You can reduce the impact of RAID operations on system performance by decreasing the speed of the RAID operations.
You can control the speed of the following RAID operations with RAID options:
- RAID data reconstruction
- Disk scrubbing
- Plex resynchronization
- Synchronous mirror verification
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 disk-to-controller connection bandwidth), 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 on client access to the storage system, change the specific RAID option from medium to low. Doing so also causes the operation to slow down.
- If you want to speed up the operation, change the RAID option from medium to high. Doing so might decrease the performance of the storage system in response to client access.