User Guide

Rotational Speed 7,200 rpm
Logical Blocks 156,301,488
Operating Temperature 41° to 131° F (5° to 55° C)
3.5” 7200 RPM Serial
ATA Hard Drives
500 GB Capacity 500,107,862,016 bytes
Height 1 in (2.54 cm)
Width Media diameter: 3.5 in (8.89 cm)
Physical size: 4 in (10.2 cm)
Interface Serial ATA (3.0 Gb/s)
Synchronous Transfer Rate
(Maximum)
Up to 3 Gb/s
Buffer 16 MB
Seek Time (typical reads,
includes controller
overhead, including
settling)
Single Track 2.0 ms
Average 11 ms
Full-Stroke 21 ms
Rotational Speed 7,200 RPM
Logical Blocks 976,773,168
Operating Temperature 41° to 131° F (5° to 55° C)
250 GB Capacity 250,059,350,016 bytes
Height 1 in (2.54 cm)
Width Media diameter: 3.5 in (8.89 cm)
Physical size: 4 in (10.2 cm)
Interface Serial ATA (3.0 Gb/s)
Synchronous Transfer Rate
(Maximum)
Up to 3 Gb/s
Buffer 8 MB
Seek Time (typical reads,
includes controller
overhead, including
settling)
Single Track 1.0 ms
Average 8.5 ms
Full-Stroke 18 ms
Rotational Speed 7,200 RPM
Logical Blocks 488,397,168
Operating Temperature 41° to 131° F (5° to 55° C)
160 GB Capacity 160,041,885,696 bytes
Height 1 in (2.54 cm)
Width Media diameter: 3.5 in (8.89 cm)
Physical size: 4 in (10.2 cm)
Interface Serial ATA (3.0 Gb/s)
Synchronous Transfer Rate
(Maximum)
Up to 3 Gb/s
Buffer 8 MB
QuickSpecs
HP Compaq dc7900 Business PC
Technical Specifications - Hard Drives
DA - 13029 Worldwide QuickSpecs — Version 9 — 1.9.2009 Page 35