BackupExec 2010R3 slow
I have a 2008 server with BackupExec 2010R3 running under VMWare ESXi 5. The tape unit is a Certance LTO-2 autoloader.
The speed was fine, ~800mb/min, until I changed the C: drive to a SCSI instead of an IDE, and now it is ~175mb/min.
I searched and searched, and tried and tried... The speed is now topped there, no matter the setups and drivers I tried. I created another SCSI controller in VMWare and put the tape and loader under it. I tried the LSI parallel and VMWare paraSCSI, with the same slow results.
I tried certance drivers v3.1, 3.3 and 3.4, also Symantec drivers (for which is was often slower than with other drivers, but I read often this complaint), and even tried HP autoloader and Ultrium-2 drivers.
I tried the single block mode, SCSI pass-through, compression or not. Yesterday I removed the compression on the drive once, and two jobs went at ~300mb/min, but after doing other tests with drive parameters (block size, buffer), it did not happen again. For most of the tests, I left the default settings and all four checkbox unchecked.
If I try a B2D backup, the speed is ~1600mb/min.
Any suggestions would be welcome, as I've been spending days, and nights, on this!