Symantec Backup Exec 2010 R3 performance poor
I am investigating some performance issues we are having backing up to tape using BE 2010 R3.
THe way our process works is we do a B2D2T we have a backup server where we have Veeam installed which we use to backup to disk. We then use BE 2010 R3 to backup the veeam file created (one large 1tb .vbk file). This veeam file is a file which Veeam creates when creating backups of our VMs in VMware.
This file has already been compressed within Veeam. We then backup this 1 file to tape onto our IBM TS3200 tape library directly connected via 6GB SAS on the backup server. We recently upgraded the unit in here to LT0-5. We were using LT0-4 before but the performance we are getting is the same as LT0-4.
Firmware upgrades on the tape library unit, server have all been done. BE is fully patched up on the server. Its running Windows 2008 32-bit with 4gb ram.
We have tried numerous tests with buffer settings but still the same performance. We have turned encryption off and compression within BE only off.
I am running out of ideas and am now thinking could it be that because this veeam file is already compressed. Is symantec just slowing down because its already compressed?
Is there any advice on backing to tape changing settings within BE? I have tried numerous settings within BE. Currently the device is set as the following:
block size (per device) - 64kb
buffer size (per device) - 1mb
buffer count - 10
high water count - 0
read single block mode - off
write single block mode - off
read scsi passthrough mode - off
write scsi passthrough mode - on