Yesterday we recieved our new Quantum LTO4 SAS drive.
By now it's connected via 4 port Adaptec SAS controller.
We're running RAID 5 with 3 SATA 7200 drives connected via the onboard SATA controller of the INTEL S50000V board.
Symantec Veritas Backup 12 is installed including all latest updates, DDIs and stuff.
The settinngs are:
block size 512K,upped buffer size 1024K, buffer count 30, and high water mark to 15.
SCSI read and write pass through are activated.
Hardware and software compression are disabled.
Now i only get like 400Mb/min tranfer rate, which is extremly low and which is even less than our previous DLT drive did.
Our 650GB backup has no chance to get completed at night.
Does anyone have some useful hints how to increase the performance?
Thanks a lot.