topic Re: HPUX 11:00: Max Number Of Disks Per Volume Group in Operating System - HP-UX

HPUX 11:00: Max Number Of Disks Per Volume Group

LG Porter — Tue, 14 May 2002 14:28:10 GMT

IS there a max number of physical disks that can be added to a volume group? If so, can it be changed or require a kernel re-configuration?

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Pete Randall — Tue, 14 May 2002 14:30:37 GMT

See:http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xbf6242308663d611abdb0090277a778c,00.html

Pete

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Sandip Ghosh — Tue, 14 May 2002 14:31:24 GMT

You can always increase the No. of PV in a volume group by giving -p option during the VG creation. By default it is 16 , it can be 1 to 255.

Sandip

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Helen French — Tue, 14 May 2002 14:32:38 GMT

Hi Porter:

Yes ! the maximum limit is - 255

The default is 16 ! You can change it through vgcreate -p option. No need to change anything with Kernel. Check man vgcreate for more details.

HTH,
Shiju

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Patrick Wallek — Tue, 14 May 2002 14:34:25 GMT

Have a look at 'man vgcreate' specifically the -p option.

The default max # of PVs (physical volumes or disks) in a VG is 16. If you specify the -p option to vgcreate when you create the VG, you can specify a number from 1 to 255.

If you create the VG from within SAM, you should be able to change it by selecting the 'Modify Default Volume-Group Options...' button.

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Victor_5 — Tue, 14 May 2002 14:34:28 GMT

max is 255, default is 16, you can specify it when you create vg, use -p option, man vgcreate for details.

After you created vg, you can not change it unless you re-create vg, so plan in advance before you create a new vg.

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Victor_5 — Tue, 14 May 2002 14:35:49 GMT

One more post fyi.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xbf6242308663d611abdb0090277a778c,00.html

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

James R. Ferguson — Tue, 14 May 2002 14:41:59 GMT

Hi:

The man pages for 'vgcreate' offer an excellent view of the parameters related to volume groups, their defaults and their limits. In addition to 'max_pv', 'max_pe', 'max_lv' and 'pe_size' are fixed at the time a volume group is created, and cannot be changed. Plan ahead accordingly.

Regards!

...JRF...

Re: HPUX 11:00: Max Number Of Disks Per Volume Group

Johannes Seippel — Wed, 15 May 2002 05:47:17 GMT

see also Document KBRC00004285 (RCEN/English/200000060285366)