Read Buffer Command
August 2016 Commands 157
• The dump buffer may contain multiple dumps up to a maximum of 12 MB of
data.
• The maximum amount of permanent error trace data or event log data is
524KB.
• If no data remains to be transferred, Check Condition status is returned. The
sense key is set to Blank Check with the valid bit set.
TABLE 3-110 Read Buffer Descriptor
Byte
Bit
76543210
0 Offset Boundary
1
thru
2
(MSB)
Buffer Capacity
(LSB)
Parameter Value
Offset Boundary FFh = 0 is the only supported offset boundary
Buffer Capacity Size of selected buffer in bytes
TABLE 3-111 Echo Buffer Descriptor
Byte
Bit
76543210
0 Reserved EBOS
1 (MSB) Reserved
2 Reserved (LSB) (MSB) Buffer Capacity
3 Buffer Capacity (LSB)
Parameter Value
Buffer Capacity Size of Echo Buffer in the bytes aligned to a four byte boundary.
Maximum size is 4096 bytes
EBOS: Echo Buffer Overwritten
Supported
1 = Supported. Illegal Request, echo buffer overwritten additional
sense code is returned if data was not previously written by the
same initiator.
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