Filter
Top Products
SCSI Description
Maxtor Atlas 10K III 5-17
The FORMAT UNIT Defect List Header (Table 5-15) provides several optional
format control bits to give the initiator more control over the defect lists. Table 5-16
provides descriptions of the data fields in the Defect List Header
.FORMAT UNIT Defect List Header-Data Format
FORMAT UNIT Defect List Header-Field Descriptions
0 Reserved
1 FOV DPRY DCRT STPF IP DSP Immed VS
2-3 Defect List Length
FOV
The Format Options Valid bit indicates that the remaining option bits in this byte
are valid. If this bit is not set, the remaining bits, except Immed, are ignored.
DPRY
during the format to identify defective areas on the media. The drive's default
is 0, indicating that the drive should replace sectors found in the Primary Defect
List during the format.
DCRT
The Disable Certification bit specifies whether the drive should certify the media
during the format. The drive’s default is 0, indicating that the drive should certify
the media.
STPF
The Stop Format bit specifies the error conditions under which the drive is to
terminate the format. The state of the bit is ignored and the drive acts as if this
bit is set. If either the Grown Defect List or the Primary Defect List is not found,
the format operation terminates with a CHECK CONDITION status and a sense
key of MEDIUM ERROR
IP
The Initialization Pattern bit signals the drive that the FORMAT UNIT Parameter
List contains initialization pattern information.
An Initialization Pattern bit of 1 indicates that an initialization pattern descriptor
(Table 5-17) is included in the FORMAT UNIT parameter list immediately follow-
ing the Defect List Header.
An Initialization Pattern bit of 0 indicates that an initialization pattern descriptor
(Table 5-17) is not included in the FORMAT UNIT parameter list, and the drive
will use its default initialization pattern of all zeros.
DSP
The Disable Saving Parameter prohibits the drive from preserving MODE SELECT
parameters received while the Format is in progress. This bit is ignored, and the
drive acts as if it were set.
Immed
When the Immediate bit is 0, the drive returns a status after the format operation
completes. If the disconnect privilege is granted in the accompanying IDENTIFY
message, the drive disconnects from the bus after fetching and validating the
Command Descriptor Block and the FORMAT UNIT Parameter List. If the discon-
nect privilege is not granted, the drive stays connected to the bus during the
entire FORMAT UNIT command. When the Immediate bit is set to 1, the drive
returns a status after the Command Descriptor Block and FORMAT UNIT Param-
eter List have been fetched and validated. In this case, the drive ignores the
IDENTIFY message's disconnect privilege bit and remains connected to the bus
while it validates the Command Descriptor Block and Parameter List. It returns
the completion status before it disconnects. The drive then proceeds with the
format.
VS Vendor-specific. Must be 0.
Defect List Length
that follow. A value of 0 is valid and means that no Defect Descriptors follow.
A CHECK CONDITION status is returned if this value is not a multiple of the de-
fect descriptor size. The Defect List Length is equal to four times the number of
defect descriptors if Block format is used, or eight times if Bytes From Index for-
mat or Physical Sector format is used.