HP C2488A Technical Reference Manual page 64

Format Unit
If set to one (1), a new Dlist will be supplied by the Initiator and the CMPLST bit and the
Defect List Format field will provide additional parameters.
CMPLST (Complete List). Determines whether or not existing defects in the Glist will be
retained during the format. If set to zero (0), the Glist is retained and the Dlist is appended
to it. If set to 1, the defects in the Dlist are used to create a new Glist which replaces the old
Glist.
Defed List Format. The supported field values are:
Field Value Description
o
0 0 Block format (defect list length of zero)
o
0 1 Reserved
o
1 0 Reserved
o
1 1 Reserved
1 0 0 Bytes from index format
1 0 1 Physical sector format (recommended)
1 1 0 Reserved
1 1 1 Reserved
FORMAT UNIT Defect Sources
FMTDTA CMPLST Defect List
Defect List
Target Instructions
Format Field Supplied
0
1
X XXX
No
• No Data Out Phase.
• No Dlist supplied by Initiator.
• Retain current Glist
2 •
1 0 101
Yes
• New Dlist supplied by Initiator.
or
• Retain current Glist
2 •
100 • Append new Dlist to current Glist.
or
000
3
1 1 1 01
Yes
• New Dlist supplied by Initiator.
or
• Build new Glist from supplied Dlist.
100 • Replace old Glist with new Glist.
or
.
000 3
Notes:
1.
The preferred option is FMTDTA
=
O.
2. The Format Unit command always leaves the Plist unaltered.
3. Defect list length of zero only.
Vendor Unique Byte. This byte must contain all zeros.
Interleave. These bytes specify the order in which logical blocks are related to physical blocks.
Any interleave value will be accepted, but the Target will ·always use its default interleave
value of (1) so that logical blocks are placed in consecutive physical order.
A-8 SCSI Command Descriptions DRAFT
1/18/93 09:58