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2
votes
3answers
57 views

What functionality does smartd lose when disabling state saving or attribute logging?

I'm trying to let my backup server have its disks in standby as often as possible. Outside of smartd or actual backup usage, the disks currently spin up once per day (various cron tasks). smartd, by ...
0
votes
0answers
17 views

Dell 2950 - extra AMP connector to power up HDDs

I am running 5 external HDDs in an enclosure that takes SATA cables + 2 AMP connectors. As I am not using any extra peripherals, I am sure that there is more than enough power in the 2950 to deliver ...
6
votes
8answers
20k views

VMware ESXi shutdown triggered by APC UPS connected via USB

I am shipping a bunch of ESXi 5.1 servers to remote offices where they will be powered via APC UPS. I would like to have the UPS trigger a shutdown of the connected server - I would then rely on the ...
2
votes
1answer
37 views

After UPS battery replacement (HP R/T 3000)

has any one had experience with this UPS? i have replaced the batteries but have't ran self test yet, if i run self test is there a risk of powering down the machines the UPS powers? just wondering ...
1
vote
1answer
79 views

configure power restore policy HP ProLiant BL2x220c G6 [closed]

After each reboot my server automatically powers on: Power Overload : false Power Interlock : inactive Main Power Fault : false Power Control Fault : false **Power Restore Policy : ...
0
votes
1answer
43 views

Guest VMs Unknown after power outage on HP VSA

A remote office had a power outage tonight. When the power came up, both the Physical DC and the Physical ESXi Server came up. Connecting to vSphere, I can see the HP-VSA has started, but the other ...
4
votes
1answer
143 views

Heat generated by a HP ProLiant DL380p Gen8 entry EU servers

I have to buy a stand alone server rack to be placed in a machine room. The temperature can reach 30°C in the room (I have no choice with regards to the location). In order to correct for this I will ...
5
votes
3answers
488 views

Floppy power to PCI-E card in DL380 G5

I have an HP DL380 G5 server and a PCI-E card that I need to use in the server. The problem: the PCI-E card requires additional power from a 4-pin floppy connector, and the HP DL380 G5's PSU has no ...
3
votes
5answers
866 views

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 ...
9
votes
2answers
3k views

How can I calculate if a UPS is sufficient for my requirements?

I am not that of an electricity knowledgable person, so I'll try to put as much info as possible. I have a Rack Mount UPS of 1800 Watts Model: PRP 3050 RM (in total I have 2 of these - talking about ...
5
votes
2answers
420 views

Which STONITH hardware for power fencing?

I'd like to setup a two node high availability cluster using corosync/pacemaker/drbd. For that, of course, I need fencing. As far as I understand, all IPMI/iLO/... solutions do the job, but only as ...
0
votes
2answers
53 views

my dell power edge 2900 power off after 1- 1.5 hours automatically

my dell power edge 2900 power off after 1- 1.5 hours automatically. the fault of fan speed on the front panel is viewed, but that should not stop the server. i swapped with redundant power supply ...
9
votes
4answers
3k views

Choosing the right AWG for Server Power Cables?

When getting power cables for servers, there are are various AWG (American Wire Gauge) choices to make. The ones I have noticed are 18 and 14. 14 is thicker so will be a little more stiff. But I am ...
0
votes
0answers
30 views

Upgrading memory on an IBM Power 710 Express (8231-E1C)

I have problem with Power 710 Express server 8231-E1C. Server was loaded with 4x8GB (2xEM16) memory on a single riser card. I have replaced with 4x16GB (2xEM32). The firmware is AL740_126. At Hardware ...
1
vote
1answer
521 views

Upgrading memory on an IBM Power 710 Express (8231-E2B)

We have a Power 710 Express server that was loaded with 4x4 GB memory on a single riser card. I have replaced the 4 chips with 4x8GB and put in another riser card and loaded it with 4x8GB more for a ...
-2
votes
2answers
137 views

LogMeIn mess my wake-on-link?

I have windows 8.1 64 bit with an on-board network card (LAN: Intel® Gigabit Ethernet Controller driver for Windows 8.1*) Now - please notice : I have created an Acronis IMG right after installing ...
8
votes
3answers
566 views

Power Cables Required to Switch from 120v to 240v for Dell Poweredge Servers

We have a cabinet of servers and other hardware (switches, firewalls, etc) that all are currently running on 120v. I've confirmed that the power supply for all of our devices support both 120v and ...
12
votes
4answers
564 views

Is there any value in protecting both rack power feeds with their own UPS?

I've done some looking and have not found a satisfactory answer to this question. When is it necessary or suggested to use an independent UPS (on it's own mains branch circuit) for each power feed to ...
12
votes
5answers
1k views

Why is it important to ensure equipment is well-grounded?

I am installing a new ethernet switch, and the instructions say to connect the ground screw to the rack or some other kind of electrical ground. What are the risks of not ensuring that equipment is ...
0
votes
0answers
17 views

Why are wattage/amp numbers not fitting together?

I'm trying to figure out my backup power needs, and I'm having quite a difficult time with the numbers. Pretty much every piece of equipment seems to have wildly varying numbers that don't fit ...
12
votes
12answers
26k views

What is the lifespan of an typical UPS battery?

When using a uninterruptible power supply how long does it preserve the original capacity? Say I buy a UPS that holds the necessary load for 10 minutes - I don't want it to unexpectedly come into ...
4
votes
2answers
418 views

Understanding redundant power supplies

Im looking into the cost of putting a Cassandra cluster into a colo facility. Along these lines there would be 6-8 servers at the outset with expected growth over time. One option is just a series of ...
4
votes
1answer
2k views

Proliant DL380 G7 won't boot, solid amber power LED

I have a problem with an HP Proliant DL380 G7 that leaves me without much in the way of troubleshooting approaches. This server will not boot. It was stored in a datacenter, and I went to retrieve it ...
-3
votes
1answer
53 views

Commodity hardware related, i'm searching for a ILO, BMC, ALOM and in general IPMI alternate solution [closed]

I'm searching for a composite solution to have the same features of an IPMI controller on commodity hardware independently from arch/model and without excessive device dependencies. Essentially the ...
1
vote
2answers
511 views

How to put laptop to sleep with powershell/vbs/wmi/…?

I'd like to be able to put my laptop to sleep from the command line. According to Microsoft, the Win32_Battery WMI class has a SetPowerState method that looks like it should be able to do this, ...
2
votes
0answers
533 views

\FileSystem\srvnet preventing computer sleep

I have what appears to be a pretty common issue. Basically, most of the computers on my company network won't go to sleep. After a lot of testing (disabling shared services, multimedia stream, etc...) ...
3
votes
2answers
399 views

Best practice on Linux servers and CPU/power throttling?

I am running a couple of Debian 6 (2.6.32) and 7 (3.2) Linux servers and all of them have energy saving settings enabled in their BIOS. Furthermore Linux shows that the CPUs are throttled if the ...
41
votes
7answers
7k views

Why do we still use power supplies on datacenter servers?

Computers mainly need three voltages to work : +12V, +5V and +3,3V, all of them are DC. Why can't we just have a few (for redundancy) big power supply providing these three voltages to the entire ...
0
votes
0answers
26 views

APC Power Controllers Inaccessible After Brief Power Loss

It seems like every time there is a brief power outage in our environment (1-2 second blip). There are generally a handful of APC power controllers that become inaccessible through network. The ...
11
votes
1answer
426 views

Daisy Chaining UPS Power Cable

I have a rackmount UPS. The UPS has a 6ft long 12AWG thick power cable that powers it from one of the server room's 20A wall plugs. The current orientation of the cabinets is not ideal. All but this ...
5
votes
1answer
109 views

Using more than 80% power on a circuit in a disaster scenario

We currently have two cabinets of equipment at our datacenter, and each cabinet is served by two 30A circuits. The facility is relatively new, and each circuit is (supposedly) redundant at the source. ...
9
votes
4answers
478 views

Maxing out both PDUs in a rack with redundant power

If I have a rack full of servers using redundant power supplies, and I'm keeping the amps at 80% (16A of 20A), isn't this still asking for trouble in the event of a power loss on one of the circuits? ...
1
vote
4answers
3k views

Power Usage via IPMI or BIOS or?

Is it possible to check the power usage of an entire machine via IPMI, BIOS, or any other option? I have done some searching but no results have came up yet. PDUs only show the total usage, so this ...
5
votes
1answer
84 views

Power Control Compartment?

I recently purchased an IBM enclosed, rolling rack that had a 6 drive server, huge battery backup, and this strange item called a "Power Control Compartment" I cannot find any good documentation ...
0
votes
3answers
3k 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 ...
0
votes
1answer
397 views

NVIDIA Tesla K20C in Dell PowerEdge R720xd — power cables

I am trying to put an NVIDIA Tesla K20C into a Dell PowerEdge R720xd. I'm having a bit of trouble understanding the power requirements of the card. First, here is a picture of two pages of the ...
1
vote
1answer
146 views

desperately need 110v from a 208v pdu [closed]

I'm in a bit of a pickle... We're moving a client's infrastructure to a colocation facility. We have redundant 208v/30amp PDUs. While installing today, we realized that the client had a small ...
2
votes
3answers
103 views

How should mains power be conditioned for devices not protected by a UPS?

UPSes protect devices from more that just power outages. I've got a Schneider SURTA2200XL UPSes (manual here). It protects against all of the following: undervoltage (aka brownouts) overvoltage ...
3
votes
2answers
227 views

UPS unable to power the 1U server

1U rack server: http://ark.intel.com/products/67786/Intel-Server-System-R1304GL4DS9 Power backup: http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1000G-IN When I try ...
7
votes
3answers
630 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
505 views

iSCSI Datastores not found after Power Failure

I have an ESXi 5 host running 3 virtual servers. 1 of these servers uses a datastore via Software iSCSI on a separate piece of hardware. When the two hardware servers (storage and host) experience ...
5
votes
2answers
123 views

UPS for 30A service to server racks

Our server rack has two 208V 30A dedicated circuits running to it, each to a PDU mounted in the rack. Most of the equipment has redundant power supplies so one goes to each PDU. I'm not sure who had ...
28
votes
9answers
14k views

UPS and power strip interactions?

Sometimes I hear that you shouldn't plug (UPS brand X / any UPS) into (power strip brand X / any power strip) because of some interaction leading to poorly conditioned power, reduced battery life, ...
2
votes
2answers
93 views

Two APC Symmetra LX 16kVA into one common output?

We have 2x APC symmetra LX 16kVA units running at the moment and have read (in Eaton's documentation) that their UPSs can have a common synchronised output (based on input phase or set phase with a ...
0
votes
3answers
2k views

Rackspace - typical power for a server

I'm trying to get some rackspace and buy an appropriate server. I've got a quote for 1/4 cabinet which includes 0.5kw of power. How do I know how much power my server will use...(e.g. I've looked on ...
0
votes
1answer
289 views

PowerEdge 2850 RAID 0 Configuration - Drive not found

I have two 73GB 15,000RPM HDD in my PE2850 that I need to stripe as one logical drive so I can install MS SBS 2011 (which requires an 80GB volume minimum). I enabled RAID in the BIOS and paired the ...
1
vote
0answers
239 views

Error in AIX : 0516-040 : Unable to read the specified physical volume

Please provide me your valuable suggestions on the error beow in AIX. When I'm running the following command on the AIX server lsvg -l rootvg I'm getting this error: 0516-040 : Unable to read the ...
0
votes
1answer
90 views

Can my cisco C220 run on 220v instead of 110v and if so, how do i change it?

We have both 220v and 110v power at our data center, but have more capacity left on the 220v circuit so i would like to put our new c220 server on it. What does it take to make this happen?
6
votes
7answers
1k views

Is there a solution against short power outages except UPS?

I encounter very short power outages quite often. Typically they last for just couple of seconds - perhaps the power grid maintenance staff just flips the switch to "Off" and then immediately to "On". ...
1
vote
1answer
90 views

power monitoring capabilities of ibm x3550 m4

I don't understand how monitoring of power consumption of x series servers is done with IBM AEM - I'm specifically interested in x3550 m4. The documentation on the servers does not really highlight ...