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M2488 PRODUCT GUIDE TAPE UNIT SCSI COMMANDS
April 1997 CG00000-011503 REV. A 4-83
4-3.19 RECEIVE DIAGNOSTIC RESULTS command 1Ch
The RECEIVE DIAGNOSTIC RESULTS command requests that result data, generated for a previ-
ous SEND DIAGNOSTIC command, be sent to the initiator.
** NOTE **
The results of the SEND DIAGNOSTIC command may be lost to
another initiator on the SCSI bus if the LUN under test has not been
reserved to this initiator, or if the RECEIVE DIAGNOSTIC RESULTS
command is not linked after the SEND DIAGNOSTIC command.
4-3.19.1 RECEIVE DIAGNOSTIC RESULTS CDB Description
RECEIVE DIAGNOSTIC RESULTS is a six-byte command. The bytes are shown below and
described in Table 4-75. Common fields are described in paragraph 4-3.1 on page 4-4.
BITS
BYTES 7 6 5 4 3 2 1 0
0
0 0 0 1 1 1 0 0
1
LUN Reserved
2
Reserved
3
MSB
Allocation Length
4
LSB
5
Reserved Flag Link
Note: Changeable fields in the CDB are shaded.
Table 4-75. RECEIVE DIAGNOSTIC RESULTS Field Description
BYTE BIT VALUE DESCRIPTION
0 0-7 1Ch Operation code.
3-4
The Allocation Length specifies the maximum number of bytes that the initiator has
allocated for returned RECEIVE DIAGNOSTIC data. An allocation length of 0
indicates that no RECEIVE DIAGNOSTIC data is transferred. This condition is not
considered an error. The target terminates the DATA IN phase when all allocation
length bytes have been transferred or when all available RECEIVE DIAGNOSTIC
data has been transferred to the initiator, whichever is less.