Two separate NAS as RAID1 -redundant storage

Two separate NAS as RAID1. We’re interested in redundant storage – but external redundancy rather than internal. Instead of dual controllers, we’d like two singlecontroller boxes operating together. We’re looking for two SAN devices which we could combine into a RAID1 such that if either device failed, our data would still be readable in the other SAN. They’d need to provide iSCSI over 10GbE.
Does such a beast exist? Or is most commodity hardware designed with all the bells & whistles of a NAS?

Yes, there is such a beast. Last week we have been doing hands-on tests with Synology high availability solutions. This means – there are two identical NAS systems – let’s say RS2818RP+ (rackmount) or DS1618+ (desktop). 

The two servers communicate via a Heartbeat connection. When the active server becomes unavailable, the passive server automatically kicks in an takes over.

Our test involved two desktop NASes. We started upload tasks, then disconnected one NAS and other one automatically took over in around 30 seconds. It continued uploading files with no problems. In the office environment – people probably would not notice what just happened.

So, yes, you can have RAID1 dual NAS solution and it will work. Synology will support dual 10GbE or even 40GbE card upgrade with ISCI connectivity. So you can have NAS and SAN solution. You can choose, one, another or both.

Applied models

19 series: RS1219+
18 series: FS1018, RS3618xs, RS2818RP+, RS2418+, RS2418RP+, RS818+, RS818RP+, DS3018xs, DS1618+, DS918+, DS718+
17 series: FS3017, FS2017, RS18017xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, DS3617xs, DS1817+, DS1817, DS1517+, DS1517

Find regulary updated NAS offers here
Of course I would prefer you choose AMAZON UK AMAZON USA to buy your perfect solution, however, if you would rather buy locally, please use the links used above to take you to your local Amazon store and help support this free advice service with ad revenue. More ways of supporting the blog are described HERE  

Home: Business: Comparison with other service providers:  

If you like this service, please consider supporting us.
We use affiliate links on the blog allowing NAScompares information and advice service to be free of charge to you. Anything you purchase on the day you click on our links will generate a small commission which is used to run the website. Here is a link for Amazon and B&H. You can also get me a ☕ Ko-fi or old school Paypal. Thanks! To find out more about how to support this advice service check HERE   If you need to fix or configure a NAS, check Fiver   Have you thought about helping others with your knowledge? Find Instructions Here  


Or support us by using our affiliate links on Amazon UK and Amazon US

locked content ko-fi subscribe

DISCUSS with others your opinion about this subject.
ASK questions to NAS community
SHARE more details what you have found on this subject
CONTRIBUTE with your own article or review. Click HERE
IMPROVE this niche ecosystem, let us know what to change/fix on this site
EARN KO-FI Share your knowledge with others and get paid for it! Click HERE