Flash System Pools Identification and Conversion

Question

Hi All. Is there a way to identify if the Flash System Pool is Standard or DRP. When we run "lsmdiskgrp" command, we do see lots of info but not that clear. And, in GUI, Pool properties, it does shows compression/dedup and savings etc, so for sure it seems a DRP Pool. But want to confirm. As it also shows FCM (disks) hardware level savings. We know that FCM's hardware compression is enabled by default. Deduplication is a pool level configuration and if the customer wants higher performance, it should not be enabled. So, 2nd part of the query is - Can we convert the Pool from DRP to Standard Online. I believe not possible to do it online. And, without any free disks there, will be a tough ask. Any way do accomplish it with some mirroring etc or some other way. Please advise on this. Thank You.

Accepted Answer

Hi!

Use "lsmdiskgrp 0" if your primary pool ID is 0. It will provide readable output, including a "data_reduction" line. If it says "yes," then it's DRP.
Also, you cannot convert the pool. If you have separate disks, create a standard pool and use addvdiskcopy for your DRP volumes. Choose a standard pool for the copies. After synchronization is complete, delete the DRP pool copy of the volume.

IBM FlashSystem