> On Nov 12, 2015, at 8:47 AM, Johnny Billquist <b...@update.uu.se> wrote:
>
> On 2015-11-12 14:24, Tom Moss 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?
>
> Not sure what there is to share. I've yet to encounter a DECtape I couldn't
> read.
You're right, DECtape is extremely reliable. That makes sense: the tape is a
sandwich, with the oxide underneath a mylar cover.
My boss in college (a former and subsequent DEC OS developer) told me the same
thing you did, that he'd never seen a DECtape fail. Not even the one that was
accidentally laundered (in some pants pockets), or the one that came loose from
the hub and rolled all over the sawdust covered floor of the DEC mill building.
But I told him that I had seen some fail, and he saw it too. This was in
college. We had an early RSTS system where DECtapes were used as public
storage (to supplement the RK05 system disk). Those were so busy that they did
eventually wear out. Sometimes they could be reformatted to bring them back to
life, sometimes not.
And yes, between the redundant tracks and the physical construction of the
tape, you should expect DECtapes to be perfectly readable even today.
paul
