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Possible PSU problem?

S

sp00

Limp Gawd
Joined
Apr 8, 2003
Messages
351
I have this system at work which suddenly crapped out over the weekend and I can't figure out what's wrong with it. I was wondering if the powersupply could be the cause.
Specs:
P2 450mhz
384 PC100
5x 160gb Hitachi HDs in Raid 5
Highpoint RocketRaid 404
20gb HD
TNT2 vid card
Cheap 100mbit NIC
CDROM
Floppy
1x 120mm fans
It's powered by a 350watt Antec SL350.
It will power up, but only 3 of the 5 raid HDs will show up. Could this be an issue of not having enough power? The other thing I noticed was that one 120mm fan was spinning realy slowly, but this could be caused by a bad fan (or not enough power)...
Help!?
 
loosing 2 drives in a RAID5, man I feel your pain
that supply is rated at 16A on the +12V rail
if it was running it previously well any supply can develop issues
youve got at least 12A on spinup (+ fans and with out the optical)
and you need to derate the supply for operating temperature, but at spinup that wouldnt be much so not as bad a contributing factor

Id ask can the controller do a delayed spinup?
and how many fans of what size are spinning up as well?
If this is a new build, well yeh it could be over taxing the supply
depends on the ambient at spinup and additional load on the +12V rail


I migrated my NAS last weekend, adding new components ect
and had a drive drop out of the array, ended up being a bad connection
so if you can swap around the power leads, and reseat the cables
till you at least get one of those drives back online youll be unable to see if its some other issue (like a CRC failure)
 
Ice Czar said:
loosing 2 drives in a RAID5, man I feel your pain
that supply is rated at 16A on the +12V rail
if it was running it previously well any supply can develop issues
youve got at least 12A on spinup (+ fans and with out the optical)
and you need to derate the supply for operating temperature, but at spinup that wouldnt be much so not as bad a contributing factor

Id ask can the controller do a delayed spinup?
and how many fans of what size are spinning up as well?
If this is a new build, well yeh it could be over taxing the supply
depends on the ambient at spinup and additional load on the +12V rail


I migrated my NAS last weekend, adding new components ect
and had a drive drop out of the array, ended up being a bad connection
so if you can swap around the power leads, and reseat the cables
till you at least get one of those drives back online youll be unable to see if its some other issue (like a CRC failure)
Click to expand...
thanks for the reply!
I can't get the controller to do a delayed spinup cause it's freaking out about the missing drives and will only let me power it off. :(
I'm running 2x 120mm fans and 2x 80mm in the PSU.
The system has been stable since July when I built it, so that's why I was thinking the PSU was having issues. The normal ambient in the room is about 73F.
I've tried changing the powerleads around and reseating the cables.
i'm thinking about buy a Fortron 530W Power Supply, Model "FSP530-60GNA" and seeing if that'll help it.
Thoughts?
 
I am guessing that will solve the issue. However no gurantees as cases with PSU varies. At least u know your sticking to some good brand should see results.
 
well those fans add from 1.25 to 2A at spinup (depending on their make and rpm)
so say 14A and yeh derating the supply for temperature from 16A you could be overtaxing it even at spinup, they are able to deal with peak draws for short periods of time, but too much of that can be a contributing factor in developing a problem
I assume that this is a server and is "mostly" up, so it might have taken awhile to develop (fans and drives drop to about a quarter of their draw once spinning so then there would have been plenty of power) that CPU and most of the rest of the components are unlikely to be using the +12V rail at all


the FSP 530 is a workhorse of a supply, personally my favorite "value" choice in an ATX12V v1.3
used one in my brothers box
its +12V amp rating is "mysterious" with 16A nominal and 28A peak
very unusual, but its likely how it crossloads
as to if it will "fix" the problem....
if its a power issue it ceratinly will, it has more than enough amps
as your nowhere near able to create a serious crossload with that config
at this point however even if it was a power isue,
it could have led to corruption and you might need to do a baremetal restore.

personally Id temporarilly hook up a known good supply to test the theory
and try to bring the array back online, before purchasing

Good Luck ;)
 
Ice Czar said:
personally Id temporarilly hook up a known good supply to test the theory
and try to bring the array back online, before purchasing
Good Luck ;)
Click to expand...
Yeah that was my initial thought as well, but I don't have any sapre PSUs that I think are good enough (only a bunch of older (like 4 years) Dell machines) :(
I don't mind spending the money to get a known good PSU (then I have backup in the event that it's not at fault).
Thanks for all the help. I'll post when I find out what actually happened.
 
Well, got my new PSU and it didn't solve the problem... :( Guess it's either the HDs or the riad controller.
 
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