Dell SAS 5/IR Performance – slow write fix (Enable write caching)
Expand the zip file, run LSIUtil.exe from the windows subfolder.
Select your controller – in my case there was only one. <1 enter>
Select option 21 – RAID actions. <21 enter>
Select option 32 – Change Volume Setting <32 enter>
First prompt is the main one:
Enable write caching: [Yes or No, default is No]
Offline on SMART Data [Yes or No, default is No]
Auto configuration: [Yes or No, default is Yes]
Priority resynch: [Yes or No, default is Yes]
Hot Spare Pools (bitmask of pool numbers): [00 to FF, default is 01]
Then <0 enter> your way out of the utility (take 3 of them).