I'm looking into this exact same issue, but for a 400 MHz box with NT 4.0. Here's what I've come up with so far:(posted 9068 days ago)Ultra ATA drives are plenty good enough for DV editing. The data rate is very high (especially on the 7200 RPM drives), rivaling SCSI drives, but are much less expensive than SCSI. 20 GB 7200 RPM Western Digital Caviar drives will run you a bit over $300.
Downside to Ultra ATA drives? The only one I've found so far is that you will eventually run out of room in your box. I can fit two inside mine (maybe three if I take my CD-ROM drive out and make it external), yielding a total of 40-60 GB of space with the big 20 GB drives. If I had the money, I'd go with SCSI and just stack them in a RAID (NT has built-in RAID-0 capabilities).
SCSI drives are the fastest (obviously), but very expensive. Cheapest I've found is Viking UW 7200 RPM drives for $199 (4.5 GB). These are bare drives only, meaning that you get a drive, literally in a box and that's it. An external case runs about $60 or so. But, I'm going to give these new ATA drives a chance. The option of 60 GB of storage for under $1000 is very appealing.
However, if I were you (if I were on a Mac), I'd take a serious look at the new firewire hard drives. These things are amazing. Data transfer rates up to 400 Mbps; 22 GB external, stackable/chainable drives for $799. Seems too good to be true, but they're generating some good buzz.
Hope this helps.
Chris Jolly cjolly@mindspring.com