Originally Posted by Compubooth
I do recall there are conditions as you suggested. I did have a large number of titles and for that reason I recently divided several titles, performed many edits, and deleted a number of titles. I made these changes a short time before the 2160A froze up on me a couple of days ago (reference my posting #12061, originating date of 11/28/10).
I don't know about the 2160A but I have had troubles when Title Split was used on my Philips 3575 and 3576.
I can't prove it, but I believe that Title Split on those units often creates shared blocks. (The block where the split is set will almost always contain data needed by programs on both sides of the split. If the software does not create a duplicate of the block, so that one copy can be assigned to each of the file pieces, I believe there is impending trouble. Note that everthing will look fine while both programs are untouched.) If there is a shared block, it is vital that all pieces of the split title are deleted without any intervening recording to the HDD. There could even be danger using scene delete on a piece of a split title, since the deleted scene could free a shared block. If a shared block is released by a File Delete or a Scene Delete, and that block is recorded on, it would corrupt the remaining program that shared the block, and the block would again be shared by 2 programs.
I suspect that the only way to get rid of a shared block is to delete all programs that share it without any intervening recording to the HDD. (This can be difficult since it may be difficult to identify all of the programs that contain any shared blocks. The sledge-hammer approach would be to save everything you can from the HDD, and then erase it completely. Important: Don't do any recording to the HDD during the clean-up process
.) Otherwise, the first delete will release its shared block, a new program could record on it, and the other program that shared the block would become corrupted, and again 2 programs would be sharing the block.
If some sort of quick file scan is performed during start up, and the HDD has programs with over-written blocks in them, the scan might encounter problems, which might explain a freeze.
If the unit has been deprived of power long enough, it may use a different start-up routine, which may include more robust tools.
Of course, this is just my theory. I cannot prove it. I can only say that it is consistent with my experience. Since there may not be any problems when using Title Split, even if my theory is completely accurate, it is very difficult to test. Probably, it would require a skilled tech person with access to all the code, to see if there is a bug in Title Split, on some or all of the models, and whether there is a way to use it without risk of file corruption. It may be very difficult to get facts about the Philips units. Perhaps 234 can find out which, IF ANY, Magnavox/Funaii units have a Title Split bug similar to the one I theorize to exist in the Philips units.
I have never seen the start-up freeze that you are experiencing. I have detected program corruption when attempting a dub, or attemting to play a program that had played before. In the case of the dub problem, I always found one of the programs I was attempting to dub would not play all the way through, even though it had, in the past. I suspect the troubled program had a shared block in it, which had been overwritten between the time it had played OK and the time when it would no longer play.