topic Re: How can I change the pv's device file? in Operating System - HP-UX

How can I change the pv's device file?

Ryan Gu — Fri, 14 Apr 2006 00:23:22 GMT

I have a disk and its device file is /dev/dsk/c2t3d0.

For some reason, I want to change its device file to /dev/dsk/c3t1d0.

How can I do?

Re: How can I change the pv's device file?

Antonio Cardoso_1 — Fri, 14 Apr 2006 01:34:11 GMT

Hi jason,

in "citjdk" naming, i, j, k values mean:
- i : SCSI interface card number
- j : SCSI target number
- k : device number.

The only way to get this device filename changed is to move the disk drive to another controller and change its SCSI target number.

You cannot just change the filename.

What was your goal?

Re: How can I change the pv's device file?

Ryan Gu — Fri, 14 Apr 2006 01:38:05 GMT

Could the command "mkfs" do that?

# mkfs -H 1/2/3 /dev/dsk/catbdc

Re: How can I change the pv's device file?

Antonio Cardoso_1 — Fri, 14 Apr 2006 01:47:30 GMT

No,
mkfs is for creation of a file on the given device or logical volume.
what is actually your concern about using the device?

antonio.

Re: How can I change the pv's device file?

Josiah Henline — Fri, 21 Apr 2006 13:31:14 GMT

I have used a link in the situation that I needed to change my clusterlock disk before.

ln /dev/dsk/c2t3d0 /dev/dsk/c3t1d0
ln /dev/rdsk/c2t3d0 /dev/rdsk/c3t1d0

What reason do you have to want the device name to change?

Re: How can I change the pv's device file?

Patrick Wallek — Fri, 21 Apr 2006 13:44:07 GMT

Since disk device files are tied so closely with the Controller and Targets (ie. SCSI ID) of the device, I'm not sure it would be advisable to try to change it.

c2t3d0 is telling you that the device is on the 2nd discovered controller and the device itself is at SCSI ID 3.

If you were to change it to c3t1d0, you would be giving false information, saying that the disk is now on the 3rd discovered controller at SCSI ID / target 1.

I can't see how this would make sense.

Re: How can I change the pv's device file?

Torsten. — Fri, 21 Apr 2006 14:00:18 GMT

The only thing you can change in CxTyDz is the "x", but what is your reason?

You'll confuse everbody including yourself, believe me.