We have a typical RAID 10 (2+2) configuration with 4 HDD on one of our production database server where I observed in perfmon for the drive which is configured with RAID 10 configuration.
Avg. Disk Read Queue Length - 12.51
Avg. Disk Write Queue Length - 0.06
Somewhere I read , I should divide these figures with the no of spindles. Now the question is , should I divide these values by 4 or 2 and what should I interprete from these values ?