Recommend a UPS (NAS power back up)

Posted by: Mike-B on 05 August 2014

Can we get some recommended UPS makes/models for NAS power back up

Looking around it appears to range from simple limited time power backup, auto shut down, surge protection, sizes that are reasonably small to a suitcase size & prices from £50 to mad money.  

 

I'm looking for a simple & relatively small power only unit,  not really interested in surge protection,  but wouldn't say no,  ditto auto NAS shutdown.  Cost is not that important but needs to be justified if its in 100's.  

Posted on: 05 August 2014 by Simon-in-Suffolk

Hi Mike, I use an APC CS350 for my main NAS, my back up NAS, my connecting switch, and Raspberry Pi. One NAS communicates directly by USB to the UPS and the other by the network slaved by the prime NAS to do a controlled shutdown if the UPS becomes exhausted.

Has worked well for some time now, and living where I do I get fairly frequent power interruptions.

The UPS was about £70 from memory and provides just under  60 minutes of offline power.

Simon

Posted on: 05 August 2014 by james n

+1 on the CS350. Works very well for me. Allows a controlled shutdown of the NAS and runs my NAS and Mac Mini server 

Posted on: 05 August 2014 by simes_pep

I have APC Smart-UPS 750 connected to 2 ReadyNAS units, an old NSLU2 (so 7 disks in total), cable modem, switch etc. Provides 20 minutes of battery backup, but more importantly provides a controlled shutdown of the ReadyNAS units during a power outage, through USB/Network monitoring.

 

I have got great service from an eBay seller (http://www.ebay.co.uk/usr/ups-...rksid=p2047675.l2559) UPS-Trader (www.ups-trader.co.uk), who is able to provide refurbished units and replacement batteries. I can certainly recommend them.

 

Simon.

Posted on: 05 August 2014 by Bart
Originally Posted by james n:

+1 on the CS350. Works very well for me. Allows a controlled shutdown of the NAS and runs my NAS and Mac Mini server 

How does the controlled shutdown work?  Ive always wondered.

 

The CS350 is about $99 here.  Is it silent when ac power is coming into the home normally?

Posted on: 05 August 2014 by Simon-in-Suffolk

The controlled shutdown works by the UPS signalling to the NAS to do a shutdown (via USB or Ethernet for example) when the UPS batteries near exhaustion. 

Simon

Posted on: 06 August 2014 by intothevoid

+1 for APC. I've been using a Smart-UPS SUA750RM2U for the last four years or so and wouldn't be without it. We don't get too many power interruptions, but when we do it's a lifesaver. It gives about two hours on battery, which is plenty.

 

I have the NAS, switch, router and cable modem running off it.

Posted on: 08 August 2014 by Mike-B

OK folks,  thanks for the advice.

An APC CS350 is winging its way together with 3x IEC male 90' angle plugs

I've dug deep into the measuring how & where to fit it,  & it looks like another hole in the back of the NAS cabinet will do the trick = good result with added WAF to get it hidden.

Posted on: 08 August 2014 by james n

Good call Mike 

Posted on: 08 August 2014 by Bart

Is there any way to control the shutdown of Naim servers in this way?  Or would the strategy of a UPS with a UnitiServe just be to keep the uServe running 'til power comes back?

Posted on: 08 August 2014 by Mike-B

No not pure sine waves,  the output is a stepped AC square wave but rounded off with C&L it is a sine wave approximation close enough to satisfy the APC's SMPS to produce uninterrupted 12vDC.  

The transition to battery powered AC is 3 to 5ms & appears similar to a typical minor power supply glitch.

The transition periods for both AC fail & restart is shown below as is the softened stepped wave form.  

 

 

 

Posted on: 08 August 2014 by Mike-B

whoops  ........ a sine wave approximation close enough to satisfy the APC's an SMPS enough to produce uninterrupted 12vDC. 

Posted on: 12 August 2014 by Mike-B
Originally Posted by Mike-B:

OK folks,  thanks for the advice.

An APC CS350 is winging its way together with 3x IEC male 90' angle plugs

I've dug deep into the measuring how & where to fit it,  & it looks like another hole in the back of the NAS cabinet will do the trick = good result with added WAF to get it hidden.

The UPS arrived yesterday as did some very useful 90 degree angled male & female IEC plugs I ordered extra - they can be set at 4 up,down & sideways angles, very handy for the small cabinet the UPS is located in.  

Anyhow, too busy yesterday with grandkids staying over the weekend, so this afternoon it was installed. Opened up the existing cabinet hole to pass IEC plugs, then lots of making cables tidy work (I'm OCD on that)  Installed the software & set parameters, plugged it into Synology DS & set that to work with UPS. 

Thats it,  all tested & working fine.