topic Re: Bad disk on rx4640 in Operating System - HP-UX

Bad disk on rx4640

Cara Rollins — Thu, 25 Jun 2009 12:10:23 GMT

Hi, I have a bad boot disk on an rx4640 - /dev/dsk/c2t1d0s2. The IO path is 0/1/1/0.1.0. How do i tell if this is slot 0 or 1 on the front of the server?

Re: Bad disk on rx4640

Sunny123_1 — Thu, 25 Jun 2009 12:16:43 GMT

Hi

Use dd command after running it the LED will blow of your harddisk.

Regards
Sunny

Re: Bad disk on rx4640

Torsten. — Thu, 25 Jun 2009 12:18:00 GMT

Path 0/1/1/0.1.0 is always the upper disk.

The lower disk is either
0/1/1/0.0.0

or

0/1/1/1.0.0

depending on the disk backplane (single or dual bus).

Re: Bad disk on rx4640

Cara Rollins — Thu, 25 Jun 2009 12:54:19 GMT

what is the sytax and option for dd to query only? i dont see it in the man page.

Re: Bad disk on rx4640

Ganesan R — Thu, 25 Jun 2009 13:15:49 GMT

Hi,

To read from the disk without any distruction,

dd if=/dev/rdsk/c2t1d0 of=/dev/null bs=1024k count=64

This will read initial 64MB of the data from the disk. You can omit count if you want to read the entire disk.

But if the disk is dead, dd command may hang.

Re: Bad disk on rx4640

Vivek Bhatia — Thu, 25 Jun 2009 13:17:57 GMT

Hi Cara,

Run the below command and you will see the LED blinking.

#dd if=/dev/dsk/c2t1d0 of=/dev/null

Then you can remove the disk form the slot.

Regards,
Vivek