@wm_cheng, please don't post the same questions in multiple threads - read the rules on cross-posting. I've merged your threads.
The Fibe TV boxes do not have an eSATA port and do not support external storage at this time. The Fibe TV PVR has a 320GB hard drive. Fibe TV uses MPEG-4 compression which takes much less space than the MPEG-2 compression that Rogers uses.
The guide is accurate to the minute, if a program ends at 9:02, the PVR will record to 9:02. Actually the PVR uses soft-padding - it starts 1 minute early and end 2 minutes late. You can manually add extra time to the end of a program such as sporting events. If the schedule is wrong because of a earlier sporting event going overtime and throwing off the rest of the schedule, the PVR can't correct for that on the fly.
The scheduler doesn't use the program title. Mediaroom uses the Tribune Media guide data just like TiVo. It contains a unique program id for scheduling (which you can't see). If you schedule a series, all the episodes are put into a folder to keep them together.
You have a choice of "First Run" or "First Run and Rerun". It will not record an episode if it has already been recorded. However, if you watch an episode and delete it, it will be recorded again if it plays again in the same week as a "First Run".
If you disconnect your Rogers service it may be possible to watch recorded programs for a limited time such as 30 days. The best way to do this is to disconnect the coax cable from the PVR the day before the service ends so Rogers can't deactivate the box. The best place to ask questions about Rogers PVRs is in the Rogers forum. Here's a thread on the topic:
Cancelled Account: Access to 8300HD PVR