TAPE UNIT SCSI COMMANDS M2488 PRODUCT GUIDE
4-32 CG00000-011503 REV. A April 1997
4-3.9 LOG SELECT command 4Ch
The LOG SELECT command provides a means for the initiator to manage statistical information
maintained by the target about itself and attached logical units. It is a complementary command to
the LOG SENSE command. Log data is collected within the target on a per event basis regardless of
the initiator ID.
4-3.9.1 LOG SELECT CDB Description
LOG SELECT is a ten-byte command. The bytes are shown below and described in Table 4-29.
Common fields are described in paragraph 4-3.1 on page 4-4.
4-3.9.2 LOG SELECT CHECK CONDITION Status
A LOG SELECT command, with the parameter code reset bit (PCR) set, a PC of 01b, and a
parameter list length of zero from any initiator, causes the target to reset parameters maintained in
its Log pages.
Any values other than those indicated will result in CHECK CONDITION status with ILLEGAL
REQUEST.
BITS
BYTES 7 6 5 4 3 2 1 0
0
0 1 0 0 1 1 0 0
1
LUN Reserved PCR=1 0
2
PC Reserved
3
Reserved
4
Reserved
5
Reserved
6
Reserved
7
MSB
Parameter List Length
8
LSB
9
Reserved Flag Link
Note: Changeable fields in the CDB are shaded.
Table 4-29. LOG SELECT Field Description
BYTE BIT VALUE DESCRIPTION
0 0-7 4Ch Operation code.
1 1 1b Parameter Code Reset (PCR)
2 6-7 01b The Page Control (PC) field defines the type of parameter values to be
selected. The only supported PC value is 01b (current cumulative values).
7-8 0 Parameter List Length
