Identify internal disk.

[Ryan Phlip]

Hi,

I have a failed internal disk on my DS20 Tru64 Alpha Server. I want to physically identify this disk on the server. This is to make sure I am removing the correct disk from the server.

This is a cluster system.

Many Thanks,
Ryan Philip

[Vladimir Fabecic]

Please post output of:
# hwmgr -show scsi | grep dsk42
# hwmgr -view device | grep dsk42

[Venkatesh BL]

I think you can use:
# hwmgr -flash light -dsf /dev/disk/dsk42c

This will make the disklight blink.

[Vladimir Fabecic]

Not all disk can flash lights.
You can also try this and see on which disk activity led flashes:
# dd if=/dev/rdisk/dsk24c of=/dev/zero

[Ryan Phlip]

Hi,

I had read the administration guide and tried the flash and dd commands but there are no lights on the internal disk, so it becomes difficult. There are 4 9GB disk and 2 18GB disk. By using the Hwmgr flash command I cannot identify because the lights are not there.

Can someone explian to me the how to Identify the bus 0. Is there a way to do that5?

Regards,
Ryan Philip

[Rob Leadbeater]

Hi,

Can you post the output of the commands previously requested by Vladimir ?

dsk42 could be a single disk, or it might be part of a hardware RAID disk.... With the information provided so far, it's impossible to know...

Cheers,

Rob

[Kapil Jha]

If flash light is not there....only esacpe from hardware engineer is to use dd command and put hands on disk and u can feel which disk is working.
There would be 2 internal disks so chance are bright ;)

BR,
Kapil+

[Vladimir Fabecic]

Can someone explian to me the how to Identify the bus 0. Is there a way to do that5?

In SRM it should be bus "a".
For example DKA100 (in "console mode") should be BUS 0 ID 1 LUN 0. So, for example, if you are looking for disk in BUS 0 and SCSI ID 1, it should be DKA100.
As far as I know bus 0 should be "built in" controler bus.
In DS20 bus "b" or BUS 1 is usually a PCI SCSI controller.
If you need more details, first post what I asked for.

[Ryan Phlip]

Hi,

Firstly dsk42c is a single disk. It is not in any raid. The disk is spoiled so it does not respond. the output of the dd command is

dd if=/dev/disk/dsk42c of=/dev/zero
/dev/disk/dsk42c: Device busy

The other output is attached.

Regards,
Ryan Philip

[Vladimir Fabecic]

Command should be:
dd if=/dev/rdisk/dsk42c of=/dev/zero
not
dd if=/dev/disk/dsk42c of=/dev/zero
Try again.
So it is disk DKA100 in SRM.
And view in your disk shelf:
----dkao-----
----DKA100--- FAILED DISK
----dka200---
----dka300---
----dka400---
----dka500---
-------------