Coverting root disk from LVM to VxVM

[santosh jha]

I am trying to convert my root disk from LVM to VxVM but the process is failing withe following error
"vxcp_lvmroot 14:42: Copying /dev/vg00/lvol5 (vxfs) to /dev/vx/dsk/rootdg/tmpvol
vxfs fsck: fsck read failure bno = 104, off = 0, len = 32768
vxcp_lvmroot: ERROR: Attempting fsck on /dev/vx/rdsk/rootdg/tmpvol"

I tried running fsck by going to single user mode .Please guide

[Arunvijai_4]

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=961311
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=38058
http://docs.hp.com/en/B7961-90017/ch02s02.html

Check these links, it provides good info/

-Arun

[santosh jha]

Anyone please help me.

[Duncan Edmonstone]

Do you really need a /tmp while doing the conversion? If there's a bit of free space in / then why not just umount and lvremove the /tmp volume, then re-create once you have converted to VxVM?

HTH

Duncan

[Duncan Edmonstone]

Think about this a bit more, if you have run fsck OK in single user mode, this suggests the problem is probably related to something that is writing to the /tmp file system during the conversion.

If thats the case, removing the /tmp filesystem might just move the problem to /.

Another couple of ways you might be able to sort this out:

1) Use 'fuser -c /tmp' to figure out whats writing to the filesystem, and stop as much as you can.

2) temporarily remount the /tmp filesystem with full intent logging enabled ('man mount_vxfs' for details). This might give the fsck the extra metadata it needs to work.

HTH

Duncan

[santosh jha]

Thx for the reply DUNCAN.

I tried vxcp while /tmp was unmounted.But the problem is still the same.

Regards
Santosh

[Ralph Grothe]

Just googled this doc that describes rootability issues with VxVM on HPUX.

http://docs.hp.com/en/5187-2239/ch04s05.html

So far I didn't even know whether HPUX has embedded VxVM as much yet to provide for rootibility.

My only experience with VxVM rootability are with the Solaris OS.
From this I can say that rootability isn't that trivial and might cause some trouble (at least considerable more thoughts) in disaster recovery scenarios.

[Duncan Edmonstone · Accepted solution]

Ralph,

don't let your experience with Slowaris effect your thinking on this! VxVM root/boot isn't that different from LVM root/boot on HP-UX and is integrated much better than it ever was on Sun - which is funny when you consider how popular VxVM is on their OS.

HTH

Duncan

[santosh jha]

It is still failing .Now i doubt that there is a bad sector on the disk.

How can i quickly check this ?

Santosh Jha

[Bharat Katkar]

# dd if= of=/dev/null bs=1024

This will return an error if bad block is found.

Regards,

[santosh jha]

Hey Bharat , R u from veritas.

[Bharat Katkar]

No....
Regards,
Bharat