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  • Western Digital My Book Mirror Edition 2TB USB 2.0 (WDH2U20000N)
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Western Digital My Book Mirror Edition 2TB USB 2.0 (WDH2U20000N)


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  • The safest place for your data
  • Automatic backup software
  • Cooler, quieter, eco-friendlier
  • Capacity Gauge
1 new from $120.00 1 used from $89.99
Power Consideration: This desktop class hard drive requires the use of a power adapter (included) to operate. It cannot be powered by a USB cable alone.

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  • Unlimited Cloud Storage: Never run out of space for all your photos, videos, and files with unlimited storage plans from Amazon Cloud Drive. Try either plan for 3-months free. Learn more


Product Description

Product Description

WD's My Book Mirror Edition dual-drive storage system automatically mirrors your valuable data for extra protection. The USB 2.0 interface and a powerful combination of features make this system the storage solution of choice for photographers, home users, small offices, and anyone looking for extra assurance that their data is safe.

Amazon.com

Amazon.com Product Description

The safest place for your data.

WD’s My Book Mirror Edition dual-drive storage system automatically mirrors your valuable data for extra protection. USB 2.0 interface and a powerful combination of features make this system the storage solution of choice for photographers, home users, small offices, and anyone looking for extra assurance that their data is safe.

Features at a glance
  • Easy installation and set up
  • RAID 0/1
  • Automatic backup software
  • Cooler, quieter, eco-friendlier
  • Capacity gauge
  • User serviceable
  • 3-year limited warranty

Swapping out a drive is easy and you do not need any tools.
My Book Mirror Edition retail packaging

Gain peace of mind with this true data guardian. Organize and archive your vast photo, music, and artwork libraries. View larger.

My Book® Mirror Edition™ 360° view

Secure your vital data with WD’s My Book® Mirror Edition™ dual-drive storage system with RAID Mirroring. With RAID-based continuous data protection, automatic data backup software, and user-serviceability, this is the perfect backup system for your irreplaceable data.

The safest place for your data
Using RAID mirroring technology, this system automatically and continuously duplicates your data. If one drive in this two-drive system ever fails, the system continues to run and your data is safe. How’s that for peace of mind? Learn more about RAID

Automatic and continuous backup software
Back up your computer - just set it and forget it. Every time you save a change it's backed up and then mirrored on the second drive for the ultimate in data protection.

GreenPower technology logoCooler, quieter, eco-friendlier
Designed to use only WD drives with GreenPower™ technology, this system, with its efficient convection cooling architecture, fan-less design, and power saving mode, is reliably cool, remarkably quiet and consumes up to 33% less power* than standard systems.

* Tests based on comparison between a 1 TB dual-drive system using 7200 RPM drives and a 1 TB dual-drive system using WD's GreenPower drives.

Easy to set up, easy to use
You’re up and running in a few simple steps. WD’s intuitive RAID wizard software lets you easily modify your RAID settings.

Capacity Gauge
See at a glance how much space is available on your drive.

User serviceable
Want to upgrade a drive? Simply open the case and replace the existing drive – no screwdriver needed.

System Requirements
Available USB port
Mac® OS X 10.4.11+, 10.5.2+
Windows® 2000/XP/Vista

What's in the Box
Dual-drive storage system, USB cable, AC adapter, Software CD, Quick Install Guide.


More about RAID

RAID is a high-tech acronym for Redundant Array of Independent Disks. The acronym is not important. What is important is that the inclusion of RAID technology in WD's dual-drive external storage systems make them very powerful storage products.

With RAID enabled on a storage system you can connect two or more drives in the system so that they act like one big fast drive or set them up so that one drive in the system is used to automatically and instantaneously duplicate (or mirror) your data for real-time backup.

There are two reasons you might want a RAID system of drives.

1. You need tons of storage space and you need it to be fast. (RAID 0)
2. You want to instantaneously and automatically backup your data. (RAID 1)

Which RAID mode should I use?


RAID Mode Comparison

1. Speed (RAID 0)

Set in high-performance mode (also called striped mode or RAID 0) the storage system gives you the power you need when you're:

  • Designing huge graphics and you need a lightning-fast Photoshop scratch space.
  • Recording large DV files while maintaining clean audio performance.
  • Editing DV or HD video and you want a smooth work flow with no dropped frames.
  • Rendering complex 3D objects or special effects.
  • Performing disk-intensive database operations.
  • Driven to be the first geek on your block with a computer so fast it blows your socks off.

Why is RAID 0 so fast?

It's a bit complicated, but suffice it to say that two heads, or in this case, drives, are better than one. Picture two hoses filling a bucket at the same time or two men bailing a boat and you can understand why two drives striped are faster than one. Data is saved (striped) across both drives and accessed in parallel by both drives so you get higher data transfer rates on large data accesses and higher input/output rates on small data accesses.

2. Data protection (RAID 1)

Set the system to data protection mode (also know as mirrored mode or RAID 1) and the data is duplicated onto one of the drives providing two copies of all the data. This reduces your capacity to the size of a single disk.

So why do I want that kind of redundancy?
It's your data, your family pictures, your movie of baby's first steps, your first novel. Is it important? You decide. If it is, then RAID mirroring if for you.


Product Details

  • Product Dimensions: 8.5 x 7.5 x 8.5 inches ; 3.5 pounds
  • Shipping Weight: 5.6 pounds
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B001B8RSAK
  • Item model number: WDH2U20000N
  • Average Customer Review: 3.6 out of 5 stars  See all reviews (63 customer reviews)
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: July 7, 2004

Customer Questions & Answers

Customer Reviews

Very nice device.
Verlon R. Frost
Do not trust this drive with any important data..
Ryan W. Radtke
I'm using Vista 64 bit system.
Amazon Customer

Most Helpful Customer Reviews

47 of 49 people found the following review helpful By Joe Skrote on October 5, 2008
Verified Purchase
I've owned this drive for about five months at this writing, and use it to store all my video and music files (both mp3 and wav). And I still have 400GB of free space!

Its USB 2.0 interface is fast enough for video playback in a RAID 0 configuration (since it's actually two 1TB drives it can also be set RAID 1 to automatically back up everything you put on it).

It's a fairly small and very attractive package that doesn't get overly warm; if it has cooling fans inside I haven't heard them running yet. I much prefer its keyhole-shaped fluorescent-looking indicator light to the blinking bull's eye I've seen on older MyBook drives. Its up-and-down motion is actually kind of soothing.

Opening the box to replace a drive, if necessary, doesn't look too difficult if you're so inclined. It's quiet but not totally silent -- there's a soft clattering sound when it's working but I don't find it annoying and it's totally masked by movie audio or music.

One bit of advice, do NOT assume that Microsoft Vista's automatic "Defrag Lite" will do a good job on a drive this huge. I started to experience playback problems with recorded video and discovered that the drive was severely fragmented, even with Vista set to defrag it once a week. There's no easy way to analyze the drive for fragmentation with Vista defrag's dumbed-down user interface. And it would be great if WD included a defrag utility in its Drive Manager or Diagnostics Tool -- it doesn't. But there's freeware out there (Auslogics or JKDefrag) that will do a thorough job and, even better, actually show you what it's doing. So defrag this drive thoroughly and often, especially if you copy, move, delete and convert a lot of large video files.
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21 of 23 people found the following review helpful By Amazon Customer on July 9, 2009
We've got about five of the 2TB Western Digital MyBooks for our IT department. We've had them a couple years, approximately. We've learned it's a bad idea to try to use them for anything more demanding than, as advertised, storing photos. For instance, we've learned it's a bad idea to use these in association with backup-to-disk applications. No Go. These USB devices seem only suited for static data that doesn't need to be referenced often. They're far too slow, and they are far too ready to drop their connection to the PC to which they are attached. We've tried them on a variety of PCs and servers. Even today, for example, I'm just trying to copy data to them from across the network -- the device cannot maintain a connection long enough to copy an 800MB folder to it.

We have not tried the firewire connection to see if that works any better.
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21 of 24 people found the following review helpful By J. Davey on June 12, 2009
I purchased this drive with the intent to backup all my family videos, photos and other files. Currently my file server actually has a RAID 1 setup but I thought redundancy can never be too much.
Well - The My Book Mirror Edition was not the answer. At the end of all of this I purchased two of these units, having each one successively fail on me.
I probably only ended up loading 300+ gigs on the drives. They would work well for 2-3 days and then when transferring a large file (typically video) all hell would break loose with the WD raid manager saying I had issues (red icon). After each incident the external drive would not be recognisable by my PC (running XP). The drives would also not work on another of my PCs. I would get dialogs of Unknown USB something and couldn't get the drives to mount.
In both instances I had to take out the physical hard drives to remove my personal data and the actual drives ran without issue. Therefore I can only surmise that the WD system for the RAID setup or the manager is not ready for prime time.
Given my personal experience I would highly recommend people to not consider purchasing this ext. drive if they want peace of mind.
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32 of 40 people found the following review helpful By Al Swanson VINE VOICE on March 17, 2009
I recently upgraded my laptop to a Dell XPS M1530 - running Vista64. I bought a 500gb WD Passport which would work perfectly on my 32bit XP and 32bit Vista boxes, but not my new Dell. So I went to get this drive. I figured the Raid-1 option would end up being safer anyway.

Ho boy! Nope. Freeze after freeze. Took me quite a while to find on WD's site (it's in the Downloads, not FAQ's, not KnowledgeBase) that no 64 bit os is supported. In this day of 4gb+ boxes and the needed 64bit OS's, that's unacceptable.

Too bad. I have 3 others of this model hooked to my network (via NSLU2) and it's a great drive setup. As long as you never connect it to a 64bit box!
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25 of 32 people found the following review helpful By Steve W on March 8, 2009
I bought this product for it's simplicity and the mirror drive. The problem I have is it fails at providing the basics of what one would buy this product in the first place. The My Book I received is clearly defective but for obvious reasons. I was OK with the cheap plastic enclosure since I just plan to have it sit on the desk in a cool well ventilated spot. I like that it would do some power savings since I was not going to be using it all the time. I wanted a mirrored drive since drives fail and even if I can rebuild the data I rather spend the extra now so I would not have to. I am sending my drive back it is defective but I learned something in the process that I can share.
First the product is about the enclosure. Mirror drives Raid 1. I did not have anything fancy planned for this drive. All I needed was a USB connection and to format it for my MAC. No problem. The problem I encountered was the drive kept dismountnig. It would drop on writes and reads. There is no mention of this on WD's knowledge base or help. I checked the forums and there are many accounts of people having the same problem. Some say remove the software, update software, update bios, others say that does not help. I read it happening to both windows and mac users. The claim is the power saving feature causes the drive to go to sleep and unmount. I tried the power button on the back to wake it up but it did not do anything. I pull the plug and re power the device. drive came back. In playing with it I experienced a wide variety of behaviors.
-press button and I have no idea what the button is for.
-Ah when working properly the button wakes it up.
-It does not matter if the drive is in use it will go to sleep.
-setting everything in the OS not to sleep makes no difference.
Read more ›
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