Initialization Pattern Descriptor - Seagate SCSI Interface Product Manual

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[5] Initialization Pattern (IP). An IP bit of one indicates that an initialization pattern descriptor is included in the
Format Unit parameter list immediately following the defect list header. An IP bit of zero indicates that an
initialization pattern descriptor is not included and that the target uses its default initialization pattern.
The initialization pattern type field indicates the type of pattern the target shall use to initialize each logical
block within the initiator accessible portion of the medium (Table 44). All bytes within a logical block shall
be written with the initialization pattern. The initialization pattern is modified by the IP modifier field as
described in Table 43.
[6] Disable Saving Parameters (DSP). A DSP bit of one, specifies that the target shall not save the Mode
Select savable parameters to non-volatile memory during the format operation. A DSP bit of zero specifies
that the target shall save all the Mode Select savable parameters for all initiators to non-volatile memory
during the format operation.
[7] Immediate (Immed). An Immed bit of zero indicates that status shall be returned after the first operation
has completed. An Immed bit value of one indicates that the target shall return status as soon as the com-
mand descriptor block has been validated, and the entire defect list has been transferred. Check individual
drive's Product Manual, Volume 1, for applicability of this feature.
[8] Vendor Specific (VS). Not used.
[9] Defect List Length. The length of any following D list (Defect Descriptors) must be equal to 8 times the
number of sectors to be reallocated per Table 46 or Table 47.
Note. The initiator may not use any previously defined "C," "G," or "D" lists if the sector size (block length) has
been changed.
5.5.2.2

Initialization Pattern Descriptor

The Initialization Pattern option specifies that the logical blocks contain the specified initialization pattern. The
Initialization Pattern Descriptor (Table 42) is sent to the target as part of the Format Unit parameter list.
Table 42: Initialization Pattern Descriptor
Bit 7
Byte
0 IP Modifier [1]
1 Pattern Type [2]
2 (MSB)
3
0-n Initialization Pattern [1]
Notes.
[1] Initialization Pattern (IP) and IP Modifier. The Initialization Pattern is modified in accordance with the spec-
ification of the IP Modifier field given in Table 43.
Table 43: Initialization Pattern and IP Modifier
IP Modifier Description
0 0 No header. The target shall not modify the initialization pattern.
0 1 The target shall overwrite the initialization pattern to write the logical block address in
the first four bytes of the logical block. The logical block address shall be written with the
most significant byte first.
1 0 The target shall overwrite the initialization pattern to write the logical block address in
the first four bytes of each physical block contained within the logical block. The lowest
numbered logical block or part thereof that occurs within the physical block is used. The
logical block address shall be written with the most significant byte first.
1 1 Reserved.
6 5
Initialization Pattern Length [3]
SCSI Interface Product Manual, Rev. J
4 3
Reserved
2 1
(LSB)
0