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 listReceived on 2014-05-27 12:03:31
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