Moving Storage to a Disaster Recovery Room

[Pedro Cirne]

Hi,

I have two Symmetrix storages on the same room and I'm planning the move of one to a DR room.

Most of the volumes are replicated with SRDF between storages and EMC engineers will take care of them..

My concern is with a few volumes that are replicated between storages using HP-UX LVM Mirror.

I must be sure that:

-I have no impact on my servers, they are running critical applications

-I can easily rebuild/synchronize the mirror when the DR storage comes on-line.

What's the best approach to achieve this smoothly?

Thks,

Pedro Cirne

[Steven E. Protter]

lvsplit can break the mirrors prior to movement.

mirror/ux only.

check configuration of logical volumes with:

lvdisplay -v /dev/vg01/lvolname | more

use a real logical volume name.

Your mirrors should be evenly distributed over the two storage devices. If not, you may need to rebuild them or simply break them and rebuild them after the move.

SEP

[Zeev Schultz]

>> I must be sure that:

>> -I have no impact on my servers, they are running critical applications

>> -I can easily rebuild/synchronize the mirror when the DR storage comes on-line.


http://docs.hp.com/en/6430/LVM_OLR_whitepaper.pdf

page 5 :
"Halting applications and unmounting file systems is only necessary when the data is not mirrored or the mirrors have been compromised."

page 7 :
"If there are mirrored logical volumes residing on the disk, LVM will automatically
synchronize the data on the disk with the available mirror copies on other disks in the
volume group."