This server is a dual quad core xeon with 4gb of ram, PERC 5/i controller card and 500gb of HD :thumbsup:
Well that's quite a bit of DELL you got there really. Why such paltry drives? What you running or wanting to run/support with this server? For database or other critical applications using RAID1+0 (known as RAID10 to some) would be the fastest but is quite expensive due to needing so many drives. I setup one at work a few months ago and with SAS (Serial Attached SCSI)
SAS using 15K RPM drives. Did an el cheapo speed test on it today actually and it reads about 155MBS sustained and about 330MBS burst reads (exceeding the SCSI 320 theoretical speeds (real life SCSI 320 does not read that fast)
For a backup drive I'd really recommend an LTO3 tape drive from Dell (since you're buying Dell) you can do them to a hard drive but unlike tapes you start to run out of space on a hard drive for backups even with a TB drive. (I just bought one for home since I lost a 300GB drive and about 20% of it was not backed up)
With tapes you can keep buying more and send them off-site for secure backup and over a certain time period do a rotation back into the current tapes. Just decide how long you may want or need backups. At Disney we had to keep some for ever, once did a restore of an entire 340GB drive from tapes that were about 7 years old. Normal Servers were only stored for 1 year, then the tape was brought back in and reused.
A bit different but semi-related. Here is a nice link on Wikipedia for bandwidth limits
List of device bandwidths