That's not really the point is it. The amount of storage space available to the customer has changed without notice. The OP was within the limits that have worked since he got the DVR and now the limits have moved.
If the customer had been given notice that'd be one thing, but even in that scenario saying he should just watch his recordings isn’t really very constructive.
I’m not exactly sure how Genie is configured to use disk space but it certainly has the unintended consequence of interfering with the normal use of those that have mostly full hard drives.
I have no idea how Genie works but it seems to want a certain amount of space and will take it as it frees up. The number of subs affected has to be pretty small but it’s got to be frustrating when you don’t know it’s coming and didn’t have a chance to prepare for it.
Most other DVRs can run full with only minor slowdowns. The DVR is designed to automatically delete old shows to make room for new ones, so in theory you should never have to delete any shows. I ran my Tivo like that for a long time.
The HR34 is also designed so that an entire household of 5, 6, or 7 people can record all of their individual shows onto one DVR. I bet that kind of usage would fill it up fast.
I think what's happened here is that these people's hard drive's file systems are now corrupted. The Genie didn't make space for itself gracefully. I would suggest the OP clear and delete everything and start over from scratch. I would also call D* and complain loudly. He'll hopefully get a credit or free service of some kind.