thollingsworth at EPLUS
Apr 2, 2009, 7:34 AM
Post #9 of 9
(2719 views)
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RE: Question regarding power controls for DS14 shelves in NetApp cabinets
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Point well taken Brad. Thanks.
The APC PDUs use a keyhole type mount on the inside of the APC rack which is probably not present in the Netapp rack leaving the option to zip tie them to the rack... ugly.
Clearly a choice if using APC racks but YMMV if using any other racks.
-Tim Hollingworth-
-ePlus Technology Inc.-
-678.462.6698-
-----Original Message-----
From: Reger, Brad [mailto:Brad.Reger [at] netapp]
Sent: Wednesday, April 01, 2009 7:53 PM
To: Sto Rage(c) ; Timothy Hollingworth
Cc: Toasters
Subject: RE: Question regarding power controls for DS14 shelves in NetApp cabinets
You might want to take a close look at the mechanical specs for the APC units and try one out in an unused (or non-critical) NetApp cabinet. APC mounts PDUs in their cabinets differently than we do so their PDU in our cabinet may not work the way you expect. For instance, they typically mount PDUs such that the power outlets face towards the center of the cabinet. NetApp PDUs mount such that the outlets face to the rear. Older NetApp cabinets have side braces that may prevent a tall single-piece PDU from fitting the way you might expect. Newer cabinets changed the bracing but the total height is less than the 70" APC PDUs.
Look at the "Documentation" tab on the APC web pages for the different PDUs and then examine your cabinets to make sure it fits the way you expect.
Brad.
-----Original Message-----
From: Sto Rage(c) [mailto:netbacker [at] gmail]
Sent: Wednesday, April 01, 2009 3:44 PM
To: Timothy Hollingworth
Cc: Toasters
Subject: Re: Question regarding power controls for DS14 shelves in NetApp cabinets
Tim,
Thanks! this really helps. Hopefully we can get this done during our
next maintenance window.
--storage
On Tue, Mar 31, 2009 at 8:06 PM, Timothy Hollingworth
<thollingsworth [at] eplus> wrote:
> Rage...
>
> For the 30 Amp cabinets using two Netapp X8712 PDUs, the APC AP7941 switched/metered PDU would be nice. See http://www.apc.com/resource/include/techspec_index.cfm?base_sku=AP7941. This uses an L6-30 input just like the Netapp PDU and has similar power specs. It should be a direct replacement. It will even give you a few C19 outlets per PDU to play with.
>
> The 20 Amp X8711 PDUs are a little trickier as you get four of them, each rated for 20 amps which effectively doubles your capacity (and number of required circuits/breakers). Netapp calls this the 20 amp cabinet but in my mind, it is really a 40 amp (or a 2x20) cabinet. The above mentioned PDU would be nice but you would have to make sure you weren't overloading them as you collapse the number of PDUs/circuits/breakers from four down to two. If you can get away with 24 amps max (30 amps derated), then the AP7941 will work. It will however, require L6-30 receptacles and 30 amp circuits which may bring an electrician into play.
>
> The AP7968 switched/metered three phase PDU would be -sweet- but again, it would require a different receptacle and a three phase breaker. This would be my choice.
>
>
> -Tim Hollingworth-
> -ePlus Technology Inc.-
> -678.462.6698-
>
> -----Original Message-----
> From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks] On Behalf Of Leeds, Daniel
> Sent: Friday, March 27, 2009 2:53 PM
> To: Fox, Adam; Sto RageC ; Toasters
> Subject: RE: Question regarding power controls for DS14 shelves in NetApp cabinets
>
> same here.
>
> remote ip access to both RLM and serial console to manage and gracefully shutdown heads cleanly
> remote ip access to PDU's to kill power to shelves after safe shutdown
>
> losing AC with lots of filers/shelves gets nasty real fast and is not enjoyable.
>
> --daniel
>
> ________________________________________
> From: owner-toasters [at] mathworks [owner-toasters [at] mathworks] On Behalf Of Fox, Adam [Adam.Fox [at] netapp]
> Sent: Friday, March 27, 2009 11:13 AM
> To: Sto RageC ; Toasters
> Subject: RE: Question regarding power controls for DS14 shelves in NetApp cabinets
>
> In our labs we use IP-addressable power strips.
>
> -- Adam Fox
> Systems Engineer
> adamfox [at] netapp
>
>
> -----Original Message-----
> From: Sto Rage(c) [mailto:netbacker [at] gmail]
> Sent: Friday, March 27, 2009 1:58 PM
> To: Toasters
> Subject: Question regarding power controls for DS14 shelves in NetApp
> cabinets
>
> We recently had a brown out in one of our smaller data center, and
> when the power came back, the AC units did not kick in on time. The
> filers came online and promptly heated up, causing over temperature
> alarms to go off. These NetApp units are in standard NetApp cabinets
> so the only way (that we know of) to shutdown was to be physically
> on-site to turnoff the breakers to these cabinets. The question to all
> toasters is how do you remotely turn off the shelves when you have a
> situation like this? Most of the heat is generated by the shelves, and
> we couldn't find a way to shutdown the shelves remotely. Shutting down
> the heads don't help as the disks are still spinning and generating
> heat. Do you have remote controlled power outlets for these L6-20
> /L6-30 power connectors that these shelves use? Can you recommend some
> solutions?
> thanks in advance
> -Sto Rage
>
>
>
>
>
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