NETGEAR RNDU4220 ReadyNAS Ultra 4 (4TB: 2 X 2TB) Network Storage - RNDU4220-100NAS

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Product Overview

The NETGEAR ReadyNAS Ultra 4 TB (2 x 2 TB) offers an ideal network storage solution for multimedia enthusiasts. Simple to set up and operate, this network attached storage device allows multiple users to access shared music, movies, and more--from one centralized network location. Media shifting capability, easy Internet access to files, X-RAID2 technology, and bay space for four drives all add capacity, security, and flexibility to your media setup.

Access All Your Media in One Place

NETGEAR’s ReadyNAS Ultra 4 lets you store all your music, photos, videos, and data in one centralized location that everyone on your home network can access. Instead of each computer in your home having separate media libraries, each computer--whether it's a PC or Mac--can access, share, and stream multimedia content directly from the ReadyNAS Ultra 4.

Thanks to its 80-Mbps capacity, the ReadyNAS Ultra 4 will leave you confident that the music and videos you stream will be smooth and clear, even when multiple users are accessing them simultaneously. And ReadyNAS Ultra 4 does more than simply connect to computers on your network, it can connect to any devices that are DLNA certified, including Sony PlayStation3 and Microsoft XBox360. Even digital picture frames can access the media you put on your ReadyNAS Ultra 4.

For wired networks and devices, the ReadyNAS Ultra 4 has two fast Gigabit Ethernet ports.

Drag-and-Drop File Access via the Internet

The NETGEAR ReadyNAS Ultra 4 not only lets everyone on your home network access your media, but it also lets you share and access files over the Internet using ReadyNAS Remote. Featuring simple setup, drag-and-drop file management, preservation of all your network's privacy settings, and secure transfer over an encrypted tunnel, ReadyNAS Remote makes it easy to share music with friends, stream movies from your home to any Internet-connected device, and access files on your Droid or iPhone.

Optimal Streaming and TiVo Compatibility

Netgear's partnership with Skifta makes it easy to shift media files and access your media on DLNA-certified devices from virtually anywhere. This means you can listen to music stored at home when you're at work and access your movie collection from a hotel room. And when you want to access media using mobile devices, you can use embedded Orb software to convert files for optimal streaming and sharing.

In addition, ReadyNAS Ultra 4 is TiVo compatible, which means you can archive your favorite television programs and send videos, music, or photos to any TiVo DVR in your home. It even includes an iTunes server for music management.

NETGEAR ReadyNAS Ultra 4 - Open
Features four bays so you can install your own drives and add whatever capacity you need. .

Three USB 2.0 Ports for Adding External Devices

The ReadyNAS Ultra 4 also has three USB 2.0 ports that allow you to connect and share external devices, such as printers, scanners, external hard drives, or flash drives. This makes it easy to add content directly to the ReadyNAS Ultra 4 or back up your existing content.

Four Bays Let You Add Drives for Custom Capacity

This ReadyNAS Ultra 4 comes with two preinstalled 2TB hard drives. It features bay space for four drives, and it can accommodate most 3.5-inch SATA drives.

RAID and X-RAID2 for Security and Reliability

When you're ready for new drives, X-RAID2 auto volume expansion technology makes switches easy. As your media library grows, you can replace your disks with larger-capacity versions--X-RAID2 vertically expands your storage with no reformatting necessary. Plus, ReadyNAS Ultra 4's hot-swapping capability makes it simple to add new disks on the fly--no need to power down or worry about tools.

The ReadyNAS Ultra 4 also offers multiple volume support for RAID 0, 1, and 5, so you can select the configuration that's right for your system. RAID technologies allow your data to be spread out and duplicated across multiple drives, adding a high level of security to your storage system and ensuring that you'll never lose valuable data due to a disk failure.

Secure Remote Access
Features 3 USB 2.0 ports, 2 Gigabit Ethernet ports, and ReadyNAS Remote for sharing/accessing online media. .

Automatic and Online Backups for Peace of Mind

The ReadyNAS Ultra 4 allows you to back up three computers continuously using the included software, so you can trust that your entire system is backed up--not just specific files. In addition, you can use rsync functionality to synchronize and replicate data between multiple ReadyNAS storage devices.

For further protection, the Ultra 4 comes preloaded with ReadyNAS Vault software, which gives you the option of storing copies of your data offsite without worrying about a complicated setup. (A 30-day free trial lets you test file storage using ReadyNAS Vault; later, you can select a paid plan that provides the amount of online storage you need.)

Compact Design and Easy Network Setup

Setting up your ReadyNAS Ultra 4 is as simple as plugging it in and running the included setup disk. ReadyNAS Ultra 4 automatically shows up on your computer as a network drive and configures remote Internet access. For added convenience, the four-bay Ultra 4 measures a compact 5.28 x 8.07 x 8.78 inches (W x H x D).

The NETGEAR ReadyNAS Ultra 4 is backed by a three-year NETGEAR hardware warranty.


Manufacturer Netgear
Mfg Part# RNDU4220-100NAS
SKU 216738844
UPC 606449073232
UPC 14 00606449073232
DLNA and TiVo® compatible
Stream videos to mobile devices
Drag & drop remote access
X-RAID2™ automatic expandable volume
Tech Specs
ReadyNAS Ultra 4
4-Bay Storage with RAID 0, 1, 5 data protection
1.66 GHz Intel® Atom™ single-core processor
Includes two Gigabit Ethernet ports
Includes three USB 2.0 ports
Physical Dimensions (w x h x d):
134 x 205 x 223 mm
5.28 x 8.07 x 8.78 in
Physical Weight
4.70 kg / 10.35 lb without disks
Power Consumption
48W (with 4 x 2TB)
*Using Seagate® 2TB LP drives, with system in idle state
120W server-rated AC power supply
Input: 100-240V AC, 50/60 Hz
Software controlled 92 mm chassis cooling fan
High temperature email alert with auto-shutdown
Environmental Compliance
32° - 104° F
20 % - 80% Humidity (non-condensing)
FCC, UL, CE, RoHS, C-tick, VCCI, CCC, K CC compliance
Available configurations
System Requirements
For LAN setup: an Ethernet Connection
Microsoft® Windows® 7, Vista™, XP, 2000, Mac OS®, UNIX®, or Linux®
Microsoft® Internet Explorer® 7.0+, Apple® Safari® 2.0+, Mozilla Firefox® 2.0+, Opera® 9.5+
Hard Disk Drive(s) - We recommend HDD from NETGEAR HDD Compatible List only
Volume Management
X-RAID2™ auto volume expansion technology
Multiple volume support for RAID 0, 1, 5, 6 (see above for more details)
Journaling mode
User, group, and share-level quotas
Built-in iSCSI target service
Storage Protocols
CIFS/SMB for Windows®
AFP for Mac OS®
NFS for Linux® and UNIX®
HTTP/S for Web browsers
FTP/S Support
Multimedia Streaming
ReadyNAS is DLNA Certified™ and can stream to media players (see for latest):
NETGEAR® Digital Entertainers
Network DVD/Blu-ray players
Game consoles, like Sony® PlayStation® 3 , Nintendo® Wii and Microsoft® Xbox®, Xbox 360®
Music players, like Sonos and Squeezebox™
TiVo® DVRs
Skifta™ clients
Orb and Air Video transcoding
Apple® iTunes® server
Network Security
Encrypted network logins
Secure Sockets Layer (SSL)
Power-Saving Features
Disk spin-down mode
Power On/Off Scheduler
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