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4.4 Maintenance, Diagnostic Commands
C141-C013 265
Table 4.61 WRITE BUFFER command: buffer data (mode = 000, 001)
Bit
Byte
7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0
2 0 0 0 0 0 0 0 0
3 0 0 0 0 0 0 0 0
4 Buffer Data (Byte 0)
5 Buffer Data (Byte 1)
n Buffer Data (Byte n–4)
(2) Mode = 0, 0, 0, 1: Header + data, with address specification
The format of data transferred from the INIT in this mode must be the same as in
the case of Mode = 0, 0, 0, 0, and the 4-byte header (with zero specified in all its
contents) must be added to them.
In this mode, the top address of the data buffer where the data transferred from the
INIT are stored can be specified in the "Buffer address" field in the CDB.
The "Transfer byte length" field in the CDB specifies the total number of bytes of
data transferred by the INIT. The transfer byte count specification includes the 4
bytes of the header. The HDD stores data transferred from the INIT, in a length in
which the number of bytes in the header has been deleted from the data ("Transfer
byte length" – 4 bytes) in the data buffer beginning at the byte position specified
in the "Buffer address" field in the CDB.
Furthermore, a value less than the ["HDD's buffer size" – value specified in the
"Buffer address" field – 4 bytes] must be specified in the "Transfer byte length"
field in the CDB. When a value larger than that is specified, data transfer is not
executed with the INIT. Also, when zero is specified in the "Transfer byte length"
field, this command is terminated without data transfer being executed.
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Header
Data