Backup Exec Meida server as a VM guest

We had some hardware problems with our current 12.5 Exec from running on a Dell 4400 Server backup.   So we thought we would give him a try to P2V a Dell 2600 ESX 3.5 server.

Tape drive - tape Exabyte VXA-3 SCSI drive

Host controller - Adaptec SCSI Ultra 160 29160 controller

During the test backup very frist after p2v conversion and the shift of the SCSI controller card backup performance was terrible.  About 100 MB per minute.

I had feared this and thought I would just need to return to a self-sustaining media dedicated server.

However, the next backup performance and for the following week was about 600 MB / / minute.  It was even better that the old physical Dell 4400 server we had.

Then all of a sudden about a week later backup now back back about 100 MB speeds / / min.     A job that used to take about 38 minutes to run now takes 4 hours.

If it is not possible to have a server of media as a guest to talk to the SCSI card in the host ESX 3.5 then so be it.  But it has worked for more than a week, then stopped.

The only thing that has changed is that I added a virtual disk of 300 GB for Backup Exec Server 2003 32 bit sp2 media server.   So that I could make this record to the file backups.   Given that this speed does not exceed 100 MB / per minute.

My backups of backups from disk to disk file are around 600 MB speed.   It tells me that the neck of the bottle is not in the network, but in the more likely tape drive SCSI communications.

I'm back up the server of current reviews as well as other guests as well as other physical servers.

All the ideas from the community would be greatly appreciated.

If I just need a cavity on the idea and go back to only a dedicated physical server I can do the same.

Thank you.

Randy

Just to clarify. You just use a single SCSI HBA for a local disk and the tape drive? How many SCSI controllers are in this host at all? Passthrough or paravirtual controllers?

Close to real world throughput is possible. I am using a media server in a virtual machine and it works pretty well. The SCSI controller dedicated to the tape library is presented paravirtualized for the virtual machine. Flow 4 GB per minute constantly (real world of max. 5 GB/min.). A passthrough controller would make probably even much better.

But there are some differences between your config and mine. I use a library of tapes LTO4 and paravirtualized dedicated HBA. I read of fiber channel THAT SAN LUNS presented as RDM. And finally and most importantly, my vm is not migrated. It was installed virtual from scratch with only the required drivers.

Just some thoughts.

Tags: VMware

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