Backup of Virtual Machine - Server 2008 on a Server 2012 R2 Host

We've recently virtualised a SBS 2008 (Hyper-V) on to a Server 2012 R2 Host, as the disk space had become critical and we needed to maintain the SBS whilst we work out a migration plan away from SBS.

The SBS 2008 was virtualised using Shadow Protect and then restored into a virtual machine on the Server 2012 R2 Host. This has a dual processor Dell R730 server with 32GB of RAM and 8 x 1.2TB 10K SAS disks arranged in a RAID 10 configuration.

The previous backup was performed using Shadow Protect to physical USB disks which were rotated each night and taken off-site, generally the whole backup would be completed in about four to five hours.

I've found that since virtualising, that if we patch through the USB directly onto the virtual (take the disk off-line on the host) and then add it to the client SBS, then the backup takes about three to four hours and works o.k. However, each time the backup drive is disconnected then we have to perform the whole operation again. We see a throughput of about 40MB/sec.

If we try to patch through the host - map a drive through the host so the client virtual machine can see the USB drive like a mapped network drive - then the backup process takes forever (18 hours) and we see a throughput of about 8MB/sec.

I've looked at maybe backing up to NAS using iSCSI but I still have the issue of getting the backup off-site.

Ideally I'm looking for a solution (still use Shadow Protect) but one that allows me to either continue using USB's rotated off-site as the client is used to doing this and it works quite well. Or maybe to a local NAS and then replicate that backup to our own NAS or something similar - ideally with as little overhead as we had before with the rotation of the USB drives or similar - that works and is fast!

The questions I'm asking are:

1) With the setup I have is USB backup a non-starter without lots of admin overhead?
2) How do other people backup virtual machines - if not using USB drives?

Thanks for all your replies and help.
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foxpc123Asked:
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Lionel MMSmall Business IT ConsultantCommented:
I do something similar however because of the USB issue you mentioned that requires manual intervention I simply do my backup to a shared folder on the Hyper-V host for the server2008, then on the Hyper-V host I run a scheduled task command to robocopy those backups to the USB drives--granted it takes longer but not as long as 18 hours.
foxpc123Author Commented:
Hi Lionelmm

Could you expand on this answer please and explain in a little more details how you do this and I'll try the same thing on my set-up.

Thanks
Lionel MMSmall Business IT ConsultantCommented:
OK I create  share on my host, on one of it drives not on the C Drive but one of the others. Then on the VM I create a network connection to that share, let's say drive M. Then in Windows backup I use the option to backup to a network location, to the drive M. It then backups to this location. I take note of what time it finish, how long it takes and then based on that setup a scheduled task on the  host (hyper-v) to run a robocopy script to copy (or you could do a move but I do a copy) from the shared folder to the USB drive connected to the host. I even have my script check the free space on the USB drive and if it is below a certain size that it then deletes older copies of my backups. I can let you see these scripts if you are interested in this approach.
Lionel MMSmall Business IT ConsultantCommented:
This comment is a valid answer to the question asked and it does in fact work. Questioner was engaged and asked for further details and once provided no more interaction so I must assume that that further explanation was sufficient. So please force accept that comment -- thank you

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foxpc123Author Commented:
I agree with Lionelmm this was the approach that was taken in the end - this can now be closed down.
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