Emerson MVME147 manual Notes, Head Bytes from Index MSW Note

7

SCSI PACKETS

Head

Bytes from Index (MSW) (Note 2)

Bytes from Index (LSW) (Note 2)

$00	00000000	00000000	Defect list code
$02	xxxxxxxx	xxxxxxxx	Reserved
$04	xxxxxxxx	xxxxxxxx	Reserved
$06	xxxxxxxx	xxxxxxxx	Sector number
			(MSW) (Note 5)
$08	xxxxxxxx	xxxxxxxx	Sector number (LSW)
			(Note 5)
.		.
.		.
.		.
		xxxxxxxx	xxxxxxxx
Sector number
(MSW) (Note 5)
		xxxxxxxx	xxxxxxxx
Sector number (LSW)
(Note 5)

The packet points to the defect list. The defect list contains defect sector numbers in ascending order. Following the defect list, an "additional" work area must be provided. This work area must be equal to 2N + 1 longword, (where N = number of defects). Some controllers require the defect lists in a different form, and if needed, the SCSI firmware builds the list in the area provided. A defect list code of $0000 implies that the defects are specified as physical sector numbers. Otherwise, the defect list codes and their corresponding representation are as follows:

Code $0000 = Sector number

Code $0001 = Cylinder, head, sector number Code $0002 = Cylinder, head, bytes from index

NOTES: 1. Filled in by you.

7-38