On Sun, 2023-12-24 09:22:33 +0100, Jan-Benedict Glaw <jbglaw%lug-owl.de@localhost> wrote: > On Sat, 2023-12-23 12:49:16 +0100, Jan-Benedict Glaw <jbglaw%lug-owl.de@localhost> wrote: > > After swapping terminators and cables, the conclusion is that one of > > the system's SCSI cable's plug doesn't make proper contact to the > > cable. Using a different plug on the same cable (which isn't at the > > "perfect" location though) makes it work. > > > > So I'm now prepared with a 4000/60 :) > > With the HDD image I used on the /90, that 4000/60 is running since > some hours. No network connection, no ntpd. The image is a few months > old, but for finding a misbehaving clock or lost interrupts, that > should be good enough. > > While running idle (~ 3 h), I didn't notice loss of time. Maybe a > second? But no more. (And that's over 9k6 serial...) Running for another day, my /60 lost about 3.5 seconds in a whole day while running GCC in a loop. No further "timecounter went backwards" except the initial one were reported. MfG, JBG --
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