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NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

  • Dual core Intel i3-2120 3.3GHz processor and 4GB ECC on-board memory
  • 6-bays for 24TB maximum capacity (expandable to 44TB w/ optional EDA500 chassis)

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Netgear Inc. ReadyNAS 516 (RN51600-100NAS)

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the Netgear Inc. ReadyNAS 516 (RN51600-100NAS)

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  • James D.
  • 4/17/2015 8:55:26 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week

1 out of 5 eggsNot willing to support their customers - DO NOT BUY

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: High capacity, 6 drives, dual GB network

Cons: Poor user interface and support, very pricy

Other Thoughts: The box looks good and seems to work, but lacks a good user interface. The user interface requires far too many clicks and hides important information. The device is not easy to configure for anything other than their own RAID technology, and when you do it doesn't provide important details. They claim to support hot-spares, but do not inform you that a hot spare is available and will be used. Since this is a RAID box and confidence in your redundancy is important, this is important that they indicate exactly what is going on and what the current status is. I contacted their support and their customer service was great, but ulitmately netgear refused to own up to the issue and refused to do anything to address my concerns. If they are not willing to provide details that give you confidence their product is working and doing what it is supposed to, this is basically a large, very expensive door stop. I WILL NEVER BUY NETGEAR AGAIN...

Manufacturer Response:

Hey Swindled,

We want nothing more than to make things right and want to investigate your case. Please email us at with the case numbers support gave you-- if you no longer have them, then just include the serial number of your RN51600.

Please also feel free to use the Readynas forums we have experts actively monitoring and responding to questions.



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  • Jason W.
  • 1/28/2015 5:54:17 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

1 out of 5 eggsHorrible Customer Service/Horrible Always changing User Interface

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: Stores Data

Cons: Netgear keeps putting out beta versions of their firmware/user interface that causes a previously working unit to not function.

Manufacturer Response:

Hi Anonymous,

We'd like to work with you directly on the problems you are having. Can you tell us about the specific problems you are seeing with your ReadyNAS unit? Which firmware version is it currently running? You can reach us at -- we'll get in touch with you directly. Please feel free to provide a phone number if you prefer to be contacted via phone.



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  • GREGG F.
  • 9/5/2014 9:06:27 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

3 out of 5 eggsUpdate to 5/12/2014 1:44:45 PM Review

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: * Construction quality (it's still running well enough)

Cons: * Fails (at least for me) when you use features stated in my last review.

Other Thoughts: Please read my review from 5/12/2014 for reference

Ok, so it's been almost 4 months since my last review. Over the course of 2 months, I worked with Netgear American Technical Support to find the following 2 things out:
* When used with large LUN's as an iSCSI target, the backup feature will cause the 516 to crash.
* Spanning a RAID across to the EDA500 Desktop Expansion Chasis will cause the 516 to eventually crash and immediatly slow the interface a crawl, meaning that a button press on the front panel response time could be up to 60 seconds before it registered "if" it registered at all.

My thoughts/suggestions:
* The 516 on it's own as a iSCSI target with a single LUN on it has been working well overall.
* The web interface is still a little bit buggy in both Google Chrome and Internet Explorer. Cool down the whiz bang tools and just make it work quickly.
* Seeing iops in the web interface is great, but seeing life data transfer rates in MBPS would be even better.
* At least segregate things that won't work together and DON'T advertise features that just don't work at all.

Final Analysis:
Will I use Netgear again, yes for SOHO projects, no for mid size to larger projects. Build quality for the 516 was better than any other small Netgear product I have ever used, but they just don't have a good enough handle on their own product capabilites for me to trust them on larger projects. But honestly, this build quality is DEFINITELY in the right direction. Maybe I'll give them a larger project chance in 2-4 years if they keep up the build quality and improve their product understanding, marketing, and tier 1 technical support. Hope you found this (and my last) review helpful and you have a wonderful day.

2 out of 2 people found this review helpful. Did you? Yes No

  • GREGG F.
  • 5/12/2014 1:44:45 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

3 out of 5 eggsOk, but not ready for prime time.

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: * Cost
* Solid construction

Cons: * Buggy/laggy front interface (maybe just mine?)
* Issues with expandability
* Slow responding technical support

Other Thoughts: About 7 weeks ago I purchased the 516 and the expansion module. Connected them up, filled them with Enterprise Class drives, created an iSCSI target in a hardware and VLAN controlled environment and then let it run while testing it with low level usage for about a month. The first crash came about 2 weeks after putting it into production. It froze as an iSCSI device in VMWare and the web interface to the unit crashed the first time, allowing me to use the power button on the unit to shut it down properly and then unplug everything, check connections, plug back in, boot back up, and reconnect to VMWare. A few days later, another freeze, but along with losing its VMWare heartbeat and web interface to either of the separate IP Addresses for it's 2 NIC's, there was no response from the units control panel at all, so I had to hard power the whole thing down this time. Leading to a 36 hour rebuild (not unheard of, but unexpected). And then another crash a few days after that which was possible (thankfully) to do a proper shutdown with the power button on the 516.

So last Thursday, I started a tech support session with NETGEAR. It took them Thursday, Friday, Saturday, Sunday, and part of today (Monday) to look over the log files. Only to ask a few more questions and give me some hopefully helpful news about turning off snapshotting and that my eSATA cable to the expansion unit "may be bad" and to try another one. The cable was the one that came with the expansion unit.

I was disappointed as I had hoped that after my fairly thorough initial explanation complete with issues I've had since day one, along with log files, would have prompted a bit more than several days to look over a case that is for a production box. For anyone interested, the case number in question is (#23180016).

I've got a Sans Digital AccuRAID which is faster and literally a few dollars more than this NETGEAR 516 setup (including the expansion bay). It has been performing flawlessly for over 6 months. I'm sincerely hoping that NETGEAR will read this and realize the issues they have both with hardware and with customer service response and adjust their policies accordingly. Until then, I can't really recommend this for anything other than home use.

Manufacturer Response:

Hi Anonymous,

We want to follow up on your support case and do everything we can to help you get the most from ReadyNAS. Please email us directly at with a copy of this review and your case number, and we'll be in touch.



2 out of 2 people found this review helpful. Did you? Yes No

  • Michael M.
  • 1/21/2014 2:05:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

5 out of 5 eggsLove it!

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: This 6-bay ReadyNAS storage device has been a great addition to my home network. Between files for work, family photos and videos and my large media collection I was tired of keeping track of what files were on which USB drive.

A friend that works for NETGEAR offered to let me try a ReadyNAS device and having used it for a month I can honestly say this has become a "must have" for my home.

Set-up using ReadyCLOUD through my web browser could not have been easier. I was worried that it would be a long process and require me to collect a lot of information about my network, my router, etc. However, with a single-click ReadyCLOUD found the new device on my network and it was only a few clicks after that that everything was up and running.

Although my first exposure to ReadyCLOUD was for set-up, I have been impressed by how many other things I can do through the ReadyCLOUD portal. I have toyed with cloud services like Dropbox in the past, but I am always running out of space or not feeling great about paying higher monthly fees. With ReadyNAS, I can still access my data from anywhere (through the web, directly from my laptop, even from my iPhone) just like cloud storage, but I never run out of space or have to pay any kind of ongoing fee. And frankly, I feel much better knowing my stuff is securely and privately stored on disks that I own and that sit in my house. Also, when I say secure I mean two things. Everything is protected from the privacy dangers of a cloud storage service, but equally important to me is the security I feel knowing that my data is protected from loss or corruption. At the very least, getting all the important stuff from my laptop, tablet and phone backup up is great. Even better is knowing that should a disk fail, RAID will keep data safe.

Finally, ReadyNAS has an additional layer of protection that means I am able to recover not only lost files, but also any previous version of any file that I lose. I did a little research when I first heard about ReadyNAS and this ability to restore not just from the last backup, but from any version seems to be unique to the NETGEAR line. Finally, in addition to using the ReadyNAS to backup data we also use it as our home media server. Using both DLNA and Plex (which operates right on the box) my whole DVD collection is now in one place and I can watch from any of my TV's, tablets or iPhone. Even better, if different people want to watch different things, the ReadyNAS will send out multiple streams without any noticeable lag.

Cons: None

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  • Anonymous
  • 12/1/2013 8:17:11 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month

4 out of 5 eggsI like this unit!

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: I wanted lots more storage for personal files, such as documents, photos, and movies. I currently have 12 TB of storage in my ReadyNAS 516 and have two slots available if we need more space.

Overall ease of use is very good. Accessing the storage remotely from my home computer was very easy, and it didn’t take long to figure out the user interface for logging in and file management.

I’m not an engineer, but I know my way around computers. The ReadyNAS 516 offers everything that I want and expect from external storage.

Cons: On a scale of 1 to 10, I would have to rate the ease of installation a 7 because it wasn’t clear where to locate some of the buttons and lights that are referenced in the Installation Guide.

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  • Jason W.
  • 11/1/2013 4:49:45 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat So Far

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: Easy setup and installation of HDDs. Plenty of space and quick CPU

Cons: GUI for advanced setup of the accounts and folders could be easier. Not many APPs that you can download for Netgear NASs

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  • Bart C.
  • 10/18/2013 7:34:26 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAddendum

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: One point I failed to mention in my other review: The Tool-less hard drive tray.

This tray is real step forward in ease of use. No screws or tools needed to place a drive in, or remove a drive from the tray. An additional and very cool feature is the ability of this tray to also mount 2.5 in HDDs or 2.5 inch SSDs. (2.5 in drives, do need mounting screws.)

Cons: There is a release button that allows the tray to be pulled from the NAS frame. That is the same button that releases the drive from the tray. So if you hold down the release button while pulling the tray out, the drive will separate from the tray. Best to press the release button just long enough for the handle to pop out. Then grab it to remove the tray.

Other Thoughts: Better yet, I just put one mounting screw in each tray just to be sure.

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  • Bart C.
  • 10/18/2013 6:56:03 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsEvolved for the better

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: I’ve now had several months living with the Netgear 516. And, while my original review of June 1, 2013 (Work in progress . . . at best) was my assessment at the time, I have come around to a more tempered and positive view.

The principle impetus for my new view is the evolution of the OS. (At this writing v6.1.3)

The OS now communicates better with disk status info. Quirks, and dead ends in the UI have been ironed out. And, the connection to the Netgear ReadyCLOUD has been made easier.

All of the original strong points called out in my orig review still stand. Add to that the incredible ability to take “snapshots” of one’s data. I did not fully understand this feature first time around, but this feature alone makes this box a standout. One has the ability to ‘freeze’ or snapshot a data folder on any, user determined, time interval, automatically. This essentially is an automated backup of ongoing data shares. (NB: This is not a real backup, in the sense of a secure copy of data different from the main storage system.) These snapshots give you a time machine to go back to any previous version of one’s data. This is true for folders or individual files. Additionally, one can also schedule actual backups to a separate device, for true backup. This makes the 516 (and others in the family with OS6) a very valuable player in the home office or small business. I have six 3TB drives in mine, and have come to rely on my 516 for data and multimedia storage.

One point that is much better is first start up with new (to the box) disks. The really BIG key is to use disks that have no data on them. If the box senses data on the disks, the mounting of the RAID may fail. The idea is to protect one’s data from inadvertently being wiped. But I consider this false caution. If one is putting disks in a box to mount a new RAID... well you get the idea.

In my original review I raised the question of Netgear’s commitment to the potential of the 516. I see commitment in the evolution of the OS, not so much with hardware. No official memory upgrade (there is an empty slot that could get populated), and no 10 gig add on NIC.

Cons: Of course the hardware issues I wrote about in the orig review remain, I have reluctantly grown accustomed to them (dim display, no power light, etc.) I hope there will be a version two of this box, that incorporates lessons learned.

Having said all the good stuff about snapshots, the bad part is the documentation. It is very thin, and takes a lot of experimentation to get it all set up. There are so-called white papers on the Netgear site, but they really should be called executive summaries, rather than “white papers.” A better approach is to use the product support page and access the KB files. If you read several different KB articles, you can come to a good understanding of the better features of the OS. But, why such a scattered approach?

The UI while much improved from the first version, still has some hidden click points that one has to stumble on, to get hands on all the features.

The app store is thin but growing slowly.

There is no single sign on (SSO). The ReadyCLOUD is one set of credentials, and the app store is yet another.

And, lastly, the RAIDar utility has still not been upgraded to full integration to OS6. Time for a rewrite on this util.

Other Thoughts: I think, in spite of some weak points, the box now earns 5 stars.

1 out of 1 people found this review helpful. Did you? Yes No

  • David S.
  • 10/16/2013 11:46:23 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month

5 out of 5 eggsGreat NAS for larger volume home user (or biz)

This review is from: NETGEAR ReadyNAS 516 (RN51600-100NAS) Diskless System Network Storage

Pros: + Tool-less disk install
+ Solid – a hefty little box
+ Speedy performance
+ FlexRaid management of disk expansion
+ Easy discovery and set-up
+ Remote cloud access to NAS (files and some admin)
+ Synced files across multiple PCs and NAS (ReadyDrop)
+ Clean and flat UI for admin access

Cons: - Documentation could be more clear. Most of my complaints might be “How do I do X?” until I figured it out.

- Account/User based ReadyDrop? It would be nice to have separate synced folders for my wife and I; I can imagine small businesses wanting something similar.

- More set-up wizards to walk folks through the basic stuff (or skip steps they don’t need) - the entire experience doesn't match the ease of initial discover, setup, and Readycloud/Remote setup

- Please adopt the right click, left click convention for the admin UI. Left button to select, drag, double click to open, etc. Right click for other choices. Currently, it is all left click once for menu options (open, copy, etc.), then select.

Other Thoughts: The ReadyNAS 516 has been fairly painless to set up and has performed well without problems to date. I’m using the NAS as the primary repository for home media and backup for the home laptops. With the media volume growing at an increasing rate, I wanted a NAS that expanded easily, had plenty of bays – enough for RAID6. A secondary need was to manage personal projects that I often need to access and work on from work and home PCs.


My initial set-up was with two 3TB Seagate NAS HDD drives. The 516 supports tool-less installation, so it took just a minute to install the drives. Under FlexRaid, Netgear’s term for their flexible storage expansion, I should be able to add drives and seamlessly switch to RAID5 from the initial mirrored array, but I haven’t had need to test that yet.

ReadyNAS has a plug-and-discover method which works well. I connected the NAS to the router, turned it on, and went to the ReadyCloud web interface to discover the local drive. Despite my double NAT set-up, it worked quickly and led me through the set up of the initial admin user ID and password. Although not required, I assigned it a static local address to simplify later administration.

I set up users with different permissioning so I could segregate some shares used to back up more sensitive information (financial, medical) so I could give guests access to media if they needed it (movies, pictures, music) without exposing more sensitive stuff.

Finally, I downloaded ReadyRemote onto the PCs that I would be using most frequently to access the NAS, and made sure Readyremote and ReadyDrop were enabled. I can access my NAS from anywhere in the world as if I were on my home LAN (almost), which is nice. I specifically use the ReadyDrop to sync personal files from work to my NAS and to my home PC.

I’ll note that ReadyNAS has a fairly flat and clean UI for the admin interfaces, which I like. It is intuitive and doesn’t bury interfaces under layers of nested menus. I can’t be quite as favorable about the documentation. The user/software manual was a little confusing in places, and UI snapshots were either out of date or incorrect for my model (the manual covers a range of models). The 516 is my third NAS, so I figured things out, but it might be a little more difficult for the first time NAS user (yeah, I know, this isn’t an entry level NAS).

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