Seagate BARRACUDA2 - Manual (Page 16)

14 ST12450W/WD Installation Guide, Rev. B
Characteristics ST12450W/WD
Interface Fast & Wide SCSI-2 1
Cache type
Multi-segmented 1,024 Kbytes
Capacity
Unformatted 2,437 Mbytes
Formatted 2 1,849 Mbytes
Recording
Cylinders (user accessible) 2,710
Heads (physical) 18
Heads (logical) 9
Modulation RLL 1,7 code
SCSI rate
Max burst transfer 20 Mbytes/sec
Seek time 3
Average read 8.0 msec
Average write 9.0 msec
Disc rotation
RPM 7,200
Average latency 4.17 msec
1 Can also be operated according to SCSI-1 protocol.
2 Standard factory units are formatted as follows:
512 data bytes per sector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares
3 Not including on-board controller overhead.