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ATTO Technology, Inc.
READ 7BUFFER command
The READ BUFFER command is used in conjunction with the WRITE BUFFER command as a
maintenance function for reading and writing microcode and configuration information. The READ
BUFFER command provides access to microcode and configuration parameter storage.
Bit
7
Byte
0
1
2
3
(MSB)
4
5
6
(MSB)
7
8
9
The function of the command and meaning of the returned data depends upon the contents of the Buffer
ID field. The Buffer ID field identifies a specific buffer within the ATTO FibreBridge from which data will be
transferred. The ATTO FibreBridge will transfer the complete buffer or the allocation length bytes,
whichever is less.
The Buffer Offset field contains the byte offset within the specified buffer from which data will be
transferred. If the specified buffer offset is invalid, the ATTO FibreBridge will return a CHECK
CONDITION status with a sense key of ILLEGAL REQUEST and additional sense code of INVALID
FIELD IN CDB.
If an unsupported Buffer ID code is selected, the ATTO FibreBridge will return a CHECK CONDITION
status with a sense key of ILLEGAL REQUEST and additional sense code of INVALID FIELD IN CDB.
REPORT LUNs command
The REPORT LUNS command requests that the peripheral device logical unit numbers of known logical
units in the ATTO FibreBridge be sent to the host. The REPORT LUNS command shall return information
about only those logical units to which commands may be sent. The REPORT LUNS command will only
be accepted by logical unit number zero.
6
5
4
Operation code (3Ch)
Reserved
Buffer Offset
Allocation length
ATTO Technology, Inc.
ATTO FibreBridge Software Manual
3
2
0
Buffer ID
Control
29
-
-
1
0
1
0
(LSB)
(LSB)
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