I would agree, since WHS is relying on single platter speeds your drive speeds are very important. As a side note I noticed that it seems to be directly placing all the incomming files on the 2nd drive and keeping the 1st drive clear.
I ran some tests today for the client backup utils. Very neat stuff. I have a Vista virtualized on Hyper-V for testing purposes so I thought I'd install the client connector on it and try out the backup feature.
Here's what happens.
You navigate to a share called \\\\WHS\\Software\\ClientConnector.exe.
Double click and it installs the connector on the Vista client. It also asks you if the client should wake during hibernate/sleep to backup or only backup when on.
Once installed it places a connector icon in your system tray. Double click it and it prompts you for the admin password and then pulls up the WHS Command Console.
From there you have full control to create a new backup, set an automated backup schedule and decide what local drives to backup using check boxes.
The test Vista client has a 40GB virtual drive of which 17GB is used. I ran a full manual image backup that completed in 9 minutes and change. Not bad.
Once the backup was completed the console looked like this.
If you're backing up more than one client they will all be listed here.
Select the client icon and click on View Backups this window pops up providing a list of backups for that client.
Select the specific backup and click on details;
Now here's something useful. If you click Open in the Restore and View Files section, it opens the backed up C:\\ drive archive in a windows explorer window where you can browse files and folders and drag and drop a file out of it that you may have lost, deleted or corrupted. Nice feature.
I suppose the best part is with the Admin password you control all the client backups from one place, the WHS command console. If you have multiple laptops, desktops and htpc's this is a very cool feature.
From the console you set things like Start and End times you want backups to run (while everyone's asleep - including the machines to be backed up)
Nbr of months to keep monthly backups, weeks for weekly and days for daily backups.
Still feeling my way around WHS. It's not the fastest compared to a hardware raid 5 array with 8-12 or more blazing drives running windows server 2008, but for home media serving and a whole bunch of other neat features, it's seems to be just fine so far.
Hope you guys don't mind the updates.