Enterprise-class versus Desktop-class Hard Drives

Revision 1.0

Drive Comparison Table

Feature Enterprise Desktop

Performance

Latency and Seek Time 5.7 msec @ 15K rpm 13 msec @ 7200rpm (or slower)

Command Queuing and

Reordering Full Limited

Rotational Vibration

Tolerance Up to 21 rads/sec/sec Up to 5 to 12 rads/sec/sec

Typical I/Os per sec/drive

(no RV) 319 77

Typical I/Os per sec/drive

(20 rad/sec/sec RV) 310 <7

Duplex Operation Full Half

Customization

FW Code Extensive Limited

Variable Sector Sizes Yes (SCSI/SAS only) No

LEDs Yes No

Reliability

MTBF

1.2M hours at 45 degrees C,

24X7 100% duty cycle.

700K hours at 25 degrees C and 8X5,

10%-20% duty cycle

Internal Data Integrity

Checks End to End Limited, none in memory buffer

Maximum Operating

Temperature ~60 degrees C ~40 degrees C

Warranty ~5 years ~1 to 3 years

Note: Typical MTBF, operating temperature, and operating rotational vibration vary depending

on the manufacturer.