topic Re: Drive path and device file in Operating System - HP-UX

Drive path and device file

Feljav — Wed, 01 Aug 2007 14:10:05 GMT

How can I find drive path in a rx5670? How can I match the device file with drive path?

Re: Drive path and device file

A. Clay Stephenson — Wed, 01 Aug 2007 14:12:49 GMT

ioscan -C disk -fn

Re: Drive path and device file

Sandman! — Wed, 01 Aug 2007 14:18:16 GMT

If you know the drive path then use ioscan(1M) and if you have the device filename then use lssf(1M) to find out the drive path.

for ex. if drive path is known then the device file can be obtained as:

# ioscan -fnH 0/0/0/1.2.3

and if disk device file is known then the drive path can be obtained as:

# ioscan -f /dev/dsk/c#t#d#

~cheers

Re: Drive path and device file

Feljav — Wed, 01 Aug 2007 14:20:38 GMT

I know that. But I don't know how i can find the hardware path of a specific disk.

Re: Drive path and device file

Sandman! — Wed, 01 Aug 2007 14:42:03 GMT

Could you please provide an example of what you are trying to get at.

~thanks

Re: Drive path and device file

Torsten. — Wed, 01 Aug 2007 14:46:12 GMT

You need to know how to read the hardware path for this system. Post the path.

Re: Drive path and device file

A. Clay Stephenson — Wed, 01 Aug 2007 14:48:30 GMT

Your question is very unclear but here is what I would do if I were absolutely clueless.

1) ioscan -fn # to detect any new devices
2) insf # to create device nodes for any newly discovered devices
3) ioscan -C disk -fn and note each /dev/rdsk/cXtYdZ device node.

4) For each /dev/rdsk/cXtYdZ device do:
dd if=/dev/rdsk/cXtYdZ bs=256k count=2000 of=/dev/null and observe the drive LED's.

Re: Drive path and device file

Torsten. — Wed, 01 Aug 2007 15:06:39 GMT

Hardware pathes for internal drives and slots are always fixed. But it is different from one system type to another. For external pathes it depends on all the hardware (disk chassis/SAN switch ...).

You can even get the information for the EFI path from an running HP-UX by using "ioscan -fne".

Example:
For your rx5670 the internal, upper left disk has

0/1/1/0/1/1.0.0
and
ACPI(HWP0002,100)/PCI(1|0)/PCI(1|1)/SCSI(Pun0,Lun0)

You will find the device file in the ioscan output too.

What path do you need?

Re: Drive path and device file

Juan M Leon — Wed, 01 Aug 2007 15:09:10 GMT

Feljav,

Can you post the output of ioscan -fnC disk

Thank you

Re: Drive path and device file

Feljav — Wed, 01 Aug 2007 15:24:57 GMT

# ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
==========================================================================
disk 0 0/0/2/0.0.0 sdisk CLAIMED DEVICE HP 73.4GMAS3735NC
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 2 0/0/2/0.2.0 sdisk CLAIMED DEVICE HP 73.4GMAS3735NC
/dev/dsk/c0t2d0 /dev/rdsk/c0t2d0
/dev/dsk/c0t2d0s1 /dev/rdsk/c0t2d0s1
/dev/dsk/c0t2d0s2 /dev/rdsk/c0t2d0s2
/dev/dsk/c0t2d0s3 /dev/rdsk/c0t2d0s3
disk 4 0/0/2/1.3.0 sdisk CLAIMED DEVICE HP DVD-ROM 30
5
/dev/dsk/c1t3d0 /dev/rdsk/c1t3d0
disk 1 0/1/1/0/1/1.0.0 sdisk CLAIMED DEVICE HP 73.4GMAS3735N
C
/dev/dsk/c3t0d0 /dev/rdsk/c3t0d0
/dev/dsk/c3t0d0s1 /dev/rdsk/c3t0d0s1
/dev/dsk/c3t0d0s2 /dev/rdsk/c3t0d0s2
/dev/dsk/c3t0d0s3 /dev/rdsk/c3t0d0s3
disk 3 0/1/1/0/1/1.2.0 sdisk CLAIMED DEVICE HP 73.4GMAS3735N
C
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0

I need to know what physical disk correspond at what device file. All disk are internal.
Thank you

Re: Drive path and device file

Tim Nelson — Wed, 01 Aug 2007 15:37:45 GMT

From your example.
0/0/2/0.0 relates to /dev/dsk/c0t0d0
0/0/2/0.2.0 relates to /dev/dsk/c0t2d0
and so on...

The device files are directly under the listed hardware.

For the device files with cxtxdxs1-3 these are partions on the same disk. Typically seen with IPF systems for boot disks.

Re: Drive path and device file

Torsten. — Thu, 02 Aug 2007 02:31:58 GMT

0/0/2/0.0.0 lower left

0/0/2/0.2.0 lower right

0/1/1/0/1/1.0.0 upper left

0/1/1/0/1/1.2.0 upper right

Please read
http://forums1.itrc.hp.com/service/forums/helptips.do?#33
too!