Disk speeds

Disk speeds are measured in revolutions per minute or RPM. It is best to use disks of the same speed in an aggregate. Faster disks provide more disk input/output operations per second (IOPS) and faster response time.

Data ONTAP supports the following speeds for disk drives:

• FC disks
  • 10K RPM
  • 15K RPM
• ATA disks
  • 5.4K RPM
  • 7.2K RPM
• SAS disks
  • 15K RPM
• SATA disks
  • 7.2 RPM

For more information about supported disk speeds, see the System Configuration Guide. For information about optimizing performance with 15K RPM FC disks, see Technical Report 3285 at http://www.netapp.com/library/tr/3285.pdf