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Item#: 9SIA1UH3H79716

Drobo Direct Attached Storage - 4 bay array - USB 3 port (DDR3A21)

Ships from United States. Most customers receive within 2-10 days.

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  • Desktop Scalable Storage Array
  • 1 x USB 3.0
  • Holds 4 x 3.5" SATA HDDs (not included)
  • Hot Swappable Drives
  • Battery Backed Memory
  • Any Drive Manufacturer or Speed

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Drobo DDR3A21: The Most Advanced 4-Bay Drobo Ever

general information

The third generation of the Drobo holds true to the unique design and simplicity that has made Drobo the best desktop storage solution for storing and protection all your data. It employs the revolutionary BeyondRAID storage technology that protects data against a hard disk crash, yet is simple enough for anyone to use. As long as you have more than a single disk in Drobo, all data on Drobo is safe no matter which hard disk fails. There’s no need to worry about anything else.

It comes with support for USB 3.0 specification and features a completely new architecture, making it more than 3x faster than the previous generation. More impressive, rebuild times are 4x faster, delivering maximum data availability in the event of a drive failure. With the inclusion of battery backup technology, Drobo provides even more data protection in the face of an unplanned power outage.

Migrating is as easy as 1-2-3

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general information

Ultimate Investment Protection

Drobo takes upgradability to the next level. Not only can you upgrade capacity with no downtime by adding new drives or replacing smaller drives with larger ones, you can seamlessly upgrade to a new Drobo by simply removing the disk pack from your current system, and moving it to a new Drobo. Upgrading not only gives you an instant performance boost, but also delivers all the other benefits of the new Drobo.

general information

Data Protection Made Simple

Like all Drobo products, the third generation Drobo is built upon the award-winning BeyondRAID technology. BeyondRAID can be configured to protect against one or two simultaneous drive failures with just one click, automatically protecting your data without any user intervention. In addition, you can purchase the capacity that you need now and increase space by adding drives into empty slots, or by swapping smaller drives with larger ones. When you do, the additional capacity is instantly available.

general information

Fast and Flexibility with USB 3.0

With USB 3.0 support, the latest generation of the original Drobo is more than 3x faster than the previous generation. Not only will accessing your data be fast, but rebuild times have improved by 4x in this generation giving you the peace of mind that your data will be fully protected as quickly as possible. USB 3.0 gives the maximum flexibility to be able to plug in to any Windows or Mac easily and start storing or backing up your valuable data within minutes.

general information

Enhanced Time Machine Backup Support

Pairing Time Machine with Drobo improves your data protection by ensuring your data is safe in the event of hard drive failure. Apple’s guidelines recommend allocating twice the capacity of the Mac’s hard drive for Time Machine. Time Machine users know that it will gradually use all available disk space without an easy way to stop this from happening. With Drobo you can easily control the maximum storage space available for Time Machine backups through Drobo Dashboard.

general information

Power Protecting Your Critical Data

Drobo doesn’t just protect you from a drive failure, but also from potential data loss after a power outage. In every Drobo, we include battery backup technology that protects all data in memory or cache. When power spontaneously goes away, Drobo moves any in flight data to onboard flash in your Drobo so it will be protected and moved to your disk drives once power is restored. This ensures your important information is safe and sound. Even better, your battery recharges itself and is designed to last for the life of you Drobo.

general information

Compact Footprint

Drobo DDR3A21 has been designed to provide high capacity without taking up a lot of your valuable desk space. It is compact, because of Drobo’s unique carrier-less drive bay design, allowing drives to be installed very close to each other.


Learn more about the Drobo DDR3A21

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
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Condition Guidelines

The following guidelines apply to all product categories unless otherwise indicated within specific categories.

  • New : A brand-new, unused, unopened item in its original packaging, with all original packaging materials included. Original protective wrapping, if any, is intact. Original manufacturer's warranty, if any, still applies, with warranty details included in the listing comments.
  • Refurbished : "Refurbished" products have been tested to ensure compliance with original manufacturer specifications, and MAY include a limited manufacturer warranty - see the item's product page for details.
  • Open Box : Newegg only guarantees your receipt of the Open Box product with the purchase of this item. Any accessories MAY OR MAY NOT be included. Newegg will NOT send you any missing accessories, even if it is required to use all of the item’s functions.
  • Used - Like New : All of the instruction booklet or artworks are within the original case and showing no wear and tear. The disc has no visible scratch and in working condition. DLC content may have already been redeemed.
  • Used - Very Good : All of the instruction booklets or artworks are within the original case but showing minimal wear and tear. The disc has light scratches and in working condition. DLC content may have already been redeemed.
  • Used - Good : Either the instruction booklet or the artworks are missing from the original case and showing wear and tear. The disc has light scratches and in working condition. DLC content may have already been redeemed.
  • Used - Acceptable : The instruction booklet and the artworks are missing from the original case and showing wear and tear. The disc has scratches but in working condition. DLC content may have already been redeemed.
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