Seagate Travan 40, Product Manual

Page: 44 / 137

Chapter 5 ATAPI Interface
Page 36 Seagate Travan 40 Product Manual
LOG SELECT (Group 2, Code 4C)
The LOG SELECT command provides a means for the Initiator to manage statistical
information maintained by the tape drive about itself.
CDB for LOG SELECT Command
Data Bits
Byte 7 6 5 4 3 2 1 0 Hex
0 0 1 0 0 1 1 0 0 4C
1 0 0 0 0 0 0 PCR SP 0X
2 PC 0 0 0 0 0 0 X0
3 0 0 0 0 0 0 0 0 00
4 0 0 0 0 0 0 0 0 00
5 0 0 0 0 0 0 0 0 00
6 0 0 0 0 0 0 0 0 00
7
8
MSB
Parameter List Length
LSB
XX
XX
9 0 0 0 0 0 0 0 0 00
PCR: The Parameter Code Reset (PCR) bit shall be set to 1 with the parameter list
length equal to 0 to reset CERTAIN FIELDS OF Log Sense Page 03h (see their
respective definitions). If PCR bit is 1, and the parameter list length is greater than 0,
the command will terminate with
Check Condition status. The Sense Key will be set
to Illegal Request and the additional Sense Code will be set to Invalid Field in CDB .
SP: The Save Parameters (SP) bit must be set to 0.
PC: The Page Control (PC) field must be set to 01b. This field defines the type of
parameter values to be selected. The Cumulative Values parameter is the only one
supported.
Parameter Length: This field must be set to 0 when the PCR bit is set to 1 to cause
the parameters to be reset. This field must be set to the appropriate size when using
page 32 to modify the configuration and the PCR bit must be 0 when sending
parameters.