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WRITE BUFFER
6.Command Specification
Parameter List Length: specifies the maximum number of bytes that will be transferred during the Data Out phase.
The initiator should attempt to ensure that the Parameter List Length does not exceed the buffer capacity. If this does
occur, the drive returns a CHECK CONDITION status with an ILLEGAL REQUEST sense key set. The capacity of
the buffer can be determined from the Buffer capacity field in the Read Buffer descriptor. The Parameter List Length
must be greater than four (except in data only mode), else the drive will return a CHECK CONDITION status with an
ILLEGAL REQUEST sense key set.
Echo Buffer: In this mode the data shall be stored in an echo buffer. Data shall be sent aligned on four-byte
boundaries. The BUFFER ID and BUFFER OFFSET fields are ignored in this mode. The drive assigns echo buffer
on a per initiator basis. The initiator should attempt to ensure that the parameter list length does not exceed the
capacity of the echo buffer. The BUFFER CAPACITY field in the READ BUFFER echo buffer descriptor determines
the capacity of the echo buffer. If the PARAMETER LIST LENGTH field exceeds the buffer capacity, the drive will
return CHECK CONDITION status with a Request Sense Key of ILLEGAL REQUEST.
SONY AIT-4 drive SDX-900V series Ver.2.1
6-107
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