topic new disk in array in Operating System - HP-UX

new disk in array

Ceesjan van Hattum — Mon, 22 Jul 2002 13:30:41 GMT

Hi,
I want to add a disk to my array and use it as an extra mirror on vg00.
'ioscan' sees the disk.
'pvcreate -B' does NOT work:
PV already belongs to a volume group.
'pvremove' : PV belongs to an exported volume group

But really, none of my 2 volumegroups includes the disk: vgdisplay -v /dev/vg0[0|1] | grep dsk

So.. i tried to clean the disk, because i do not know the data on this disk:
dd if=/dev/null of=/dev/rdsk/c0t3d0 bs=1024k
0+0 records in; 0+0 records out...
No effect on the needed pvcreate -B...

What do i not see, what my system does.. :(

Re: new disk in array

Martin Johnson — Mon, 22 Jul 2002 13:33:04 GMT

Try "pvcreate -f -B".

HTH
Marty

Re: new disk in array

melvyn burnard — Mon, 22 Jul 2002 13:33:24 GMT

try using pvcreate -f -B

see what that does.
else try
dd if=/stand/vmunix of= bs=10k

Re: new disk in array

Stefan Farrelly — Mon, 22 Jul 2002 13:33:29 GMT

Just pvcreate -f your disk first. Your dd was a good idea but you need a count=100 on the end of it - pvcreate -f does the same thing.

Re: new disk in array

Jeff Schussele — Mon, 22 Jul 2002 13:34:27 GMT

Hi Ceesjan,

Do a
#pvcreate -f /dev/rdsk/cxtydz
before the
#pvcreate -B /dev/rdsk/cxtydz

I *think* you can do them on the same line, -f first, but I'm not positive.

HTH,
Jeff

Re: new disk in array

Sanjay_6 — Mon, 22 Jul 2002 13:34:37 GMT

Hi,

when you do an ioscan, are the device files seen. If not, then do "insf -e" to recreate the device files. Once done, see if the disk is sensed properly "diskinfo -v /dev/rdsk/cxtydz". If the disk is seen correctly, do a pvcreate and vgextend/vgcreate.

Hope this helps.

Regds

Re: new disk in array

James R. Ferguson — Mon, 22 Jul 2002 13:35:32 GMT

Hi:

If you 'vgexport' a volume group with the intention of destroying it, the LVM information is still intact on the physical disk volumes that belonged to it. Therefore, you will need to do a forced 'pvcreate' to overwrite it:

# pvcreate -f /dev/rdsk/cXtYdZ

Make very sure that you know that this is a disk that you want to overwrite.

Regards!

...JRF...

Re: new disk in array

Ceesjan van Hattum — Mon, 22 Jul 2002 13:35:45 GMT

The -f did the trick. I should RTFM...
THANKS all. Case closed.
Regards,
Ceesjan