I got a Library TX24 with 2 HH Ultrium LTO3 drives.
Since last week the write rate during backups dropped from 3 GB/Min to 2 GB/Min.
This alone is not the biggest problem. With the performance drop also the used LTO3 capacity dropped to roughly 60 to 70% of the typical 391 GB. (I don't use any compression)
Now I made a test and started a backup with 900 GB of data. Normally a job for three tapes.
But this time it didn't fit. All media are shown as capacity fully used, but they got only 60 to 70% data on it. In the log file I can see that to all media data were written for 2 hours. After 2 hours the next media was used. If I calculate average writing time * 120 minutes it fits with the size of data on the tapes.
Does anybody know about a limitation there?
How does BE decide that a tape is full? OR is this status feedback coming from the LTO3 tape drive?
Thanks.
