Quantum 10K II - Manual (Page 98)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–31
FORMAT UNIT Command (04h) (continued)
Table 5–10 FORMAT UNIT Initialization Pattern Descriptor — Field Descriptions
Name Description
IP Modifier The Initialization Pattern Modifier must be 0.
IP Type The Initialization Pattern Type field (Table 5-11) indicates the type of pattern the
drive uses to initialize each logical sector within the initiator-accessible portion of
the medium. All bytes within a logical sector are written with the initialization
pattern.
IP Length The Initialization Pattern Length field indicates the number of bytes contained in
the Initialization Pattern. The valid lengths (when IP Type = 1) are two or four
bytes.
IP Initialization Pattern.
Table 5–11 FORMAT UNIT Initialization Pattern Type
Initialization
Pattern Type
Description
00h Use default pattern.1
01h Repeat the initialization pattern as required to fill the
logical sector.2
02h – FFh3 Reserved.
NOTES: 1 If the Initialization Pattern Length is not 0, the drive terminates the command with
CHECK CONDITION status. The sense key is set to ILLEGAL REQUEST, and the
additional sense code is set to INVALID FIELD IN PARAMETER LIST.
2 If the Initialization Pattern Length is 0, the drive terminates the command with
CHECK CONDITION status. The sense key is set to ILLEGAL REQUEST, and the
additional sense code is set to INVALID FIELD IN PARAMETER LIST.
3 If the Initialization Pattern Type is not 0 or 1, the drive terminates the command
with a CHECK CONDITION status. The Sense Key is set to ILLEGAL REQUEST, and the
Additional Sense Code is set to INVALID FIELD IN PARAMETER LIST.