Quantum DLT 2500, Product Manual

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DLT2000 SCSI Interface
8-38 DLT2000/DLT2700 Cartridge Tape Subsystem
8.4.8.2 Read/Write Error Log Page (Page 2 and 3)
Each Log page will begin with a 4-byte header followed by n number of log parameter
blocks, each block of 8 bytes except for parameter code 5h.
The log parameter block for the Parameter total bytes processed (5h) will be 12 bytes,
since the parameter value is 8 bytes long.
Log Page Header
Bit
7 6 5 4 3 2 1 0
0 Reserved Page Code
Byte 1 Reserved
2
(MSB)
Page Length
3 (LSB)
Log Parameters
0 (MSB) Parameter Length
1
(LSB)
2 DU DS TSD ETC TMC Rsvd LP
3 Parameter Length
Byte 4 (MSB)
— Parameter Value
—
11
(LSB)
Figure 8-21 Read/Write Error Log SENSE Page Format
Page Code
The Page Code echoes the page code that was specific in the LOG SENSE CDB.
Page Length
The Page Length specifies the total number of bytes contained in this log page, not
including the four bytes of the heads.
For example, if PPC bit is zero and parameter pointer is zero then target will return 4
bytes of page header with page length of 44h followed by 8 bytes of parameter value
data for each parameter code except for parameter code 5h. For 5h, it will return 12
bytes.
So, for Parameter code 0h, 1h, 2h, 3h, 4h, 6h, and 8000h, each page will be 8 bytes. For
parameter code 5h, page will be 12 bytes.