Been checking out things here for a while as a guest but saw some guys going down the wrong path and thought I'd share what I know.
@Sedg & HDTVFanatic
Don't waste your time on a 1TB Seagate Constellation 2. Looks AWESOME on paper but you would need to modify the power supply connection to make it work. That drive draws 12v to spin up and doesn't work for a plug & play in the DVR630. The 5v supplied doesn't even wake it up enough for the 630 to recognize it as connected in Diagnostic R.
I might just play around with the power supply to see if there is an easy way to draw 12v for that drive. If so, I don't believe there is a better possibility out there for these machines. If I can make it work I will share.
BTW, the 15mm z height for it JUST clears the case of the 630 without contact. Good thing the fan is right below the drive. ;-)
Not sure if you mean the Samsung that QCK opened the thread with but it is no better than the WD Scorpio Blue 1TB. Both are 5400rpm, 8mb cache drives. I found them to offer okay, but not premium, performance. Just like Sedg stated, the 8mb cache is part of the problem when working the 630/530 hard.
The best performance I've had to date is with either the WD Scorpio Black (WD7500BPKT) or the Seagate Momentus (ST9750420AS). Both are 750GB, 7200rpm, 16mb cache drives and have performed consistently in both the 530 & 630.
Thanks for giving me the idea to dig into my own receivers to maximize recording performance. It always occured to me then I finally got tired of waiting for Shawchoice to step up and deliver better hardware. LOL!
I've actually been able to lock up my playback temporarily with the 8mb cache drives. Record a couple of shows at once and and watch a half hour recording across a program shift to 2 more recordings. (i.e. two 1hr recordings at 7pm then two 1 hour recordings at 8pm while you watch your 30 minute recording from 7:50pm to 8:10pm)
I've yet to see it happen on the 16mb cache drives.
Not that this occurence is going to happen often (unless you have a bigger TV addiction than our household, LOL!) but when it does it can occasionally push the device into a reboot.
Hope that helps out anyone on the fence or unclear onthe HDD upgrade info.