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Barracuda 4 Installation Guide, Rev. E 15
Characteristics of ST15150 drives
N/ND W/WD/WC/DC
SCSI-2 Interface
1
Fast Fast & Wide
Capacity
Unformatted 5,062 Mbytes 5,062 Mbytes
Formatted
2
4,294 Mbytes 4,294 Mbytes
Recording
Cylinders (user accessible) 3,711 3,711
Read/Write heads 21 21
Servo heads 1 1
Avg bytes/track 64,160 64,160
Modulation RLL 1,7 code RLL 1,7 code
Synchronous SCSI rate
Max burst transfer 10 Mbytes/sec 20 Mbytes/sec
Seek time
3
Average read 8.0 msec 8.0 msec
Average write 9.0 msec 9.0 msec
Disc rotation
RPM 7,200 7,200
Average latency 4.17 msec 4.17 msec
Multi-segmented cache
Physical 1,024 Kbytes 1,024 Kbytes
Available to user 977 Kbytes 977 Kbytes
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.