On May 28, 2025, at 1:15 PM, Al Kossow
<aek(a)bitsavers.org> wrote:
On 5/28/25 12:58 PM, segaloco via TUHS wrote:
Hello everyone, I'm just putting feelers out
for a potential data recovery
project that may have some UNIX history nuggets hiding somewhere. I just closed
on this
Talk to Bear Striklin (
typewritten.org) who has extensive RECENT experience recovering
QIC tapes
It’s true.
Nothing I’ve tried has been truly reliable in terms of dealing with the inevitable
mechanical problems arising from age related decay of these carts. They are an absolute
disaster, easily an order of magnitude or two worse than TK50 ever was. Honestly I’d
sooner face the task of recovering a stack of 100 TK50 carts than face another 5 DC600
QICs.
That said:
I have recently worked out a process that looks promising. But I’ve also had this
experience with DC600 more than a handful of times, and each time, in the fullness of
time, it turned out I had just gotten lucky in some specific regard.
It’s worth noting that sometimes, carts have survived into their senescence without
succumbing to the worst of the mechanical troubles. Those tapes are easy, one pass, get it
done, move on with life. When that _hasn’t_ happened, the process is utter hell. I can
tell in about twenty seconds by visual inspection which category a tape is likely to fall
into. Some brands are better than others, but this is still no guarantee.
If it turns out this new process is actually reliable (and is not just revealed to be
another form of roll-the-dice) I will share it. It’s better for everyone if I’m not the
only person doing this work. It’s nowhere near a science, but art can still be practiced
and passed on.
I am currently sitting on a backlog of more than a thousand carts, both mine and others’,
with no viable path to clearing it within the next year. So I am not taking on any more of
this sort of work, for the moment. It’s not impossible I could start taking work again,
but I can’t promise when that might be.
ok
bear.