Log Page Format
All log pages (except page 0) consist of a log page header, followed by a number of log parameters. The log page header has the format indicated in Table 16.
Table 16. Log Page Header Format
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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0 | Reserved |
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| Page Code |
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1 |
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| Reserved |
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2 |
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| Page Length |
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3 |
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The Page Code is a byte value that uniquely identifies what log page is being returned. The Page Length describes how many bytes are to follow for the entire log page.
Each log parameter has the format indicated in Table 17.
Table 17. Log Parameter Format
| 7 | 6 | 5 |
| 4 | 3 |
| 2 | 1 | 0 |
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0 |
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| Parameter Code |
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1 |
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2 | DU | DS (1) | TSD (0) |
| ETC (0) | TMC (0) |
| LBIN | LP | |
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3 |
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| Parameter Length |
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4 |
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:
Parameter Bytes
n
The Parameter Code is a
The Disable Update (DU) flag is set for any parameter that the server can neither write nor reset.
The List Parameter (LP) flag is 0 for parameters that are counters and 1 for parameters that are not counters.
If the LP flag is 1 and the parameter is a binary parameter, then the List Binary (LBIN) flag is set to 1. Otherwise it is set to 0.
The TSD, ETC and TMC fields are always 0 and the DS field is always 1.
The Parameter Length field gives the length of the field in bytes.
The Parameter Bytes field contains the actual parameter data.
18Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference
