26 Nov
2008
26 Nov
'08
2:18 p.m.
Curtis H. Wilbar Jr. wrote:
Jules Richardson wrote:
Yeah, I tested against good boards in a vintage setup (with and without
swapping in ROMs from a working board). The only other possibility would be
that the timing constraints changed vastly between different board revisions
and that was tripping me up.
Incidentally, I kept finding DoA Adaptec ACB4000
bridges - anyone else
had the same issue (and is there a typical failure mode for them)? I
had a few of them kicking around so just labeled the dead boards up
and shelved them, thinking I might get around to trying to fix them
one day. Perhaps there's some common fault that affects them, though...
You sure they are bad.... You definately won't plug it into a modern SCSI
bus/
OS, and be playing with MFM drives plug and play....
Been there, done that :-) I did have a brief muck around with that a few years
back, but the Linux SCSI code is rather spaghetti-like. the boards I believe
will work - but from what I recall, Linux marks anything offline that doesn't
respond to the Inquiry command and then won't let you go near it.
I suspect that the HBA doesn't care, so long as the board is SCSI rather than
single-target SASI - and in theory it might be possible to hack the Linux
kernel to not offline the board at boot time (and then be able to throw
commands at it post-boot via the sg interface).
Linux did have
some support I believe for this... but it may not be in there anymore.
Not sure - it did have support for a few ST506 boards once (not sure if that's
still true), and there was some "third party" code for supposedly driving one
of the OMTI bridge boards - but it was written against such an old kernel that
there was no hope of integrating it with a reasonably modern one.
cheers
Jules