Hmm.. that's what I will try then. I'll clean the heads and try DS/DD as opposed to the SS/DD disks I has tried previously. Quad Density 5.25" disks are hard enough to find as it is. QD 8" disks are probably practically non-existant. I was just so damn happy to find 300 Watt 110V<->220V transformers sitting on the shelf at my local electronics store. It means I've exchanged by last euro-power supply. :) - Bo > > HD disks have the same capacity as QD disks, but they have a different > coercivity. Most 3.5" drives have electronic circuitry to write > correctly to the higher coercivity of HD disks, but can switch to a > mode that will also write correctly to the lower coercivity of DD disks. > 5.25" and 8" drives do not do this. > > Judging from the number of the 8280 drive, it should be analogous to the > 8250 drive, that is Double sided Quad Density (DSQD). Almost nobody uses > QD disks in an 8250. DSDD disks work just fine. > > Another problem arises if the disk is already formatted in an incompatible > format. In that case, formatting a track may not completely erase the > existing format. Reading the track may then result in reading the new > track and the remainig part of the old track at the same time, thus > causing a read error. The fix is easy. Bulk erase the disks with a bulk > tape eraser. > > -------------------------------- > I have been trying to determine which drive mechanisms (manufacturer > and model number) were used in the various Commodore drives. I do not > have information on what drive mechanism the 8280 drive uses. You > obviously have one. Could you provide that information.? > > > - > This message was sent through the cbm-hackers mailing list. > To unsubscribe: echo unsubscribe | mail > firstname.lastname@example.org. > - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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