Gateway P-171X 250 GB 5400 RPM Serial ATA Hard Drive 2528171RSize250 GBInterfaceSATA 1.5 Gb/sActuator typeRotary voice coilNumber of disks2Data surfaces4Number of heads4Bytes per sector512User sectors per drive488,397,168Servo typeEmbeddedRecording methodPartial DC TargetECCReed-SolomonAverage seek Read12 ms (average)Average seek Write13 ms (average)Track-to-track seek2.0 ms (average)Full stroke seek21 ms (average)Index pulse period11.1 ms (nominal)Average latency (msec)5.5Rotational speed5,400 RPMData transfer rateBuffer to host: 1.5 Gb/s maximumBuffer to disk: 850 Mbits/s maximumInterleave1:1Buffer size 8 MBError rate (non-recoverable)<1 in 1014 bits readSpindle start timePower-on to drive ready: 4.0s averagePower-on to rotational speed: 3 2.0s averageSpindle stop time5.1s averageLoad/Unload cycle600,000Power requirement5 VTemperature Operating: 0 to 60° C (32 to 140° F)Non-operating: -40 to 65° C (-40 to 149° F)Humidity Operating: 8 to 90° RH non-condensingNon-operating: 5 to 95° RH non-condensingShock Operating: 2 msec (Gs): 300GNon-operating: 1 msec (Gs): 900GHeight9.5 millimeters ( .374-inches)Width69.85 mm (2.75-inches)Depth100 mm (3.945-inches)Weight99 grams (0.22 pounds)