Western Digital Caviar 120GB 7.2K EIDE Hard Drive WD1200BB
Interface : 40-pin EIDE
Actuator Type : Rotary Voice Coil
Number of Disks : 2
Data Surfaces : 4
Number of Heads : 4
Bytes Per Sector : 512
User Sectors Per Drive : 234,441,648
Servo Type : Embedded
Recording Method EPR4 : Rate 16/17 PRML
ECC : Reed Solomon
Head Park 2 : Automatic
Average Seek 1 - Read - Write : 8.9 ms average 10.9 ms average
Track-to-Track Seek : 2.0 ms average
Full Stroke Seek : 21 ms average
Index Pulse Period : 8.3 ms (nominal)
Average Latency : 4.2 ms (nominal)
Rotational Speed : 7200 RPM (nominal)
Data Transfer Rate (maximum) : 100 MB/s (Mode 5 Ultra ATA) 66.6 MB/s (Mode 4 Ultra ATA) 33.3 MB/s (Mode 2 Ultra ATA) 16.6 MB/s (Mode 4 PIO) 16.6 MB/s (Mode 2 multi-word DMA)
Interleave : 1:1
Buffer Size : 2 MB
Error Rate - Unrecoverable : <1 in 10 14 bits read
Spindle Start Time - From Power-on to Drive Ready 2 - From Power-on to Rotational Speed 3 : 7.0 s average 5.0 s average
Spindle Stop Time : 6.5 s average
Contact Start/Stop Cycles (CSS) : 50,000 minimum


