On 11/4/2019 11:05 PM, rescue via cctalk wrote: > > Been away for some time from the mailing lists.... getting back into my > classic gear again.... > > I have two of these Qumetrack 542 drives. > > While testing my 360K drive collection (8 drives.... I must be slacking > :-) ...), 2 worked, 4 had issue (resolved with a good head cleaning), > and 2 (both of the Qumetrack 542 drives (I have two of them)) have mixed > results. My testing is on a Tandy 2500SX/33 using the Tandy straight > through cable and with the drives set do DS0. > > I seem to have no issue with Dunfield's testfdc (using testfdc/x a:) > with these drives, doing SS and DD and getting 'pass' from testfdc. > > However, when I do a format a:, the drive will format through the 40 > tracks, then instead of the heads returning to track 0 quickly, they do > these small stepping 'bursts' and DOS times out saying failure..... it > probably would have worked if DOS would wait 10 seconds or more for the > drive to move to track 0. > > I've never seen behavior like this. I even tried an external power > supply in case the Tandy one wasn't up to driving the full height floppy > drive due to an aging marginal supply, but that didn't help anything. > > I've now also had one of them shut down the power supply (a shorted > tantalum cap I'm sure). > > I've looked through the manual on the drive, I've tried the HM, HS, and > no jumper setting for stepper motor power, same results in all cases. > > I'm trying too determine if these drives are good. I'm planning on > using them in a Tandy Model III that is upgraded internally to a Model > IV, but I feel these are basic drives and should work in DOS fine too. > > I hope someone has a clue, as I'm tapped out of them currently. > > Thanks, > > -- Curt > >
It almost sounds like your PC could be trying to go beyond the last track. You did include the proper DOS command parameter(s) to tell it the drive type, yes? JRJ
