All my 1581s are original DOS 10. The revised version may have fixed this. On Tue, 27 May 2014, William Levak wrote: > > I got a read error on my 1581. I got out my disk utilities to see if I could > read the bad sector. I found part of the directory on the bad sector. With > further manipulation of the disk, I found different data on the bad sector. > The disk was write protected, and I did not write any data. > > Then I remembered that the 1581 has a full track buffer. When you read from > the disk, it reads a full track into the buffer and sends data from the > buffer, until you read from a different track. Apparently, when you get a > read error, it does not write over the previous contents of the buffer for > the affected sector. Subsequent reads for that sector do not give an error, > but give erroneous data. > > > > wlevak@sdf.lonestar.org > SDF Public Access UNIX System - http://sdf.lonestar.org > > Message was sent through the cbm-hackers mailing list > wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2014-07-02 04:00:02
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