Author Topic: Environment monitoring for servers  (Read 1006 times)

georgej

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Environment monitoring for servers
« on: March 16, 2010, 07:53:46 AM »
It seems to me that with a small redesign the ioBridge could become the basis for an environmental monitor and system control unit for servers/workstations.  It has four digital and four analog IO's, enough to monitor four temperature probes and to monitor the reset and power on/off buttons.

Throw in PoE (power over ethernet) and a redesigned board (to fit into a standard interface slot but without any physical interface to the motherboar) and there you have a cheap monitoring device for a server.

With the new rules you can generate temperature alerts and reset or power on/off a server.

As a refinement I'd have two of the analog temperature probes routed to the backplane as well so that temperatures within, say, a cabinet can be monitored.

The reset and power buttons are just contact switches so two of the digital IO's can monitor the two switches and the other two can "pass through" the state of the switch to the motherboard.

What is crucial here is, I feel, PoE; and this should be an option for all modules.
« Last Edit: July 13, 2010, 05:09:31 AM by georgej »

nick

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Re: Environment monitoring for servers
« Reply #1 on: March 16, 2010, 11:42:01 AM »
POE makes no sense on a device going into a server  -- why not just pick up the  power from the server?

georgej

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Re: Environment monitoring for servers
« Reply #2 on: March 16, 2010, 04:30:21 PM »
Where are you going to pick up the power when the server is switched off, other than off the motherboard (which I would have thought is a bad idea)?

nick

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Re: Environment monitoring for servers
« Reply #3 on: March 16, 2010, 06:27:41 PM »
What do you need to monitor when the power is off?

iobridge

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Re: Environment monitoring for servers
« Reply #4 on: March 17, 2010, 08:19:50 AM »
PoE is a good idea for your application idea. I can see why having two independent power sources makes sense, so the server monitor can function even if the server is off.

We are thinking about PoE, but have not mocked it up just yet.

I tested a few of these connectors and they work great (as long as you can find a 5v 2.1mm power supply):

http://item.ebay.com/150417158527

(our standard supply is 2.5mm)
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georgej

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Re: Environment monitoring for servers
« Reply #5 on: March 17, 2010, 10:39:12 AM »
To respond to Nick:  to turn the server back on again! 

I appreciate that proper lights out management interfaces are the way to go, but they cost a whole lot more than an ioBridge.

I think that PoE is an absolute must have for the next generation of ioBridge - most implementations will have a network interface and a PoE 4 port hub/switch isn't expensive.  The convenience of having one cable to the ioBridge without mains power supply opens up the implementation possibilities.  With main voltage you've got to be far more careful than with a standard CAT5/6 cable run.

The current ioBridge housing is fun to look at but it says "hobbyist" (far enough, that's what it aims at) but I think a more secure/enclosed solution would allow for location in a harsher environment.

nick

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Re: Environment monitoring for servers
« Reply #6 on: March 18, 2010, 12:06:58 AM »

We are thinking about PoE, but have not mocked it up just yet.

I tested a few of these connectors and they work great (as long as you can find a 5v 2.1mm power supply):

http://item.ebay.com/150417158527


Note that true PoE is an IEEE standard to send 48V over the Cat5.  See http://en.wikipedia.org/wiki/Power_over_Ethernet

iobridge

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Re: Environment monitoring for servers
« Reply #7 on: March 18, 2010, 01:06:37 AM »
Yes, PoE aka 802.3af is different then putting power over an ethernet cable. However, those adapters allow you to put power from ac power adapters on one end and break out the dc barrel connector on the other end. I have been running one for my home router for years. They are nice.
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