ST11950 and ST12550 Installation Guide, Rev. D 15
Characteristics | ST12550N/ND | ST12550W/WD | ||
Interface | Fast | Fast & Wide | ||
1,024 | Kbytes | 1,024 | Kbytes (W) | |
|
|
| 512 Kbytes (WD) | |
Capacity |
|
|
|
|
Unformatted | 2,572 | Mbytes | 2,572 | Mbytes |
Formatted2 | 2,139 | Mbytes | 2,139 | Mbytes |
Recording |
|
|
|
|
Cylinders (user) | 2,707 |
| 2,707 |
|
Heads | 19 |
| 19 |
|
Avg sectors/track | 81 (51h) | 81 (51h) | ||
Avg bytes/track | 49,768 | 49,768 | ||
Modulation | RLL 1,7 code | RLL 1,7 code | ||
SCSI rate |
|
|
|
|
Max burst transfer | 10 Mbytes/sec | 20 Mbytes/sec | ||
Seek time3 |
|
|
|
|
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 | ||
1Can also be operated according to
2Standard 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
3Not including