Arcserve 2000: What are TskJob*.log in the LOG directory?

[tapemeister]

Some of the lines are as follows:

20020213 085742 00 ----------- START LOGGING -----------
20020213 085742 00 MULT Backup TSIHandle address : aa69a0
20020213 085742 00 MULT Job Start After JobOpenTape: Data Multiplexing has been reset for this job
20020213 085742 00 MULT TSI Funcs Getting a new Session #1
20020213 085742 00 MULT TSI Funcs Starting Session 1

Then it appears it goes for the next job or next job date. What does this refer to and what do some of the abbreviations mean.

Thanks