topic Re: Remove "Ghost" disk from kernel in Operating System - HP-UX

Remove "Ghost" disk from kernel

Henry Goverde — Tue, 25 Jun 2002 15:47:37 GMT

I was able to get the new disk recognized and added to the vg. My only issue now is that the kernel still thinks the "dead disk" is in the system and part of vg00. It will not let me re-mirror the logical volumes.

The lvmtab file only shows the 4 existing disks while SAM volume groups reports 5 disks in vg00. I am assuming that this includes the "dead (and removed) disk.

Is there a way to get the kernel to throw out the "dead disk"?

Thanks in Advance,

Henry

Re: Remove "Ghost" disk from kernel

Christopher McCray_1 — Tue, 25 Jun 2002 15:53:00 GMT

Hello,

Have you tried to unconfigure the disk in sam through disks and file systems --> disk devices?

Select the disk, tab --> actions --> unconfigure.

Does this help??

Chris

Re: Remove "Ghost" disk from kernel

James R. Ferguson — Tue, 25 Jun 2002 15:53:19 GMT

Hi Henry:

Have a look at Technical Knowledge Base document #LVMKBRC00006257, 'Removing a "ghost disk"'.

Regards!

...JRF...

Re: Remove "Ghost" disk from kernel

harry d brown jr — Tue, 25 Jun 2002 15:53:44 GMT

do a man on vgscan

mv /etc/lvmtab /etc/orig.lvmtab
vgscan -a

live free or die
harry

Re: Remove "Ghost" disk from kernel

S.K. Chan — Tue, 25 Jun 2002 16:14:43 GMT

The key to this is to remove the "stale" mirrored copies on the ghost disk first with the "key-value" from lvdisplay output of the LV that is stale.. example ..(lvol2 in vg00)
and

# lvdisplay -v -k /dev/vg00/lvol2
==> the PV column will show you the disk key value (usually 0 or 1)

With that remove the mirrored stale LV (assuming disk key value is 1)

# lvreduce -m 0 -k /dev/vg00/lvol2 1

Final steps ..
# cd /etc
# mv lvmtab lvmtab.org
# vgscan ???v
# vgchange -a y vg00
--> reactivate vg00
# vgreduce -f vg00
--> force removal of the ghost disk

Re: Remove "Ghost" disk from kernel

Sanjay_6 — Tue, 25 Jun 2002 16:21:32 GMT

Hi Henry,

Try this link,

{note: contract customer link removed by moderator}

Hope this helps.

Regds

Re: Remove "Ghost" disk from kernel

Henry Goverde — Tue, 25 Jun 2002 16:22:20 GMT

Hi,

The vgscan -a doesn't change a thing. lvmtab reports 4 disks and SAM reports 5. I haven't been able to locate the document for removing a ghost disk.

Thanks for your input. If you have any more suggestions they will be appreciated.

Thanks,

Henry

Re: Remove "Ghost" disk from kernel

James R. Ferguson — Tue, 25 Jun 2002 16:26:51 GMT

Hi Henry:

For full access to the Knowledge Base, you must have a support agreement and you must login to the ITRC. When you meet these criteria, be sure to select the "by DocID" from the dropdown box to the left of the search criteria.

Regards!

...JRF...

Re: Remove "Ghost" disk from kernel

Henry Goverde — Tue, 25 Jun 2002 16:46:22 GMT

Thanks a bunch. Looks OK through SAM as well now. I'll try my re-mirroring tonight.