I contacted open-e support, and they still could provide me a direct anwser, they also refered to some 'cache' setting in the Adaptec controller, and there is none.
However they qouted some part of the Adaptec user manual I didn't find relevant ate first but turned out to be the solution.
I forced the SCSI negotation to only 40MB/s non Wide as I guessed it would be more tolerant. The LTO2 speed is no bigger then 40MB/s anyway.
With this setting the tape is now writing more then 90% of the time.
A previous backup took 10h for 75GB. I now made a couple of backups of 150MB in 3h! A greater improvement!
I hope this could be of help to anyone in the future.
Reply With Quote