We've done more trial runs on restore speeds, and coming up with worrisome
results. Our setup is:

 IBM 7000 servers
 1gig RAM
 4 x 200MHz CPU's
 DLT3570 tape drive (aka DLT4)
 NT Server 4, SP4
 ADSM v3
 2 x 100mb Ethernet (one card is a dedicated network for backups)

We know we've got network issues, giving us about 1 to 1.2 gig/hr restore
speeds.  I did a trial restore to a local disk on the backup server (thus
not using the network), and got 5.7gig/hr.

Here's the problem- we've got a 260gig EMC box that's on a 24hr recovery
SLA.  Even if we get 5gig/hr over the network, that's 52 hours in tape
restore alone.

1) What restore speeds are other clients getting?

2) Would switching to ArcServe or other non-ADSM software help?

3) Is this reasonable SLA for conventional tape backup & restore? (as
opposed to a mirrored EMC box)


____________________________________________________________
Mitchell Ross                           mailto:mitch.ross AT ncgroup DOT com
CompuCom Systems, Inc.          http://www.ncgroup.com
The Source for Technology Deployment Processes and Standards