My primary Veeam server is a 12 core, 32GB system, with Server 2012 R2, and runs Veeam itself as well as working as a processing proxy. A second system with 16 cores, 64GB RAM, and Server 2012 runs as a proxy. Both Veeam servers have lots of attached storage, and three Linux repositories are in use. All are connected by 10GbE.
The main server has a Quantum Superloader 3 LTO-7 autoloader with 16 slots, connected using a Dell SAS 12Gbps HBA. This drive consistently runs at 260MB/s. The second system just had a new LTO-8 Superloader 3 installed three weeks ago. Tape jobs run every weekend. So far, each time it has only run at 60MB/s, using LTO-7 media formatted M8.
The thing I've noticed is that the LTO-7 is using hardware encryption every time, while the LTO-8 is using software encryption. All the Veeam media pools are set to use encryption, so far as I can tell Veeam is set up correctly. The Superloader 3 doesn't have anything in its configuration to enable or disable it. I've gone through the browser interface on both and verified they're set exactly the same. I opened a case with Quantum and was told the following:
Any ideas? I must be missing something simple.Quantum support wrote:I have been informed if Veeam does all the key exchanges, it can be setup with HW Encryption. The keys go over the SAS interface. So if you want to setup both the LTO7 and LTO8 for HW Encryption, you may. I understand, SW Encryption is slower as it has to encrypt the data before sending it to the tape drive.