2.11BSD on two RL02 drives? Probably not, but...

David Bridgham dab at froghouse.org
Fri Aug 4 12:17:08 CDT 2017

On 8/4/17 05:49, systems_glitch via cctalk wrote:

> Going with SLC/"industrial" Flash is indeed the key to avoiding random
> failures. I have many deployed systems using industrial Flash modules (IDE
> DOMs)

As Noel said, he initially talked using an IDE interface for the QSIC. 
I proposed SD cards to solve two problems.  First is that we were
worried about FPGA I/O pins.  Since we've decided we'll have to go with
a BGA part anyway, that problem has been dealt with (though we'd have to
think about how to wire it into the prototype board we have).   The
second was the 5V/3.3V issue.  Obviously that's fixable, we had to do so
for the QBUS interface, but it's always easier to not.

Dave Conroy told me about using these industrial flash IDE modules on
his PDP-10/x and running them on 3.3V.  That's great except it does
nothing for the people who want to run their old stock of IDE disks.

So my question is: do industrial SD cards exist?

I don't think I'm up to going with a higher-end FPGA and trying to
implement SATA even though in many ways I think that's the right
answer.  If there's a SATA PHY chip, that's a maybe.


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