User Manual

SCSI Commands Reference Manual, Rev. J 74
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
FFMT field
The fast format (FFMT) field is described in table 37.
CONTROL byte
The CONTROL byte is defined in Clause 2.2.7.
1
0
101b
(physical
sector)
Zero
O
See
[b]
and
[d]
1O
See
[b]
and
[e]
0
Nonzero
O
See
[c]
and
[d]
1O
See
[c]
and
[e]
1
0 110b
(vendor
specific)
Vendor specific
O
1O
All others Reserved.
Table 37 FFMT field description
Code Description Support
00b
The device server initializes the medium as specified in the CDB and parameter list before complet-
ing the format operation. After successful completion of the format operation, read commands and
verify commands are processed as described in SBC-4.
Mandatory
01b
The device server initializes the medium without overwriting the medium (i.e., resources for man-
aging medium access are initialized and the medium is not written) before completing the format
operation. After successful completion of the format operation, read commands and verify com
-
mands are processed as described in SBC-4.
If the device server determines that the options specified in this FORMAT UNIT command are
incompatible with the read command and verify command requirements described in SBC-4, then
the device server shall not perform the format operation and shall terminate the FORMAT UNIT
command with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the addi
-
tional sense code set to INVALID FAST FORMAT COMBINATION.
Optional
10b
The device server initializes the medium without overwriting the medium (i.e., resources for man-
aging medium access are initialized and the medium is not written) before completing the format
operation. After successful completion of the format operation, read commands and verify com
-
mands are processed as described in SBC-4.
Optional
11b
Reserved
Table 36 FORMAT UNIT command address descriptor usage (Sheet 2 of 2)
Field in the FORMAT UNIT CDB
DEFECT LIST LENGTH field
in the parameter list
header
Type [a]
Comments
[f]
FMTDATA CMPLST
DEFECT LIST
FORMAT
[a] M = implementation is mandatory. O = implementation is optional.
[b] No DLIST is included in the parameter list.
[c] A DLIST is included in the parameter list. The device server shall add the DLIST defects to the new GLIST.
[d] The device server shall add existing GLIST defects to the new GLIST (i.e., use the existing GLIST).
[e] The device server shall not add existing GLIST defects to the new GLIST (i.e., discard the existing GLIST).
[f] All the options described in this table cause a new GLIST to be created during processing of the FORMAT UNIT
command as described in the text.