I can confirm that upgrading the hard-disk on a Videtron 8642 HD PVR does work, even with the new Illico 2.0. I upgraded from the default 500 GB drive to a 1 TB drive. Here's how my hard disk upgrade on the 8642 went.
First I searched this forum to find out what tools I needed to open the casing. Thanks to the previous people that posted this info: I found exactly the set of screwdrivers bits they were talking about at Canadian Tire (Tamper-Proof TORX, Product #25-6272-8 for 15$). This allowed me to easily open the casing. Only 3 screws to remove that are readily accessible from the back of the PVR.
Once the case is open, I was surprised to see that the green tamper-detect-tape that's supposed to link the disk tray to the actual hard disk was not even taped on (it was only sticking to the hard-drive tray). So I figured nobody would ever know I even opened the casing
I then had to remove the screws holding the disk tray and unscrew the 4 screws holding the hard disk. After that, I simply had to disconnect the SATA cable and power and put the new disk in, reverse the steps for the screws and I was done.
I then replugged everything and connected the power cable.
The PVR went through a countdown (displayed on the front display). It took a while until the count down reached zero. After that it when through a few other status and eventually powered down. Then it rebooted.
It then displayed '0CAP' for a while. I figured it might be formatting the new disk, so I let it go without touching anything.
After a while (a few minutes) it then displayed a few other messages and eventually powered down again. At this point there was nothing on the front display.
I waited a while and nothing seemed to be hapenning, so I decided to push the power button. the little power light came on with the 1080i indicator, but no signal on the TV. I waited a while and nothing was happening.
I then decided to turn the PVR off (with the power button) and unplug it. I then replugged the power.
The unit rebooted and displayed the '0CAP' message again for a few minutes.
Then it displayed 'Ait' for several minutes
Then it turned itself off, but I could hear the disk drive head, so i let it go. After a couple of minutes bingo: the clock appeared on the front panel!
I decide to hit the power button on the remote and the unit displayed 'ALLO' on the front display. Nothing was displayed on the TV.
I let it stand like that for some time before I actually figured out it was my TV that wasn't really synchronizing to the video signal correctly
. I turned of the PVR and turned it back on and presto! The Videotron PVR Setup screen was being displayed.
I did the setup and went through the PVR to check the free disk space: 938 GB (115 Hours of HD). Victory!
The hard disk I used to upgrade to 1 GB is the same type of hard disk that was in the PVR: a Seagate 1TB Pipeline HD ST1000VM002 (original drive in the PVR was actually a 500GB model ST3500312CS).
I chose the same model of drive because these drives are made for 7x24 operation and optimized for streaming simultaneously multiple video-streams (so Seagate says anyway). The drive is just as quiet as the old one and cost me $70 on eBay.
I'll record a few shows and if ever I run into any issues I'll come back and post about it.
I'm a happy guy!