9 Nov
2005
9 Nov
'05
11:02 p.m.
Sridhar Ayengar schrieb:
Sebastian Br?ckner wrote:
Well... that could be the cause. I'm running the machine off a 16A fuse
although it is designed for 25A IIRC.
Of course the fuse could blow on power up but I didn't expect that to do
any damage to the power supplies... maybe that was a very bad idea(tm)?
I know that those machines are supposed to run
continuously but it
can't be quite normal that every other time I power it up one of the
supplies dies. Any hints? Is there a way to fix those things or to
prevent them from blowing up altogether?
Are you sure that you've wired your premises electrics correctly? That
could cause power supplies to keep blowing. Do you have enough power supplies for the boards and
other options you
have installed in the system? That could be doing it too. Or if you
had a boardset with an unfused short in it or something, although I
would think there's probably fuses in the backplane or something.
After losing supplies with the original configuration (24 CPUs, ~18 SCSI
channels, 1.5GB RAM) I stripped the machine to a fairly minimal
configuration (something like 4 cpus, 512mb ram, no extra scsi). The
problem didn't go away.
Once it boots (and doesn't blow as soon as I turn it on) it runs without
problems. And since it worked in that exact configuration for years for
the previous owner (continuously powered on though) I expect it to be
fully working. He also said that he often had to replace the power
supplies after power cuts, so it might just be normal...
Sebastian