RAC & Failsafe :: Changing Disk Paths In ASM


We are about to undertake a storage migration of our RAC environment from EMC to XIV storage.

The migration method we are using means that we will be presented with identical disks post the migration, however the UNIX paths to the disk devices will be changing. Using our migration method it is not possible to present the old and new devices at the same time.

Therefore once the migration is complete i need to update the device configuration to reflect the new paths. I believe this is done using the following techniques but I am unsure as some of the documentation is ambiguous and I have not done this before

Changing path to Voting Disks

crsctl add css votedisk <new_path_to_disk> -force
crsctl delete css votedisk <old_path_to_disk> -force

Changing path to OCR Disks

ocrconfig repair ocr <new_path_to_ocr>
ocrconfig repair ocrmirror <new_path_to_ocrmirror>

Changing paths to ASM disks

alter system set asm_diskstring='<new_device_path>' scope=both;