Originally Posted by DoubleDAZ
There is no doubt rate-shaping, as you call it, has an impact, but there have been plenty of reports where the glitches simply went away once the SATA drive was disconnected and recording reverted to the internal drive. I'm sure both things are at play depending on location, drive, etc. It's always recommended that folks disconnect the drive to see if the glitches go away. This would point to a drive/connection problem vs rate-shaping.
Also, with larger drives, there might be a speed problem causing glitches as the drive fills up. I know that doesn't really make much sense, but we don't know exactly how the data is written to or read from the drive. We know how PCs do it, but not specifically how the 8300 does it. Lack if definitive info always leads to speculation and some (heated) discussion.
I can personally attest to this. I had a seagate external SATA drive hooked up for nearly a year, and dealt with 1-3 "glitches" every 30 minutes.
Of course I eventually filled that drive up and needed a bunch of space when I was going out of town for the weekend, so I bought a 2nd hard drive (a Western Digital, touted in its specs as being "rated for streaming video" or something like that) so I'd have enough space to record the entire UHD coverage of the Live Earth concert while I was away.
And now I've left the WD hooked up because I am experiencing none of the glitching I saw with the Seagate.
Go figure.....Same SATA housing, same power supply, same cables, same SA8300HD running the same version of Passport -- just MUCH smoother operation with a SERIOUS reduction in glitches.....
(BTW -- my info is in the database)
As a side note, I have ALWAYS noticed smoother operation (less chance of "glitching") when whatever program I'm watching has recorded to the internal drive (which happens when your internal drive has more free space on it than your external drive). My external housing has a light on it that blinks when it's being accessed. You can tell which drive any program is on in the following manner:
1. Tune both of your tuners to "non-recordable" channels (in my area, I tune one tuner to an "on demand" channel, press "swap", and then tune the other to a different "on demand" channel). This will stop your 8300 from buffering.
2. Note that the drive light (assuming you have one) on your external should go out.
3. Select a program to play back. If the drive light blinks while it's playing back, it's on the external drive. If it doesn't, it's on the internal drive.