Western Digital WD2500JB Special Edition EIDE / ATA / PATA Hard Disk Drives
Interface : 40-pin EIDE
Actuator Type : Rotary Voice Coil
Number of Disks : 3
Data Surfaces : 6
Number of Heads : 6
Bytes Per Sector : 512
User Sectors Per Drive : 488,397,168
Servo Type : Embedded
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)
Buffer Size : 8 MB
Data Transfer Rate (maximum) - Buffer to Host - Buffer to Disk : 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) 748 Mbits/s maximum


