Gateway 40GB 7200 RPM SATA Hard Drive With 2MB Cache - WMEHDS728040PLA320

Feature	Description
Physical Layout
Label Capacity	40 GB
Bytes Per Sector	512
Sectors Per Track	567-1170
Number of Heads	1
Number of Disks	1
Data Sectors Per Cylinder	567-1170
Data Cylinders Per Zone	1444-4501
Logical Layout
Number of Heads	16
Number of Sectors Per Track	63
Number of Cylinders	16 383
Number of Sectors	80 418 240
Total Logical Data Bytes	41 174 138 880
Performance
Data Transfer Rates	757 Mbps
Data Buffer Size	2048
Rotational Speed	7200 RPM
Number of Buffer Segments	Up to 128 (read) Up to 63 (write)
Recording Density	689 Kbpi max
Track Density	87 / 90 / 93 TPI
Areal Density	62 Gbits/in2 max
Number of Data Bands	30
Average Seek Times (Without command overhead including settling)	Read: 8.5 ms typ; 9.5 ms max Write: 9.5 ms typ; 10.5 ms max Quiet Seek mode: Read: 19.5 ms typ; 20.5 ms max Write: 20.5 ms typ; 21.5 ms max
Full Stroke Seek Times (Without command overhead including settling)	Read: 15.1 ms typ; 18.1 ms max Write: 16.1 ms typ; 19.1 ms max Quiet Seek mode: Read: 32.5 ms typ; 35.5 ms max Write: 33.5 ms typ; 36.5 ms max
Environmental
Temperature	Operating: 5C to 55?C Non-operating: ?40C 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 to 3 048 m Non-operating: ?300 to 12 000 m