User's Manual

DLT2000 SCSI Interface
8-30 DLT2000/DLT2700 Cartridge Tape Subsystem
8.4.7.1 Operation of LOG SELECT
The purpose of the LOG SELECT command is to allow the initiator to modify and
initialize parameters within the logs supported by the device.
There are two ways to initialize the log parameters. First, set the PCR bit in the LOG
SELECT CDB; this clears all parameters. Secondly, individual pages can be cleared by
specifying the log page and the parameter value as the log parameters. The following
pages can be cleared in this manner.
Page Code Page Description
02h
03h
32h
Write Error Counter Page
Read Error Counter Page
Compression ratio page
Figure 8-14 Clearable Log Pages
If multiple pages are sent during this DATA OUT phase, they must be sent in ascending
order according to page code. Otherwise the command will terminate with a CHECK
CONDITION status with the sense key set to ILLEGAL REQUEST and an additional
sense code of INVALID FIELD IN PARAMETER LIST. The same status will be
returned if an unsupported Page Code appears in any header, or if the specified page
cannot be cleared.