7 |
SCSI PACKETS
........ | .......0 | FM encoding, single |
|
| density |
........ | .......1 | MFM encoding, |
|
| double density |
........ | ......0. | Single track density |
|
| (media TPI = ½ drive |
|
| TPI, |
|
| double step) |
........ | ......1. | Double track density |
|
| (media TPI = drive |
|
| TPI) |
........ | ........ | Reserved |
........ | ....0... | 250K bits/sec data |
|
| rate (5¼ inch) |
........ | ....1... | 500K bits/sec data |
|
| rate (8 inch) |
........ | ...0.... | Floppy media |
........ | ...1.... | Rigid media |
........ | ..0 | No reserve on attach; |
|
| no release on detach |
........ | ..1 | Reserve on attach; |
|
| release on detach |
........ | .0 | |
........ | .1 | Buffered seeks |
........ | 0 | Standard IBM format, |
|
| 256b sectors are 128 in |
|
| track 0 |
........ | 1 | |
|
| sectors same size, |
|
| even |
|
| track 0 |
.......0 | ........ | |
.......1 | ........ | |
......0. | ........ | Fixed media drive |
......1. | ........ | Removable media |
|
| drive |
........ | ........ | Reserved |
....0... | ........ | Zone = track |
....1... | ........ | Zone = cylinder |