Quantum DLT 4700, Product Manual, Page: 195 / 360

DLT4000 SCSI Interface
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-35
SP
Saving log parameters is not supported and is always zero.
If the SP bit is set, the command is terminated with CHECK CONDITION status with
the sense key set to ILLEGAL REQUEST, and an additional sense code of INVALID
FIELD IN CDB.
PC
The Page Control field defines the type of parameter values to be returned:
PC Type of Parameter Values
00b Threshold Values
01b Cumulative Values
10b Default Threshold Values
11b Default Cumulative Values
Figure 8-18 LOG Page Control Definitions
The Default Threshold Values are the maximum values that each parameter can
attain.
The Current Cumulative Values are the values computed since the last reset of the
device (either by power-cycling, BUS DEVICE RESET, or SCSI RESET).
The Default Cumulative Values are the values to which each parameter gets initialized
on a reset condition as described previously. Default values are zero.
By default Current threshold values = Default threshold values.
_________________________ NOTE ____________________________
All types of Parameter values are changeable through LOG SELECT.
___________________________________________________________
Page Code
The Page Code field identifies which log page is being requested by the initiator. If the
page is not supported then the command terminates with a CHECK CONDITION
status with the sense key set to ILLEGAL REQUEST and an additional sense code of
INVALID FIELD IN CDB. Supported pages are as follows: