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Re: Sun Fire V440 problem
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John D Groenveld
Feb 25, 2013, 11:00:15 AM2/25/13
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[followups to comp.sys.sun.hardware]
In article <6oLWs.495053$Gx3.3...@fx11.fr7>,
ChrisQ <me...@devnull.com> wrote:
>A power supply fault should not cause damage to any other part of the
>system,
>unless one of the rail voltages spiked high during the failure, but if
>one of
>the cpu's is showing an abnormal temperature, it's almost certainly faulty
>and needs to be removed from the backplane anyway. Assume that the fans
>are all
>ok and no blockages ?.
>
>The system should run fine on i psu as well, though you do of course
>lose the
>redundancy...
I'm curious whether the OP swapping the two power supplies might help.
I've seen dual PS systems which will limp along with a single fault
but not if the fault is on the first PS.
John
groe...@acm.org
In article <6oLWs.495053$Gx3.3...@fx11.fr7>,
ChrisQ <me...@devnull.com> wrote:
>A power supply fault should not cause damage to any other part of the
>system,
>unless one of the rail voltages spiked high during the failure, but if
>one of
>the cpu's is showing an abnormal temperature, it's almost certainly faulty
>and needs to be removed from the backplane anyway. Assume that the fans
>are all
>ok and no blockages ?.
>
>The system should run fine on i psu as well, though you do of course
>lose the
>redundancy...
I'm curious whether the OP swapping the two power supplies might help.
I've seen dual PS systems which will limp along with a single fault
but not if the fault is on the first PS.
John
groe...@acm.org
ChrisQ
Feb 26, 2013, 6:42:56 PM2/26/13
to
On 02/25/13 16:00, John D Groenveld wrote:
>
> I'm curious whether the OP swapping the two power supplies might help.
> I've seen dual PS systems which will limp along with a single fault
> but not if the fault is on the first PS.
>
> John
> groe...@acm.org
I couldn't say for the 440, but if they are in a master slave config in
>
> I'm curious whether the OP swapping the two power supplies might help.
> I've seen dual PS systems which will limp along with a single fault
> but not if the fault is on the first PS.
>
> John
> groe...@acm.org
terms of the voltage sensing, then there could be side effects.
One old Netra machine that came in a load of kit from auction had 3 psu's,
all 48 volt and it wouldn't run with less than 2. I guess the telcos were
far more demanding.
The V440 is a bit of a power hog though and there aren't enough disk slots
for such a large chassis either. Well engineered pice of kit, but even with
a single cpu, power consumption is around 200 watts, which rises steadily
with each added cpu to 500 watts with 4 x 1.6Ghz processor modules. A V240
or 245 is a much better bet in that respect...
Regards,
Chris
John D Groenveld
Feb 26, 2013, 7:08:01 PM2/26/13
to
In article <5MbXs.301425$vT3.1...@fx04.fr7>,
and the CPUs relied on the PS0 fan to exhaust heat.
John
groe...@acm.org
ChrisQ <me...@devnull.com> wrote:
>I couldn't say for the 440, but if they are in a master slave config in
>terms of the voltage sensing, then there could be side effects.
I suspected airflow; that there was a mechanical design problem
>I couldn't say for the 440, but if they are in a master slave config in
>terms of the voltage sensing, then there could be side effects.
and the CPUs relied on the PS0 fan to exhaust heat.
John
groe...@acm.org
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