On Tue, May 18, 2004 at 04:53:07PM -0500, Geoff Hardin wrote:

So, I guess what I'm really asking is 1) "What kind of speeds are you seeing?" and 2) "Am I doing something wrong?"

We get about 20MB/s to GigE SDLT drives. The drives have a built in NDMP server and are on a private GigE network with the filers. Our FAS960s can push 6+ streams at 20MB/s each, the F880 maxes out at about 5-6 streams. Our F760 used to manage 4 streams at 15+MB/s.

We are switching over to LTO drives connected to DinoStor Tape Servers (http://www.dinostor.com) which do the same job as the built in NDMP server that our SDLT drives have.

In our experience, and that of our NetApp SE, direct attached tape drives have worse performance then network attached drives. NetApps are optimized for sending data out of the network, not for dealing with tape drives.

John