Should I enable “Patrol Read” on SSD drives

When you open the Dashboard does it say the RAID is doing some Background Operations (Virtual drive operations in progress or Drive operations in progress) or Does the log say operations like Consistency Check started some time before the warning about the Patrol Read and some time after that it (Consistency Check) finished?

Only my guess but: Check your Consistency Check settings (right click on the controller name > Schedule Consistency Check) if it is run continuously (non-stop) or if it runs some time before Patrol Read and it cant finish on time for the Patrol Read to start You can also try to set Patrol Read settings in the raid controller (right click on the controller name > Set Patrol Read Properties) to start/run a day after the consistency check

First off, hypervisors are sometimes referred to as "IO blenders". They make it very hard for any algorithm to predict what they'll do next because they don't let each VM have its own real SCSI disk. Because of this, you definitely don't want straight up read-ahead. I don't know what your system thinks adaptive read-ahead is, but if it's a setting that will detect when sequential reads are being done and conservatively read a little bit ahead, that would probably be fine.

Second, you always want write-back caching if it's in any way possible. It acknowledges writes as soon as they're saved to cache and then destages them to disk as quickly as possible. This is not safe if you lose power to your cache, though. Battery backed up cache is a requirement for write-back caching, if you want to have consistent data when you come back from a power failure.