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Questions tagged [power-supply-unit]

Questions related to power supply units, aka PSUs

PSU is an acronym for Power Supply Unit.

172 questions
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ipmitool sensor: does not detect backup power supply

Why doesn't ipmitool detect my second power supply? I have 2 powersupplies plugged into my machine, but calling ipmitool sensor only shows PS1: :~$ sudo ipmitool sensor |grep PS PS1 Status | 0x1 | discrete | 0x0b00| na | na …
kevlarjacket
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How many power circuits do I have in a rack?

I'm planning to get some colocation space from someone in my area, and like most companies that offer colocation, ask about power supplies (of course) in the quote form. I'll need a power of 1000W per 4Us. So, basically I need a 110V-15AMP circuit…
XCore
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Does the additional load on UPS in case of grid failure amount to 100%?

The scenario is as follows: Servers are equipped with two PSU's each. One of these is connected to the UPS, the other one directly to the power grid (bypassing the UPS). I would assume that since the PSU's are redundant, load is more or less evenly…
Roman
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Redundant UPS with 2 power sources

I've 2 power sources in my house: One from the national power grid and another from an internal power source. I've several power sockets in my server room from these 2 sources. Did some research and I was unable to find a UPS systems (at a…
Mário
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HP ProLiant server - PSU error despite replacing PSUs

We have a HP ProLiant ML350 G6 server causing us a few problems. The main symptom was that every so often we would find the server simply powered off. We turned the machine back on and investigated to find that one of the PSU fans had started…
turbonerd
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5-pin 4-cable connector on SuperMicro server PSU?

I have a 4U SuperMicro SC847 Chassi that comes with redundant 1400W power supplies. All of the internal power cables (ATX, ATX12V, HDD and such) are connected to two circuitboards where the back of the power supplies plugs into. There is also a four…
tlund
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HP Proliant ML310 G4 power supply warning

One of the two power supplies in my HP Proliant ML310 G4 server has an amber/orange LED lit in one of the power supplies on the front panel. Also, the wave symbol is flashing in orange/amber. When looking on the backside of the server only one of…
Björn
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Anti surge protection

Great site - my first posting! I support a number of small business for all things computing. I protect the servers with APC Smart-UPS 1000. The do just what they were bought to do. However, I dont protect any of the workstations. Recently we had a…
Grimbo
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Chasis reset button vs remote power recycle

Ocassionally one of my remote windows servers locks up and must be restarted by pressing the restart button on the front of the case. Since I work remotely I call a coworker to press the button. I would prefer to restart the machine remotely by…
steampowered
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A plan to mitigate PDU failures?

A client just experienced a complete failure of an APC AP7911A switched/metered rack power distribution unit (PDU). This obviously took all of the connected equipment down with it. The equipment is fine, as well as the upstream UPS units. In…
ewwhite
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How much power draws a redundant PSU?

One supermicro enclosure comes with "3 SP382-TS 380W Power Modules for a total of 760W". 2x380W = 760W, okay, but there are 3! So where is the missing third 380W equalling to 1140W?? Is it hot-sparing, kicking in when one dies? What wattage is…
isync
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A/B Power Configuration for Server Cabinet

I'm upgrading our cabinet at our colocation for A/B power and wanted input on which of our options are good or bad. First, a bit of an overview of our setup: We currently have a single circuit feed into our cabinet. We have a few servers that are…
Dan
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Power reading 2 amps with 13 servers?

We have a rack in a data center and we became suspicious of running out of power. But our power bar says 2 amps! It has a live indicator, so it's not just one reading. Do you think there's something wrong with the powerbar? Worth mentioning: Until…
Jay
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Software to measure power draw of HP Server

I'm after some software to measure the power draw of a HP Server, namely a DL360 series. I know Nagios is used for logging and monitering but I'm not sure if it logs power usage as well. I've also tried to find the HP Server Management package but…
tombull89
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Does a higher-wattage PSU automatically draw more power?

Does a higher-wattage PSU automatically draw more power in comparison to a lower-wattage PSU even if the components fed by the PSU remain the same? The reason I'm asking is that I'm thinking of getting a PSU with more wattage than currently…
AX1
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