Controlling the speed of RAID operations

RAID operations you can control

You can control the speed of the following RAID operations with RAID options:

RAID data reconstruction
Disk scrubbing
Plex resynchronization
Synchronous mirror verification

Effects of varying the speed on storage system performance

The speed that you select for each of these operations might affect the overall performance of the storage system. However, if the operation is already running at the maximum speed possible and it is fully utilizing one of the three system resources (the CPU, disks, or the FC loop on FC-based storage systems), changing the speed of the operation has no effect on the performance of the operation or the storage system.

If the operation is not yet running, you can set a speed that minimally slows storage system network operations or a speed that severely slows storage system network operations. For each operation, use the following guidelines:

If you want to reduce the performance impact that the operation has on client access to the storage system, change the specific RAID option from medium (the default) to low. This also causes the operation to slow down.
If you want to speed up the operation, change the RAID option from medium to high. This might decrease the performance of the storage system in response to client access.

Detailed information

The following sections discuss how to control the speed of RAID operations: