Does anyone know whether there is anything I can do to recover lost disk space on the Homecast HT9200DTR PVR without reformatting the HDD? For example, booting it into DOS and running chkdsk or connecting it to a computer and trying something?

In the latest regular Homecast brain-fart, the machine managed to record a program and consume 172GB of disk (all that was left).  I deleted the program but it did not free the space.  Now I only have a few percent space left and a bunch of programs that I still want to watch eventually. So I don't want to reformat the HDD.  Factory reset had no effect.

thanks