UPS for ReadyNAS 6 + ReadyNAS Duo

mdgm wrote:
If your router dishes out the IP addresses you'll want that on the UPS as well.

Its not so important...because DHCP-Server isnt needed, untill current DHCP lease expires... ;)
Also if devices are in the same subnet and connected with switch, routing doesnt occure (packets doesnt travel trough router) so basically you could disconnect router from network, nothing happens.

What if the lease expires with the router off before the NAS is given the shutdown signal? Then the NAS wouldn't shutdown safely.

mdgm wrote:
What if the lease expires with the router off before the NAS is given the shutdown signal? Then the NAS wouldn't shutdown safely.

If command is already given, it will shutdown..
If lease expires before command and DHCP-Server is offline, then ofcourse it doesnt.

Chances are pretty slim as DHCP-discover-offer takes milliseconds to devices obtain a new lease.

As I said, its not so importand, but its better to have Router also with UPS.
(As you wont get e-mail also, that power failed without it)

Other option would be to use static DHCP assignement (By MAC address), then DHCP-Server is needed only when "client" Devices will boot or are disconnected/re-connected to network .. ;)
Lease which would be given is "infinite" then...

Ah, but good point about sending the email. My internet devices are also in the other room next to the router. Ok maybe I need another small UPS just to protect those routers and modems, to make sure I have everything covered. I presume even a heavy duty router (I have a FVS336G) and a couple of modems and a wireless router can't add up to more than 100W, right?

I would look definately look wattage then, to make sure NAS UPS drains first and "safe" shutdown is always performed.

I have a pro-6 located with my network core (2 routers - FIOS Actiontec and a high-end Netgear R6300, and a 24 port GS724 switch). All are on the UPS, which says the current draw is 89 watts. I can't tell the split, but I am sure that most of this is from the NAS.

In a different part of the house I have an NV+ and a Duo (both v1). The current draw is 56 watts.

All three NAS are fully loaded with disks.

Note you can set the power-down thresholds (at least you can on the V1 and x86 products). That can help ensure that the router stays up longer than the ReadyNAS.

i have an APC BR1500G UPS that protects just a recently acquired Pro 6 and a 2 1/2 year old NVX. The Pro 6 has basically the same PSU as your Pioneer, but your Pioneer will draw more because of the drives (I have 2x3TB Hitachi Green and 2x1TB WD Red Label drives). The NVX should have a slightly higher power load than your Duo because of it's drives (2x3TB Hitachi Green and 2x1TB Seagate 7200RPM drives). The total load according to the front panel display is 116W or 13% of the capacity and has an estimated run time of 48 minutes. So, I would estimate that a 700W unit would provide less than 24min run time even without the laptop. The 1350W unit would provide about 40 minutes. But, again, the purpose of the connection is the orderly shut down of the NAS units. I have my UPS connected to the NVX (backup unit) and the Pro 6 monitors it over the network.

I have two older 1250 watt UPS units (one on the entertainment system to avoid resets) and one that powers the PC, monitor, router and switch. I was going with a BR1350G until I got the detailed specs of the BR1350G and BR1500G off the APC website and discovered that I can get a 1500 watt battery pack (BR24BPG) that plugs into the back of the BR1500G and is controlled by it and extends the run time. The battery pack will not connect to the BR1350G, nor will it connect to the BackUps XS BX1500G. In the US on Amazon the BX1500G is $3 less expensive than the BR1500G and except for the external battery pack plug has virtually the same specs. I wanted the possibility of future expansion.

Update: this post has typos in the use of Watts and VA. In the paragraph above 1250 watt UPS s/b 1250 VA UPS. In the first paragraph 700W should be 750VA and 1350W should be 1350VA. I have left the typos in place because a following post refers to this one and corrects most of the errors.

Thanks for all this info PapaBear, very useful stuff. Your dedication to protecting your system makes me feel a bit crazy for having let this slide for so long!

Finally some real numbers to work with. Sounds like the numbers for your pair of NAS devices are not too far off what I should expect for mine.

The total load according to the front panel display is 116W or 13% of the capacity and has an estimated run time of 48 minutes.

Ok, so far I'm with you - this is with your BR1500G which I believe is 865W right?

So, I would estimate that a 700W unit would provide less than 24min run time even without the laptop.

Whoa, you lost me now. So a 19% reduction in your wattage results in a 50% reduction in run time? I guess this means it's not a simple linear function here?

The 1350W unit would provide about 40 minutes.

I'm lost again. Did you actually mean to say 1350W here or are you referring to the model number? I can't seem to find a BR1350G anywhere - but I can find a BR1300G at 780W - is that what you are referring to?

Ok, so I can't really see how your math works here. I've plotted the 3 estimates you provided, assuming we have:
116W / 865W = 13.4% => 48 mins
116W / 780W = 14.9% => 40 mins
116W / 700W = 16.6% => 24 mins

This seems to be a downward sloping curve (rather than linear), and if I'm right, that puts the estimate for a 540W UPS (such as BR900GI - £156) down to below 5 mins, which I guess isn't going to work. If this was simple linear math, I would calculate that 540W should still give us enough for about 30 minutes (i.e. 62% of your 865W).

The other options I can see on Amazon UK are BR1200GI (720W) for £230 and BR1500GI (865W) for £270. So I guess I could pay the extra £40 for future expansion capability plus get the extra 145W which can cover an extra switch/laptop/etc. But this is quite a bit beyond what I was thinking to spend. Is the math here all correct?

I was really hoping to spend £73 on a simple BE700G-UK (405W), but now with these numbers, it sounds like that isn't even going to come close to what I need.

I'm tempted to go ahead and get that cheaper one anyway, give it a try, and if it definitely doesn't work for the NAS, then move it into the other room and use it to protect the routers and other stuff.

The run time is not linear with increasing load. Typically 1/2 load provides 3x longer run time than full load.

My post has a repetitive typo error. The 1500VA unit is indeed 865 Watts and where I stated 1350W it should have been 1350VA which would have the power of 780 Watts and where I have 700W it should be 700VA which would have the power of approximately 420 Watts. These units have a power factor (Watts/VA) of approximately 60% and ideal perfection would be 100%. (In DC Watts = VA or 100%, but it is the VA that matches watts not the other way around).

So my 865 Watts UPS (1500VA) with a load of 116 Watts (13.4%) yields a run time of 48 minutes.
That same load on a 780 Watts UPS (1350VA) would be as you have calculated 14.9% and approximately 40 minutes or less.
However, your line for 700W should actually be 420 Watts (700VA, the original spec you posted) calculates to 27.6% of the load and about 24 minutes or less run time.

I checked my 1250VA (750 Watts) APC UPS which powers my PC, Monitor and fluorescent desk lamp and as I discovered during a power outage, a laser printer and inkjet printer as well. The load indicated was 184 watts or a load 24.5% of capacity and it gave me a run time of 22 minutes. Turning off the two printers (which had been in stand-by) dropped the load to 166 watts and flipped the numbers with the load at 22.1% of capacity and the run time now at 25 minutes.

StephenB is most likely correct in that the higher the load the faster the run time drops as it would not be linear. That is why I usually opt for bigger units to get the load percentage down. One of the reasons I added a third UPS was to increase the run time for my units, the other was to move the NAS units into another room. When I had the NAS units along with the PC, monitor, etc, all on the 1250VA unit, when I had a power outage and was sitting her I looked at the panel on the UPS and it was indicating a run time of 10 minutes and started counting down rather quickly. I manually shut everything down. Adding the 116 Watts to the 184 Watts gives me about a 300 Watt load or 40% of the 750 Watts power of the UPS and a run time of 10 minutes.

I would recommend you try to keep your power load at 20% or less. For approximately 120 Watts that would indicate a UPS of 600 Watts or approximately 1000VA or better.