Quantum DLTtape DLT 4000, Product Manual

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Appendix B: EEPROM-Resident Bugcheck and Event Logs
B-4 Quantum DLT 4000 Tape System
Directory Failure Event Log Packets
Directory failure event logs are written when a directory read or directory write
request fails for any reason. Figure B-1 shows the data format and Table B-3
provides the description of important fields within the packet. Note that the byte
count begins at Byte 13, the location of the 1st event log byte within the event
log packet.
Bit
Byte
7 6 5 4 3 2 1 0
13 Saved Max Overwrites
14 Saved Max Rereads
15 Saved Max Rewrites
16 Dir Called Mode
17 - 18 Tape Format (when called)
19 - 20 New Tape Format
21 Flags
22 Primary Status
23 Secondary Status
24 Reserved
25 Missing Block Count
26 Total Expected LBNs
27 - 28 Servo EOT Address
29 - 32 Unique Media ID
33 - 36 CR-MSG Buffer Address
Figure B–1 Directory Failure Event Package – Data Format