The pdu tag has no wiki summary.
-4
votes
0answers
25 views
PDU for Automatic repeat request protocols [closed]
Which PDU should be used when talking about the automatic repeat request protocols? i understand:
Data (Application Layer 7)
Segment (Transport layer 4)
Packet (Network layer 3)
Frame (Link layer 2)
...
21
votes
5answers
3k views
Best practices for power cabling racks in DC
With network cables it is easy. I use velcro-ties, coloured cables, 0U vertical cable organizers from APC on side of the rack -- easy and neat.
However with power cables it was always giving me ...
0
votes
1answer
89 views
L6-20P PDU with 5-15 or 5-20 Plugs? [closed]
Is there anyone who makes a PDU with L6-20P input, but normal 5-15 or 5-20 wall style ouput plugs? Everything I see has those annoying C13 or C19 on them when you go upto 208V-230V input voltage?
6
votes
2answers
2k views
How to step down voltage from 208V to 110V
I have some racks that will be fed by 208V/20A circuits. These circuits will be conditioned and battery-backed by the facility in which these racks will live. 99% of the devices in the rack will be ...
3
votes
1answer
181 views
PDU management interface has low availability - product flaw or isolated issue
Our colocation provider has supplied us with APC AP7932 switched 0U PDUs as part of several cabinets they provide us. We have had a lot of trouble with the network management aspect of these PDUs, ...
6
votes
2answers
238 views
Source of PDU De-Rating?
In researching PDU's I have noticed most cite a derated current at the 80% level. For example, 30A is derated to 24A:
Tripp Lite:
Raritan:
Does anyone have anything that shows what agency this ...
1
vote
1answer
88 views
Correct UPS and PDU sequence
I'm pretty inexperienced when it comes to setting up power for a network rack. I have a location that has a dedicated 20 amp circuit with a LP-20P socket. I have a APC UPS 3000XL rackmount UPS and a ...
0
votes
1answer
156 views
APC switched PDU rack, lost state after reboot or power loss
I have the following:
We have a few APC 7920 PDU's
Using POWER IQ to control the PDS's via SNMP 1/2
Using also Mobile Power IQ to control the PDU if need via iPad/iPhone
I am in the process of ...
0
votes
1answer
83 views
Metered-By-Outlet-Monitoring PDU [closed]
I see APC offers Metered-By-Outlet PDUs, however they only offer 30A - 32A 208V PDUs. (URL: http://www.apc.com/products/family/?id=478)
We are looking for a 16A 120V PDU that offers power usage ...
5
votes
1answer
148 views
Using Y split cables to connect two servers to a single PDU receptacle
We have bought a few 30amp 208v PDUs that only have 9 receptacles. The servers we are connecting to those PDUs will not use the full 30amps (at 80%, or actually 40% since we use redundant power) so we ...
10
votes
2answers
818 views
What is the difference between a PDU and a power strip (both 120V, 15A)?
I just chatted with an APC rep about upgrading the UPSes at our office. She recommended a single higher-capacity 6-outlet Smart-UPS to replace the four Back-UPS units we currently have. When I asked ...
1
vote
0answers
74 views
Manage Multiple PDU's [closed]
We have a few PDU's APC 7920 and soon we are getting some 9xxx.
Is it possible to manage all PDU's from a central software, turn on/off etc? If so, what would be a good software to use?
1
vote
3answers
312 views
Are there any “Zero-U” PDU's that allow for power management/remote power control
I can't seem to find any PDU's (in general) that fit a 24U server rack that don't require at least 1U of rack space. (I'd prefer Zero-U) that allows for remote 'reset' of the power ports as well as ...
2
votes
1answer
114 views
Liebert MPH SNMP Poweroff
Super specific question, but here it goes.
We have several Liebert MPH rack PDU units with the necessary Liebert 'RPC' cards intalled to allow for SNMP polling. Does anyone have experience with ...
6
votes
6answers
267 views
Things to consider when buying PDUs
I am thinking about getting new PDUs for my racks. I would like ones that are:
Metered (Maybe remote monitored)
Vertical
Meet my power requirements (Voltage and amperage)
Right number of outlets ...
3
votes
5answers
474 views
A plan to mitigate PDU failures?
A client just experienced a complete failure of an APC AP7911A switched/metered rack power distribution unit. This obviously took all of the connected equipment down with it. The equipment is fine, as ...
1
vote
3answers
540 views
Cold Booting a Server over IP KVM - Which Type of PDU is Required?
If I get an IP KVM, what type of Power Distribution Unit (PDU) would I need in order to perform cold boots of a server? Would I need a switched type of PDU or will any PDU be okay?
I am looking for a ...
0
votes
3answers
429 views
Rack smart pdu choices? [closed]
We currently have apc PDUs on our racks at the datacenter. Not really happy with the mounting bracket options. Also, I feel that remote management could be a bit better.
Any suggestions on any other ...
0
votes
2answers
590 views
How does the Belkin OmniView Remote IP Manager (IP KVM) do Hard Reboots?
I am looking to get an IP KVM for a single server.
The features tab on http://catalog.belkin.com/IWCatProductPage.process?Product_Id=291011 shows that the OmniView Remote IP Manager can do hard ...
2
votes
1answer
114 views
PDU With Configurable AMP Limit
I have a 20 AMP/120V circuit. The only device plugged into this circuit is a 1000 Watt Dell UPS. Right now several devices plug directly into the 1000 Watt UPS.
I wanted to order a PDU to help ...
1
vote
3answers
565 views
Is it possible to use mixed 110V / 208V power on a single server with dual power supplies?
Is it possible to run a dual power supply server with one PS plugged into 110V, and the other power supply plugged into 208V? We've asked the vendors and they say they've never tested it or some other ...
1
vote
3answers
591 views
Will a NEMA L5-20P plug work in a NEMA L5-30R receptacle?
I need to purchase a UPS & PDU and want to know if they will be compatible. Will the plug of the PDU be able to plug into this UPS?
The UPS: APC Smart-UPS X 3000VA Rack/Tower LCD 100-127V with ...
0
votes
1answer
394 views
Running IBM servers at both 110v and 220v at the same time for a few seconds for power migration?
In our data center we are going to be moving all of our dual power supplied IBM servers (auto sensing 110/220) from an outdated 110 system of dumb power strips to an updated in rack 0u 220 monitored ...
10
votes
4answers
473 views
Proper Sizing for PDU's/Power in Rack
I've struggled with sizing my power sources and associated PDU's in my server racks. Somehow I feel like I'm way oversizing things based on nameplate requirements on power supplies.
My simplistic ...
0
votes
2answers
1k views
Switching from 120v to 208v power
We are going to switch from 20 amp 120 volt to 20 amp 208 volt circuits in our colocation facility. I am new to dealing with anything other than standard 120v power, so I am unsure of some intricacies ...
2
votes
2answers
520 views
APC switched rack PDU: Startup outlet state
I have an APC Switched Rack PDU powering a number of servers in a remote datacentre. After a recent power outage, I noticed that the outlets did not automatically default to the On status once power ...
2
votes
5answers
583 views
Power strategy for first server rack
We are about to install our first server and networking rack at my office. I'm more of a programmer than a sysadmin, so I'm learning as I go. Let me start by saying that it's just a router, patch ...
0
votes
2answers
76 views
Lowering power circuit at data-center, please help clarify what PDU I need
I have the following question:
We have a rack at a datacenter with a 208V/60 amp circuit coming into a 208V/60 AMP PDU and I was wondering if we lower the circuit to let say 208V/30 amp or 120/30 amp ...
4
votes
1answer
1k views
PDU says to ground to rack with “thread making screw”.. this is impossible?
I'm trying to use the 'thread making screw' to ground my Dell PDU to the Rack, however the metal on the rack is impossibly hard. Is this even required? The included screws don't even seem "thread ...
0
votes
2answers
860 views
APC - PDU web-interface demo
Where can i find a demo of the web-interface for Managed PDU's from APC (i'm interested in geting a glimpse at the features) ?
Mike.
