Feature	Specification
Physical Layout
Label Capacity	250 GB
Bytes per Sector	512
Sectors per Track	567-1170
Number of Heads	6
Number of Disks	3
Data Sectors per Cylinder	3402-7020
Data Cylinders per Zone	1500-5000
Logical Layout
Number of Heads	16
Number of Sectors per Track	63
Number of Cylinders	16 383
Number of Sectors	488 397 168
Total Logical Data Bytes	250 059 350 016
Mechanical Positioning Performance
Data Transfer Rates	757 Mbps
Interface Transfer Rates	100 Mb/s
Data Buffer Size	8192 KB
Rotational Speed	7200 RPM
Number of Buffer Segments	Read: Up to 128 Write: Up to 63
Recording Density	689 Kbpi max.
Track Density	90/93.5 TPI
Areal Density	62 Gbits/in2 max.
Number of Data Bands	30
Command Overhead (Drive is in Quiescent State)
Read (Cache Not Hit)	From Command Write to Seek Start: 0.5 ms typ.
Read (Cache Hit)	From Command Write to DRQ: 0.1 ms typ.
Write	From Command Write to DRQ: 0.015 ms typ.
Seek	From Command Write to Seek Start: 0.5 ms typ.
Average Seek Times (Including Settling)
Read	8.2 ms typ. 9.2 ms max.
Write	9.2 ms typ. 10.2 ms max.
Read (Quiet Seek mode)	19.5 ms typ. 20.5 ms max.
Write (Quiet Seek mode)	20.5 ms typ. 21.5 ms max.
Full Stroke Seek Time (Without Command Overhead Including Settling)
Read	14.7 ms typ. 17.7 ms max.
Write	15.7 ms typ. 18.7 ms max.
Read (Quiet Seek mode)	32.5 ms typ. 35.5 ms max.
Write (Quiet Seek mode)	33.5 ms typ. 36.5 ms max.
Single Track Seek Time (Without Command Overhead Including Settling)
Read	0.8 ms typ. 1.5 ms max.
Write	1.3 ms typ. 2.0 ms max.
Read (Quiet Seek mode)	0.8 ms typ. 1.5 ms max.
Write (Quiet Seek mode)	1.3 ms typ. 2.0 ms max.
Other
Average Latency	4.17 ms
Drive Ready Time	10 ms typ. 31 ms max.
Data Transfer Speed	Disk-Buffer Transfer (Zone 0): Instantaneous: 72.1 Mbytes/s typ. Sustained - read: 61.4 Mbytes/s typ. Disk-Buffer Transfer (Zone 29): Instantaneous: 34.9 Mbytes/s typ. Sustained - read: 29.7 Mbytes/s typ. Buffer - host: 150 Mbytes/s max
Electrical
Input Voltage Supply	+5 V +12 V
During Run and Spin Up	5 V ±5% 12 V +10% ?8%
Absolute Max Spike Voltage	?0.3 to 7 V ?0.3 to 15 V
Power Supply current (typical)	Mode +5 V (mA) +12 V (mA) Total (W) Idle average 400 470 7.6 Low RPM idle 230 180 3.3 Unload idle average 230 350 5.4 Random R/W average 540 660 10.6 Silent R/W average 570 470 8.5 Start up (max.) 960 1840 NA Standby average 230 20 1.4 Sleep average 190 20 1.2 Notes: 250GB 7200 RPM Serial ATA Hard Drive with 8MB Cache - Hitachi - Deskstar 7K250-250 Hitachi Part Numbers HDS722525VLSA80 compatible with the following Models: 7310X Desktop Computer, DX200QS Desktop Computer, DX210S Desktop Computer, DX210X Desktop Computer, DX310S Desktop Computer, DX310X Desktop Computer, E-2500D Desktop Computer, E-2500D SB Desktop Computer, E-2500S Desktop Computer, E-2500S SB Desktop Computer, E-2600D Desktop Computer, E-2600D SB Desktop Computer, E-2600S Desktop Computer, E-2600S SB Desktop Computer, E-4300 4-Bay Computer, E-4300 4-Bay SB Computer, E-4300 6-Bay Computer, E-4300 6-Bay SB Computer, E-4500D Computer, E-4500D SB Computer, E-4500S Desktop Computer, E-4500S SB Desktop Computer, E-6500D Computer, E-6500D SB Computer, FX400MC Media Center Desktop Computer, FX400S Desktop Computer, FX400X Desktop Computer, FX400XL Desktop Computer, S5200D Computer, S5200S Computer, S5600D Computer