Gateway 250GB 7200 RPM SATA Hard Drive - 102132

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
Mechanical Performance
Data Transfer Rate	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 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
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.
Command Overhead (Drive is in quiescent state)	Read (cache not hit; from Command Write to Seek Start): 0.3 ms typ. 0.3 ms max. Read (cache hit; from Command Write to DRQ): 0.1 ms typ. 0.2 ms max. Write (from Command Write to DRQ): 0.015 ms typ. 0.2 ms max. Seek (from Command Write to Seek Start): 0.3 ms typ. Maximum: not applicable
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.
Drive Ready Time	8 sec. typ. 20 sec. max.
Data Transfer Speed	Disk-Buffer transfer (Zone 0): Instantaneous - typical 79.6 Mbytes/sec Sustained - read typical 67.8 Mbytes/sec Disk-Buffer transfer (Zone 29): Instantaneous - typical 38.7 Mbytes/sec Sustained - read typical 32.9 Mbytes/sec Buffer - host (max) 133 Mbytes/sec
Electrical
Input Voltage	+5 V: During run and spin up: 5 V ± 5% Absolute max spike voltage: ?0.3 V to 7 V Supply rise time: 0 to 5 sec +12 V: During run and spin up: 12 V + 10%?8% Absolute max spike voltage: ?0.3 V to 15 V Supply rise time: 0 to 5 sec
Environmental
Temperature	Operating: 5° C to 55° C Non operating: ?40° C to 65° C
Relative Humidity	Operating: 8% to 90% non-condensing Non-operating: 5% to 95% non-condensing
Maximum Wet Bulb Temperature	Operating: 29.4° C non-condensing Non-operating: 35° C non-condensing
Maximum Temperature Gradient	15° C/hour
Altitude	Operating: ?300 m to 3 048 m Non-operating: ?300 m to 12 000 m
Physical
Dimensions (H × W × L)	Approximately 25.4 mm × 101.6 mm × 146.0 mm
Weight	640 grams maximum
Reliability
Start/Stop Cycles	Minimum of 50 000 start/stop cycles in a 40? C environment Minimum of 10 000 start/stop cycles in extreme temperature or humidity within the operating range
Data Reliability	Probability of not recovering data is 1 in 1014 bits read
Certifications
Safety/Industry Standards	UL CSA TUV CE C-Tick