In the meanwhile, are these errors in the server log thing we have to worry about: 10/28 0:53:02.140 7b8 SPTI: '\\?\scsi#sequential&ven_hp&prod_ultrium_5-scsi#5&35356f5e&0&000400#{53f5630b-b6bf-11d0-94f2-00a0c91efb8b}': IOCTL_SCSI_PASS_THROUGH_DIRECT (after): 0000 38 00 00 00 00 ...

Ok I did another test: I installed hyper-v server 2008 with the same tape and guest configuration. Now the backup is 5-10 x faster.

So could it be that the issues lies with Hyper-v server 2012?

With 2.5Gbps you can get your physical bandwidth with your tape (ignore 10 Gbps virtual network settings as they mean nothing really). Can you move VM to another physical host and check how well it will perform over network? There are loopback issues with MS network stack solved with Windows Server...

I agree tape drives are not the fastest devices, but this one is an HP Ultrium LTO-5 3000 tape drive and when we do a backup directly on it, we get speeds up to 15 times what we achieve now using the tape redirector software? Thus is there any fine tuning to do? Can we optimize things? Because you a...

Hi, From target (core server with tape) -> initiator (guest os with backup software): C:\>iperf -c x.x.x.8 ------------------------------------------------------------ Client connecting to x.x.x.8, TCP port 5001 TCP window size: 64.0 KByte (default) --------------------------------------------------...

Hi, I've installed the service app on the hyper-v core server. I'm using the Microsoft iSCSI initiator to connect to the tape drive which succeeded without any serious problems. Anyway, question: the backup is very very slow... I only get a throughput of 8 MB/sec while this tape drive can do a few 1...

thus you can install the tape redirector software on the host running windows 2012 core (hyper-v) ? Is there some sort of procedure for, since you don't gave a GUI?

thanks
Tom

Hi, Just to be sure, is the following possible: we have a server (hp proliant ml 350 g8) with an hp ultrium 3000 LTO-5 tape drive in it. We would very much like to use virtualization on it but need to access the tape drive from a guest (running Windows server 2008 with backup exec 2012). We are cons...