need to replace bad disk in mirror

[Deepak Kr]

William,

Once you replace the faulty disk successfully, follow these steps:

#ioscan -funC disk|more
new disk should recognised here!!

#pvcreate -f -B /dev/rdsk/c_t_d0

#vgcfgrestore -n vgname /dev/rdsk/c_t_d0

# vgchange -a y /dev/vgname

# vgsync vgname

check mirror status after vgsync is completed!!

[Torsten.]

@Kumar Deepak

why using "pvcreate -B ..." on a non-boot disk?

[William Capen]

Are we using the same device name? The dead device is c4t4d0 so the restore should be done to the same device or should I look for a new one?

[Patrick Wallek · Accepted solution]

The device file name should be the same.

If it is not currently showing up in ioscan, then what you should do is:

1) Replace the disk
2) ioscan -fnC disk
to make sure you see it. If the device file names are not showing up, then do
2a) insf -eC disk
to create the device files
2b) ioscan -fnC disk
to make sure the device files are now showing up in ioscan
3) pvcreate
4) vgcfgrestore
5) vgchange -a y vg??
6) vgsync

[Torsten.]

With hp-ux 11.23 and a plain SCSI controller the device file will remain the same.

This could be different with 11.31 or SAS controllers, but you don't have this.

[Deepak Kr]

sorry for typo:

why using "pvcreate -B ..." on a non-boot disk?

pvcreate -f disk

[Torsten.]

Even this is not needed.

The "-f" is dangerous, if you use a wrong disk device file by accident.

The vgcfgrestore will do the same and more as the pvcreate - so pvcreate is not needed.

;-)

[William Capen]

so once I run

ioscan -fnC disk
and
insf -eC disk

and the new device is seen by the system, I only need to do

vgcfgrestore -n vg01 /dev/rdsk/c4_t4_d0

vgchange -a y /dev/vg01

vgsync vg01

That's it?

[Patrick Wallek]

Yep, that should work.

[William Capen]

YEA!!!!! I'm back! That was very scary due to the extreme importance of the file system but it worked! Thanks to ALL of you for your help!

Bill