Feature	Specification
Physical Layout
Label Capacity	250 GB
Bytes per Sector	512
Sectors per Track	630-1296
Number of Heads	4
Number of Disks	2
Data Sectors per Cylinder	2520-5184
Data Cylinders per Zone	1810-8341
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
Performance
Data Transfer Rates	843.2 Mbps
Interface Transfer Rates	133 Mb/s
Data Buffer Size	8192 KB
Rotational Speed	7200 RPM
Number of Buffer Segments (Read)	Up to 128
Number of Buffer Segments (Write)	Up to 63
Recording Density	767.7 Kbpi max
Track Density	120 TPI
Areal Density	92.1 Gbits/in2 max
Number of Data Bands	30
Command Overhead (Drive in Quiescent State)
Read (Cache Not Hit) (From Command Write to Seek Start)	0.3 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)	0.3 ms typ
Mechanical Positioning
Average Seek Time (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
Head Switch Time	1.4 ms typ
Average Latency	4.17 ms
Drive Ready Time	8 ms typ 20 ms max
Data Transfer Speed	Disk-Buffer transfer (Zone 0): Instantaneous: 79.6 Mbytes/sec typ Sustained (read): 67.8 Mbytes/sec typ Disk-Buffer transfer (Zone 29): Instantaneous: 38.7 Mbytes/sec typ Sustained (read): 32.9 Mbytes/sec typ Buffer (host): 133 Mbytes/sec max
Random Access (Read)	54.6 sec typ 57.2 sec max
DC Power Requirements
+5 Input Voltage	During run and spin up: 5 V ? 5% Absolute max spike voltage: ?0.3 to 7 V Supply rise time: 0 to 5 sec
+12 V Input Voltage	During run and spin up: 12 V + 10%?8% Absolute max spike voltage: ?0.3 to 15 V Supply rise time: 0 to 5 sec
Power Supply Current (Typical)	Function +5 V +12 V Total Idle average: 280 mA 320 mA 5.24 W Low RPM idle 160 mA 160 mA 2.72 W Unload idle average 160 mA 270 mA 4.04 W Random R/W average 500 mA 600 mA 9.70 W Start up (max) 900 mA 1880 mA NA Standby average 150 mA 15 mA 0.93 W Sleep average 100 mA 15 mA 0.68 W Notes: Hitachi Gateway Part Numbers 105094 compatible with the following Models: GM5014B Media Center Computer, GM5045E Media Center Computer, GM5045H Media Center Computer, GM5067H Media Center Computer, GT5028 Media Center Computer, GT5032 Media Center Computer, GT5056 Media Center Computer, GT5056H Media Center Computer, GT5058 Media Center Computer