topic disk questoin in Operating System - HP-UX

disk questoin

navin — Fri, 13 Feb 2009 22:01:14 GMT

i have an ia server - needs disk replacement.the new disk needs to be formatted ?
thanks

Re: disk questoin

Andrew Rutter — Fri, 13 Feb 2009 22:55:53 GMT

hi,

we dont format disks as such in hpux. If the disk was previously used in another system and needs preparing we use pvcreate -f command

#pvcreate -f /dev/rdsk/cxtxdx

see the man pages

http://www.docs.hp.com/en/B2355-90692/pvcreate.1M.html

Andy

Re: disk questoin

navin — Fri, 13 Feb 2009 23:12:11 GMT

do the sas disk need to be partitioned?

Re: disk questoin

Andrew Rutter — Fri, 13 Feb 2009 23:22:07 GMT

hi,

only if its a root disk, then it will need partitioning with idisk commands.

see this excellent doc for replacing disks

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf

Andy

Re: disk questoin

Robert-Jan Goossens — Fri, 13 Feb 2009 23:23:41 GMT

Navin,

Have a look at this doc.

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf

Regards,
Robert-Jan

Re: disk questoin

Johnson Punniyalingam — Sat, 14 Feb 2009 04:23:22 GMT

have an ia server - needs disk replacement.the new disk needs to be formatted ?

NO NEED,

pvcreate -f /dev/rdsk/cxtxdx

You can follow
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf
(Reason for posting the link , above link very solid and explains all you question and gives idea ,.prior you perform the activity

Thanks,
Johnson

Re: disk questoin

sujit kumar singh — Sat, 14 Feb 2009 11:03:55 GMT

Hi
pvcreate on a disk is enough so as to make that usable as a new disk to be put in a VG and start using with the LVM. This craetes the ncecessary LVM Structures in the LVM information area so that the LVM metadata can be kept in there.

For a low-level foramt of the disk "mediainit" command was used, but now the use of this command is not reqd at all and not at all suggested.
the New disks that come are themselves factory initialised, just put them in , do a pvcreate (or vgcfgrestore as in reqd in case yiy are replacing the disk) and start using with the LVM.

regards
sujit