
/dev/dsk/c0t6d0s2 /dev/rdsk/c0t6d0s2
/dev/dsk/c0t6d0s3 /dev/rdsk/c0t6d0s

In vg00 I've /dev/dsk/c0t6d0s2 ; what means that "s2" final ? And why I haven't it on first disk , that is phisically the same .

I woould use same device file for c5t0d0 ( with s2 ) but I can't create it .

Re: Question on disk device file

Stephen Keane — Fri, 07 Oct 2005 05:31:38 GMT

s1, s2, s3 etc are sections of the same physical disk. It depends how you create/partition the disk as to whether you use the whole disk (i.e. one section so s'n' not displayed) or split it into sections.

Re: Question on disk device file

Arunvijai_4 — Fri, 07 Oct 2005 05:36:38 GMT

S -- Slice or Section of a disk. Its all how you create it.

-Arun

Re: Question on disk device file

melvyn burnard — Fri, 07 Oct 2005 05:39:44 GMT

The addition of the s1, s2, and s3 on the c0t6d0 drive is due to the fact that this is an Itanium Server, and this disc has been configured as a Boot disc.
It will only get done when you set up a disc for boot capability.
This is due to the way EFI handles boot devices and booting HP-UX.

s1 is for the EFI stuff
s2 is for HP-UX
s3 is for the HP Support Partition (Offline Diagniostics)

Re: Question on disk device file

claudio_22 — Fri, 07 Oct 2005 05:43:14 GMT

This is a fabric installation .

s1 and s3 are 500Mb and 400MB each .

s2 is almost whole disk .. 70Gb .

I don't understand this partition . I would prefered use c0t6d0 for whole disk space .

Now what can I do for mirror on c0t5d0 ?

Re: Question on disk device file

melvyn burnard — Fri, 07 Oct 2005 05:49:16 GMT

Take a read of:
http://docs.hp.com/en/5990-8172/5990-8172.pdf

Look at page 528 for a diagram, and then use pages 528-530 to do the mirroing of your boot disk

Re: Question on disk device file

claudio_22 — Fri, 07 Oct 2005 05:53:14 GMT

Thanks a lot !

I didn't know this ..I'm new to Itanium :)