Copy physical extents from corrupt lvol

[Cresswell Williams]

Hi Experts

I extended a the lvol over to a faulty disk, unkown to me a the time. Did the lvextend, but the extendfs did not complete successfully. The disk failed, now the lvol is corrup.

If i do a lvdisplay on that lvol, it shows my data is still "current", and I have tried all formats of fsck known to man, ut i still cannot mount the lvol.

Now is there a way to copy off all the blocks off the lvol to another location?? I tried dd with no success.

Any ideas???

[Mridul Shrivastava]

>> I extended a the lvol over to a faulty disk, unkown to me a the time. Did the lvextend, but the extendfs did not complete successfully. The disk failed, now the lvol is corrup.

If extendfs failed that means you fs size is still the old one. Then you could try reducing the lvol from that faulty disk and then try mounting the filesystem after fsck.

Another option could be to move the data to another good PV using pvmove.

[Cresswell Williams]

Thanks for your reply.

I used pvmove -n /dev/vg00/lvol6 but it gave me I/O Errors.

How can I restor /opt from the installation media? That seems like a viable option, excuse the pun....hahaha

Thanks in advance

[Mridul Shrivastava]

I don't think that you can recover /opt from installation media since you might have installed new softwares, applications etc after standard installation.

You could try recovery from ignite backup , provided you have one.

[Rasheed Tamton]

If you do not have an ignite or another backup the next possibility is a mirror disk - if you have one. But if you have not removed the mirror before the problem happened then the data might be already synced.

Did you use -o full option of fsck
fsck -F vxfs -o full -Y

man fsck_vxfs