Quantum DLT 2500, Product Manual

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DLT2000 SCSI Interface
DLT2000/DLT2700 Cartridge Tape Subsystem 8-139
8.5.3 MODE SENSE/SELECT (1Ah/15h)
All three pages that are specific to Medium Changers are supported.
8.5.3.1 Device Capabilities Page (1Fh)
The drive shall support the Device Capabilities Page which has the following format:
Bit
7 6 5 4 3 2 1 0
0 PS 0 Page Code (1Fh)
Byte 1 Additional Page Length (0Eh)
2 Reserved StorDT StorI/E StorST StorMT
3 Reserved
4 Reserved
MT DT MT I/E MT ST MT MT
5 Reserved ST DT ST I/E ST ST ST MT
6 Reserved
IE DT IE I/E IE ST IE MT
7 Reserved DT DT DT I/E DT ST DT MT
8 Reserved
9 Reserved
10 Reserved
11 Reserved
12 Reserved
MT<>DT MT<>I/E MT<>ST MT<>MT
13 Reserved ST<>DT ST<>I/E ST<>ST ST<>MT
14 Reserved
IE<>DT IE<>I/E IE<> T IE<>MT
15 Reserved DT<>DT DT<>I/E DT<>ST DT<>MT
Figure 8-90 Device Capabilities Page Format
Bit Field Values
•
Elements that can store media: StorDT, StorST
•
Valid Source->Destination pairs: ST->DT, DT->ST
All the "MT->XX" and the "XX->MT" entries are zero, since the loader will not accept
a Medium Transport element address as a source or destination.
All the "IE->XX" and the "XX->IE" entries are zero since there is no Import/Export
element.
Bytes 12 through 15 are all zero as the medium changer does not support the exchange
medium command.