Finally got my G-Tech Q-drive with the new Hitachi 500GB 16MB cache 7200rpm SATA drive installed. Got the nice eSATA II to eSATA II cable from SATACables.com.
Followed the 8300HD manual instructions to the letter.
When I booted the 8300HD with the G-Tech powered up and connected, I got the "Drive found, proceed with format" message. I hit "Yes" and the display went away, live TV signal came up. I checked the DVR menu, no change in "Recording Space Used" level (75%)
Performed soft reboot, it took a few minutes. When I powered the 8300HD back on I got the "compatible external drive found" message. Clicked OK, checked the Recording Space Used level - 15%!
But wait - 160GB internal drive, 15 programs recorded, 75% used = 120GB of recorded material.
160GB internal plus 500GB external = 660GB total. Same 15 programs recorded, 15% used = 99GB of recorded material? How much space does the OS take up? Am I missing something?
Anyway, I checked the live buffering feature, no problems forward or backward.
The G-Tech looks right at home next to my 8300HD, and due to the heat-sink cooling it is ultra-quiet - I can only hear the drive itself, and then only when I put my ear up to the vent holes.
So far, so good.