topic Re: Increasing the size of a striped & mirrored logical volume in Operating System - HP-UX

Increasing the size of a striped & mirrored logical volume

JOE HEPWORTH_4 — Wed, 19 Aug 2009 06:20:00 GMT

I have an rp4440 running HPUX 11.11 that uses three way striping and then mirroring across 6 disks in a named PVG, The volume is becoming full . How do I go about adding extra disks to the vg01 volume group that has these striped volumes ?

I enclose a print of the /etc/lvmpvg file and an lvdisplay of one of the logical volumes

Re: Increasing the size of a striped & mirrored logical volume

Robert-Jan Goossens_1 — Wed, 19 Aug 2009 09:45:22 GMT

Hi Joe,

If you would to keep your current policy/configuration (striping+mirror) intact, you will need to add 6 disks to you volume group vg01 and then extend your /dev/vg01/lvol2 logical volume.

Regards,
Robert-Jan

Re: Increasing the size of a striped & mirrored logical volume

unix adm — Wed, 19 Aug 2009 11:09:42 GMT

hi Joe

your lvdisplay command output does not show any striping , are you sure there are any ?

# lvdisplay -v /dev/vg01/lvol2
Stripes 0
Stripe Size (Kbytes) 0

Thanks and Regards
Rajeev

Re: Increasing the size of a striped & mirrored logical volume

Torsten. — Wed, 19 Aug 2009 11:47:29 GMT

It's not striped, it is distributed.

However, if you want to continue that way you need 6 more disks, if not, you need only 2 but you need to change to non distributed.

Re: Increasing the size of a striped & mirrored logical volume

R.K. # — Wed, 19 Aug 2009 11:56:21 GMT

Hi Joe,

As said you need to add six disks to extend the LV. Three for distributing and three for mirorring them.

Differences between Striped and Distributed layout:
Striped logical volumes:
-Stripe unit = 4K to 32768K
-Can't be mirrored

Distributed logical volumes:
-Stripe unit = 1 extent
-Can be mirrored

Regds..

Re: Increasing the size of a striped & mirrored logical volume

Lijeesh N G_1 — Wed, 19 Aug 2009 13:18:54 GMT

Hi,

How do I go about adding extra disks to the vg01 volume group that has these striped volumes ?
==>Its not striped, its distributed across 3 disks and mirrored to anothere 3 disks. So you have to add 6 disks in order to extend the lvols in this Allocation policy.

Regards,
LIJEESH N G

Re: Increasing the size of a striped & mirrored logical volume

JOE HEPWORTH_4 — Thu, 20 Aug 2009 05:36:57 GMT

Thanks to all who replied