Quantum Instruments DLT 7000 manual Directory Failure Event Log Packets

Appendix B: EEPROM-Resident Bugcheck and Event Logs

B.2.3 Directory Failure Event Log Packets

Directory failure event logs are written when a directory read or directory write request fails for any reason. 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.

Table B–3 Directory Failure Event Package – Field Descriptions

Field	Description
Saved Overwrites /	These fields serve as temporary counters and have no use in
Rereads / Rewrites	interpreting the directory failure packets.
Directory Called Mode	A code that specifies the original reason for the directory call.
	A value of 1 indicates a directory READ (on LOAD).
	A value of 2 indicates a directory WRITE (on UNLOAD).
	A value of 3 indicates a directory WRITE (on WRITE from BOT).
Tape Format Called /	These fields contain the TMSCP values for the tape format both prior
New	to and after the directory operation.
Flags	A bit-mapped field that provides additional status information.
	Bit Mask Meaning
	0x01h READ on LOAD operation complete
	0x02h Inhibit further WRITE operations unless WRITE from BOT
	0x04h LBN 0 was found intact
	0x08h	Directory WRITE failed
	0x10h	Tape format mismatch
	0x20h	Event log generated
	0x40h	Tape format unknown
	0x80h	Reserved

B-4 Quantum DLT 7000 Tape System