topic Re: Raid 5 Modification in Operating System - HP-UX

Raid 5 Modification

RASE_1 — Wed, 09 Dec 2009 09:08:51 GMT

Dear,

We get a rx2660 server running 11iv2 with several disks with same capacity (146Go) controlled by a raid 1 controler (HPUX Ref AD248A).

Three of them are configured in raid 5 mode (/dev/vg01), and one is alone (static data)(/dev/vg02).
I would like to increase the capacity of /dev/vg01, by deleting /dev/vg02 and adding the 'free' disk to /dev/vg01, to get finally four disks (146Go) in raid 5 mode.

Question:
Is this possible to do it with saconfig tool in live mode (without deleting any data or current raid 5 configuration or stopping the data access) , if yes with which options ?

Regards,

Re: Raid 5 Modification

Torsten. — Wed, 09 Dec 2009 12:21:24 GMT

Can you please provide the output of "sautil" and "saconfig" of this controller?

Re: Raid 5 Modification

RASE_1 — Thu, 10 Dec 2009 12:27:39 GMT

Here are requested information

Regards,

Re: Raid 5 Modification

Torsten. — Thu, 10 Dec 2009 13:11:28 GMT

This should be possible.

Remove vg02 (e.g. vgexport); delete logical drive 2 (disk detail

Participating Physical Disk(s)...... Ct:Enc:Bay:WWID
1I:1:6:0x5000c50006a63a8d

Now add this unused disk to logical drive 1 - online.

Once the disk is added, you can increase the size, e.g.

# saconfig /dev/ciss3 -E 1 -c 100
Logical drive 1 extended from 87.9 GB to 100 GB in capacity

Now you need to adjust LVM structure with vgmodify - this is offline (vg deactivated!)

Re: Raid 5 Modification

RASE_1 — Thu, 10 Dec 2009 16:06:44 GMT

Thanks