
Hard Drive Bible Notes
Never install 7,200 RPM drives as OS or Database Drives Never create a 3 Drive RAID 5 (Even with 15k Drives) Never create a 4 Drive RAID 5 with a host spare (This is a 3 Drive RAID 5) Never create a 4 Drive RAID 5 with 10k or 7.2k Drives Always opt for 3.5” drives over 2.5” drives (3.5” 15k drives cost the same as 10k) 5K Drives are 10% faster than desktop drives, 0K drives are only 0% faster Always add all Disks to your RAID then create LUNS to partition the data IOPs = ((RPM/1000)/(Latency*Seek))*SPINDLE COUNT