Agreed that it may be the drive. When I've seen issues across a bunch of disks all of a sudden, usually a quick swab of the head clears the issue up. For some reason this happens more with my Apple II than my Atari, but I think its because more of my Apple II disks are of questionable condition. Which brings me to my next point, it could also be the brand of disk. Buying NOS 3M disks, I've not had a bad one yet. I have some NOS Control Data disks which make nice decorations... Good luck! --Jason On Wed, 19 Apr 2017, Jeffrey Brace via vcf-midatlantic wrote:
Perhaps it is not the disks, but the drive. Have you tried formatting different disks from a different batch and got the same result? Also, I wonder about the density of the disks. Are they the same? I know that with some compatibility issues with some drives not working with single density, double density and high density.
On Wed, Apr 19, 2017 at 12:27 AM, Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I went to format 5.25 disks from a NOS box still in shrink wrap. There were 11 disks in the box ("pay for 10, get one free"). Every disk resulted in a track error at a different track.
If you can't trust never-opened disks to be good, then how do you acquire disks?
Is there any good software to repair the errors?
________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)(3) educational non-profit
evan@vcfed.org (646) 546-9999
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-- Jeff Brace - ark72axow@gmail.com Sent from my Commodore 64 ========================================================