FM encoding, single

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

Non-buffered seeks

........

.1

Buffered seeks

........

0

Standard IBM format,

 

 

256b sectors are 128 in

 

 

track 0

........

1

Non-standard; all

 

 

sectors same size,

 

 

even

 

 

track 0

.......0

........

Soft-sectored media

.......1

........

Hard-sectored media

......0.

........

Fixed media drive

......1.

........

Removable media

 

 

drive

........

........

Reserved

....0...

........

Zone = track

....1...

........

Zone = cylinder

7-14

Page 94
Image 94
Emerson MVME147 manual FM encoding, single