Trevor,

We performed some limited restore performance testing at a site very
similar to yours: H50 w/ 3575 robot.  Relatively small numbers of large
files, >5 MB with the average somewhere around 6 or 7.  I don't know what
the file restore rate was, but we were able to see 6 GB/hour with a single
stream and it scaled linearly up to 18 GB/hour with three streams running.
 The client was a rather small NT system: 128 MB, 300 MHz processor and
three SCSI disks.  We restored one stream per disk.  The data was coming
from both disk and tape on the server.  The performance was actually better
coming off the tape than the disk.  Could be the reduced RAID set causing
this though.

I was pleased.  I saw no visible delay from the time I hit the carriage
return and data started flowing.

This was a new installation.  Smallish DB with smallish numbers of files
overall in the entire system.  So perhaps my test was not valid compared to
your situation.  But you are right, something seems amiss.

Kelly Lipp
Storage Solutions Specialists, Inc.
lipp AT storsol DOT com
www.storsol.com
(719) 531-5926