Quantum DLT 4700, Product Manual

Page: 303 / 360

DLT4000 SCSI Interface
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-143
8.5.4.4 Data Transfer Element Status Page
Bit
7 6 5 4 3 2 1 0
0 Element Type Code (4h = Data Transport)
1 PVolTag AVolTag Reserved
2 (MSB) Data Transfer Element Descriptor
3 (LSB)
Byte 4 Reserved
5 (MSB)
6 Byte Count of Descriptor Data Available
7 (LSB)
Descriptor
8 (MSB) Data Transfer Element Address (10h)
9 (LSB)
10 Reserved Access Except Rsvd Full
11 Reserved
12 Additional Sense Code
13 Additional Sense Code Qualifier
14 NotBus Rsvd IDValid LUValid Rsvd Logical Unit Number
Byte 15 SCSI Bus Address (same as tape drive’s)
16 Reserved
17 SValid Invert Reserved
18 (MSB) Source Element Address
19 (LSB)
20 Reserved
21 Reserved
22 Reserved
23 Reserved
24 Density Code of Media (= 0 if empty) (VU)
25 Unused (VU)
Figure 8-93 Data Transfer Element Status Page
PvolTag and AVolTag are always zero.
Access is always set, and Full is set if a cartridge is in the tape drive.
IDValid and LUValid are always set, drive LUN is 0. The SCSI Bus Address field is
the same as the tape drive's controller.
SValid is set if there is a cartridge in the drive, and Source Element Address will
indicate which magazine slot it came from.