Use the volume modify and volume show commands to manage read reallocation.
|If you want to...||Use this command...|
|Enable read reallocation on a volume||volume modify with the -read-realloc parameter set to on or space-optimized
Note: space-optimized conserves space if you have Snapshot copies, but it can result in degraded read performance of Snapshot copies. space-optimized also rearranges the shared blocks in a deduplicated volume, where as on does not.
|Disable read reallocation on a volume||volume modify with the -read-realloc parameter set to off|
|Identify whether read reallocation is enabled or disabled on volumes||volume show -fields read-realloc|
For more information, see the man pages.