how do i know my secondary boot disk is good

[Deepak Seth_1]

thanks everybody for the quick replies. I had no luck with my secondary boot disk. This is what i finally did

- tried the secondary , didn't work.
- i was able to bring back my failed drive for enough time to redo the mirroring again to my alternate .
- tried alternate disk and it worked.
- reduce the bad drive .
- insert the new drive .
- it start complaining about missing many files . don't know why even though i mirrored my alternate completly .
- finally restoring the data for /usr / and many other vg00 FS .
But still don't know where did i went wrong in mirroring .

[Patrick Wallek]

>>But still don't know where did i went wrong in mirroring .

Well, since you didn't provide any details as to HOW you did the mirroring, we can't be of much help.

[Suraj K Sankari]

Hi,
Ifu didnt get any error in syslog.log that means your disk is good more over you want to check then use the

dd command

Suraj

[Deepak Seth_1]

steps were
pvcreate -B
vgextend
mkboot -a "hpux"....
lvextend -m 1 [1-10]
lvlnboot -R /dev/vg00
lvlnboot -v
setboot
add to /stand/bootconf

what iam thinking is that when i mirrored by secondary disk from bad disk (which was ok for little while) probably got lots of stale extents and they probably got missed out .

what i did
- primary failed.
- secondary failed to boot.
- hard reset bring back the primary up for little bit . enough for me to do mirroring to non-working seconday follow above step.
- tried seconday. i worked.
- reduce the primary mirror.
- put the new drive .
- errors started - complaining about missing lots of files.
- i have to restore them from backup.

this means something didn't went right while doing the mirroring from bad disk to secondary.