mirroring outside the primary volume group while using extent based stripping

[Tony Escujuri_1]

Hi all,

Is it possible to mirror data that is on 2 Volume Groups (vg03 and vg04) being extent based stripped and mirrored to disk that are appart of just one of the volume groups.

We used this document in reference to the extent based stripping.
DocId: KBAN00000138


Let me know if more information is required for a solid answer.

Thanks and Best Regards,
Tony Escujuri
tony@unixadm.net

[Patrick Wallek · Accepted solution]

No you can't mirror BETWEEN VGs. Mirroring is done at the LV level within a specific VG only.

Mirroring data from VG03/LVOL3 to VG04/LVOL3 will NOT work.

Sorry.

[Darrell Allen]

Hi Tony,

Sorry, MirrorDisk/UX only mirros LVs within the same Volume Group.

However, and possibly leading to the confusion, to use extent based striping you must have the disks in the Volume Group allocated to separate Physical Volume Groups. You create PVGs simply by editing /etc/lvmpvg.

The doc id you reference should be quite helpful.

Darrell

[James R. Ferguson]

Hi Tony:

No. HP-UX mirroring is implemented at the logical volume level. Since a logical volume is unique within a volume group, a logical volume could not be mirrored to two (or more) volume groups.

Regards!

...JRF...