DECtape reliability?

Doug Ingraham dpi at
Thu Nov 12 09:39:13 CST 2015

I've got over 200 DEC tapes written before 1973 and there are just a couple
where there is any issue.  Those with issues have severe wear of the tape
surface.  They were system tapes that were in constant service.  Usually
you get a couple of cycles of shoe shine and it manages to read anyway.  It
is entirely possible that a rewrite of those sectors would clear the issue

They are pretty reliable.


On Thu, Nov 12, 2015 at 6:24 AM, Tom Moss <tomjmoss at> wrote:

> I've had very mixed (about 50/50) success with 9-track, but after reading a
> bit about DECtape it looks like they should still be holding up nicely.
> Anyone care to share their experiences?

Doug Ingraham
PDP-8 SN 1175

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