Disk issue!!

[Amit Manna_6]

HI All,

One of the 10.20 server got hung. After rebooting also

it was not coming up.
It was found that the Secondary root disk is faulty.

The secondary root disk(c0t6d0) was replaced however

it was found that the primary disk (c0t5d0) was also

faulty.

All but one of the logical volumes have been resynced,

the volume which is at fault is /dev/vg00/lvol7. This is

displayling an I/O error.

c0t5d0 has been tested with dd if=/dev/rdsk/c0t5d0

of=/dev/null bs=1024k and display the following error

when complete.

dd read error: I/O error
4080+0 records in
4080+0 records out



Now the /dev/vg00/lvol7 is mounted as /usr.


As the disk was faulty and was giving I/O error, the

mirroring process also not complete.
So at this moment the disk(c0t5d0) cannot be replaced

direclty because in that case we may be in the postion

of losing data.

Can anybody suggest what needs to be done now.

[Bill Hassell · Accepted solution]

Unfortunately, there is nothing you can do to fix the problem except to replace the bad disks and restore your operating system from your Ignite/UX backup tape. If you have no Ignite tape, you will have to re-install the OS and then reload all your files from your regular backup tapes. If (the worst scenario) you have no backups, you'll have to contact a data recovery company such as OnTrack (www.ontrack.com) to recover the bad disk. Since the process is tedious and requires specialized equipment, it will take several days and will be quite expensive.

[Chan 007]

Hi,

Can you boot it is single user more.
Copy your /etc & /root so that your can try your luck.

Have you tried on ODE
dd if=/dev/rdsk/cxtydz of=/dev/rdsk/cxtyda
bs=1024

If dump works, try your luck.

Best of luck.

Chan

[Ajitkumar Rane]

Amit,

If possible you should add a new disk and add a third mirror copy. Then reduce the mirrors on c0t5d0 and remove the disk from VG00. remember to set the boot disk as well as update the boot/root/dump.... with lvlnboot. Restore the /usr from backups.

hope this helps .

Rgds,

Ajit

PS: Amit please assign points to the members replies

[Arunvijai_4]

Hi Amit,

You need to replace the faulty disks ASAP. Try to do # dd if=/dev/rdsk/cXtYdZ of=/dev/null bs=64K count=1000

-Arun