Bit 7 6 5 4 3 2 1 0
Byte
0 PS (1) SPF (0) Page Code (20h)
1 Additional Page Length (08h)
2 Reserved
3 Reserved Log Mode
4 Reserved
5 Reserved Seq Mode
6 Reserved
7 Event Type Filter
8 - 9 Event Module Filter
Field descriptions:
PS: Parameters Savable. This field is set to one. The media changer can write this page to
non-volatile memory.
Seq Mode:
This bit indicates the operational mode of the library. When set to 1, the library is in Sequential
Mode. When set to 0, the library is in Random Mode. Note this mode can only be changed by
means of the OCP or Web User interfaces.
Log Mode:
The Log Mode determines the selected behavior of the event log system. This mode can be set to
the following different modes:
Log Mode Description Mode
- Off Logging is disabled 00h
- Continuous Logging has no stop condition. Only n
events can be traced back. Older
events are lost.
01h
- Wait on first error The first occurred error will lead to a
temporary stop of the library.
02h
Event Type Filter:
The Event Type Filter field determines which event types will be stored in the event log. this field
is an 8 bit mask. Every bit in this mask represents an event type. When a mask bit is set, all
events with the subsequent event type will be stored in the event log. When a mask bit is cleared,
the event data of the subsequent event type will be discarded.
Event Type Mask Bit
Cmd 01h
Response 02h
Event 04h
Trace Data 08h
Low Level Trace 10h
Customer Events 20h
Recovered Error 40h
Hard Error 80h
Chapter 3. Supported SCSI Commands 3-37
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