![]() ![]() RWAP wrote:Formatting HD disks as DD disks has always been problematic and unreliable when switching between disk drives.Ĭould you please specify what exactly do you mean with "problematic and unreliable"? I've been using and formatting only hole-covered HD disks to Qdos DD (TrumpCard) for years and yes, many have been used for 20-30 years and a percentage of them sometimes fails. Formatting it on the old QL makes that work again here, reliably.Īnd, yes, QPC (as of 4.0 and later) is not really low-level formatting the disk - It does not wipe the data on the existing sectors, though, just empties the directory and map, apparently (the process is just way too fast for really touching all the sectors). Not sure what's the reason, but I have made the experience that I cannot get a HD disk to properly format (in Windows) on a HD drive as DD when it was previously formatted by my original QL's DD drive (Even if my HD drives work reliably otherwise). It just wipes the data on the existing sectors. one being 80 trace, and the other 40 tracks.Īlso I don't think that the later QPC2's, (Version 4) Actually format the floppies any more. ![]() The difference in capacity being the number of sectors per track.Īre you thinking of the old 5.25" disk drives? Where the tracks were narrower on HD drives than DD drives. Such disks either need to be erased entirely using a (very) strong magnet or need to be re-formatted on a DD drive.Īre you sure? DD and HD 3.5" drives are both 80 tracks. The tracks are wider on DD and a HD drive is not able to erase all of the information the DD drive has put on the disk. You cannot re-format a disk that was originally formatted on a DD drive on an HD drive. ![]()
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