Signal 2 NAS's from an APC Back-UPS CS 350 UPS

[aberkeley_apc]

This was originally posted on APC forums on 9/21/2011

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Hi,
I have just added a new QNAP NAS to my system in parallel to an existing QNAP NAS, there is only one USB signalling port on the UPS, but i want to be able to shut down both boxes. Is there a dual usb cable available or should i make one? Any suggestions on how to do this without having to purchase another UPS would be greatly appreaciated - 2 UPS for 2 NAS seems a little overkill for home use!

cheers

anthony

[BillP]

This reply was originally posted by Angela on APC forums on 9/21/2011

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hi anthony,

i am not aware of a way to get this to work on any Back UPS. For a Smart UPS, you might have a different option with a network management card but the Back UPS are designed to work with one direct connection. i am not sure if there is a way to get around that but i haven't heard of one in my time working with these products.

[henkgg_apc · Accepted solution]

This was originally posted on APC forums on 9/22/2011

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I do not own a QNAP, nor your type of APC UPS (Synology DS210j + APC BE700G).
From what I have read, both Synology and QNAP do support this, standard functionality. The USB connected NAS acts as a master, the other NAS as a slave. The IP address of the NAS slave must be known by the master NAS. If the master NAS is about to shut down, it signals -over LAN- to the slave. Of course the power of your router must be supplied by the UPS also then.
I do not use this setup, and can't test it: I own just one NAS.

What I did test, and it worked: The NAS, USB connected to the UPS as master, my laptop as slave (only connected by WLAN). This required installing a NUT client on the laptop. I found this info helpful: http://www.gadgetvictims.com/2010/02/battery-backup-solution-for-home.html
So, if this works, why wouldn't a two NAS setup of the same brand work? Your slave NAS doesn't need a kind of NUT client, its built in.

I hope this helps. Check out the QNAP manual, and the QNAP forum!