Building an optimal computer to run VirtualBox

Building an optimal computer to run VirtualBox I'm going to build a computer on which I'm going to run 2-3 VirtualBox guests. The main system will be Fedora. On my current desktop (8GB RAM, one 7200rpm drive), disk I/O seems to be the bottleneck.
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Total answers/comments: 2

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Guest [Entry]

I'd go with the higher amount of memory first and foremost. The more data you can hold in memory at a time, the less frequent you need to access the disk. If you can pick 2 of 3, go for the RAID-5 for sure. 10k rpm drives are fairly high priced and not really worth the price to performance ratio. RAID-5 offers performance and redundancy all in one.

Guest [Entry]

and disk I/O will always be a bottleneck when you have more than one active VHD on the same drive, RAID or no RAID. scrap the 'RAID idea' and place your virtual hard disks on 3 separate hard drives instead.