Mode Select Command (6) / (10) (15H / 55H) - Quantum DLT 8000 Product Manual

5.9

MODE SELECT Command (6) / (10) (15h / 55h)

The MODE SELECT command (available in either 6- or 10-byte format) enables the host
to configure the tape drive. Implementing MODE SELECT and MODE SENSE requires
"handshaking" between the host and the drive. Before configuring the drive, the host
should issue a MODE SENSE command to the drive to obtain a report of the current
configuration and determine what parameters are configurable. The host interprets this
information and then may issue MODE SELECT to set the drive to the host's preferred
configuration. The Mode Parameter List described in Section 5.8 is passed from the
initiator to the drive during the command's DATA OUT phase.
Information for the drive is carried on a number of pages, each of which serves to set the
tape drive's operating parameters. The MODE SELECT pages supported, and the
sections of this manual that details each page, are:
Page Code
01h
02h
0Ah
0Fh
10h
11h
1Ch
3Eh
Except for mode page 3Eh, the tape drive always powers up with its default
configurations set. This is also true if the drive receives a BUS DEVICE RESET message
or a hard reset via the RST line on the SCSI bus.
The Command Descriptor Block is illustrated in Figure 5-34.
For a list of changeable parameters within MODE SELECT, refer to Sections 5.9.9
(EEPROM Vendor Unique Page 3Eh) and 5.9.10.
Description
READ/WRITE Error Recovery Page 5.9.2
Disconnect / Reconnect Page
Control Mode Page
Data Compression Page
Device Configuration Page
Medium Partition Page
TapeAlert Page
EEPROM Vendor Unique Page
NOTE
Quantum DLT 8000 Tape System
Described in Section.....
5.9.3
5.9.4
5.9.5
5.9.6
5.9.7
5.9.8
5.9.9
SCSI Commands
5-71