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172
[4]
Allocation Length specifies the number of bytes the initiator has allocated for the returned defect data. An
Allocation Length of zero indicates that no Read Defect Data shall be transferred. Any other value indi-
cates the maximum number of bytes to be transferred. The drive shall terminate the Data In phase when
the Allocation Length bytes have been transferred or when all available defect data has been transferred
to the initiator, whichever is less.
[5]
See "Control byte," paragraph 4.2.6.
The Read Defect Data (12) list header (see Table 130) contains an eight byte header, followed by zero or more
defect descriptors.
Table 130:
Read Defect Data (12) list header
Bit
7
Byte
0
Reserved
1
2
Reserved
3
Reserved
4
(MSB)
5
6
7
0
n
Notes.
[1]
The drive interprets the P and G bits (bits 4 and 3 of byte 1 of the CDB) as follows:
Bit P
Bit G
0
0
Return Defect List header only. Target returns only the Defect List header.
0
1
Return the growth "G" list only. This list reflects the growth or "G" list as defined in Section
5.5.
1
0
Return the manufacturer's original ETF list only. This list reflects the manufacturer's origi-
nal ETF list. These defects may or may not have been reallocated, depending on the last
format command received (the last format may or may not have requested the P list flaws
be reallocated during the format function).
1
1
Return all lists. The returned list contains all of the requested drive's defect lists (i.e., P, G,
C, and D) regardless of whether these lists have been reallocated by the drive.
[2]
1 0 0 defines a list in the Bytes from Index format.
1 0 1 defines a list in the Physical Sector format.
[3]
If the P and G bits are 0 0, the Defect List Length will be zero and no Defect Descriptor Bytes are sent to
the initiator. See Tables 46 and 47 for format of Defect Descriptor Bytes.
5.24
Read Element Status command (B4h)
Not implemented. If received, a Check Condition status is sent.
6
5
Reserved
SCSI Interface Product Manual, Rev. J
4
3
P List [1]
G List [1]
Defect List Length [3]
Defect Descriptors [3]
2
1
Defect List Format [2]
(LSB)
0
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