Write Long (3F) - IBM Ultrastar 36LZX Specifications

8.44 WRITE LONG (3F)

Byte
7 6
0
1 Reserved = 0
2 (MSB)
3
4
5
6
7 (MSB)
8
9 VU = 0
Figure 163. WRITE LONG (3F)
The WRITE LONG command requests the drive to write one block of data transferred from the initiator.
The transfer data must include
Ÿ
User Data
Ÿ
40 bytes of ECC data
Parameters are
Ÿ Logical Block Address field specifies the logical block at which the write operation shall occur.
Ÿ Byte Transfer Length. This field must specify the exact number of bytes of data available for trans-
fer. If a non-zero byte transfer length does not match the available data length, the target terminates
the command with CHECK CONDITION status, then the sense key is set to ILLEGAL REQUEST,
and an additional sense code is set to INVALID FIELD IN CDB. The valid and ILI bits are set to one
and the information field is set to the difference of the requested length minus the actual length in
bytes. Negative values are indicated by two's complement notation.
Ÿ RelAdr (Relative Block Address) is not supported. Must be set to ZERO.
Bit
5 4 3
Command Code = 3Fh
Reserved = 0
Logical Block Address
Reserved = 0
Byte Transfer Length
Reserved = 0
Ultrastar 36LZX hard disk drive specifications
2 1 0
RelAdr
= 0
(LSB)
(LSB)
FLAG LINK
186