Some of Important HDD spec

Enterprise HDD

Rotational Speed 10K~15K

Error Rate (non-recoverable, bits read) 1 sector per 10E16
Mean Time Between Failures (MTBF, hours) <2M
Availability (hrs/day x days/wk) 24x7

Rotational Speed 7200

Error Rate (non-recoverable, bits read) 1 sector per 10E15
Mean Time Between Failures (MTBF, hours) >1.2M
Availability (hrs/day x days/wk) 24x7

there are 3 differents sector size in seagate product