Summary: I bought this to replace an old unit I had that crashed hard. It took me weeks to recover the data and I thought the hard crash was a fluke. However, < 2yrs later and the drive crashed hard again. Thankfully the crash only corrupted 1 of the disks. I was able to restore my data by hand but I will never buy another one of these again!. Moved to apple timecapsule because it claims it uses server class drives.
Summary: This may be the low end for NAS devices, but I have not experienced a failure with this system since I purchased it. Writing to it tends to be a little slow on my network, but for infrequently written data or data you need accessible from multiple devices, this works well.
Summary: Forget about it if you want to use it as a backup storage. For large backup files, you will end up with average of 100kB/s, not MB! Set up is quite easy and it works fine but way too slow. I've try to find some fixes but nothing do yet. Full of post of the same problem on the net. Overall, try something else....
Summary: I already have another smaller version of the My Book World and I needed to expand for my sudden collection of iTunes children's movies. Having this setup makes sharing between my computers, devices and my AppleTV a snap. The extra bonus is the deep level of customization that can be done by jumping on the command-line level of the NAS. I've already used it to set up a DNS server and other random additions I needed on my network.
Summary: I bought this system for my office. I live in Florida and had a power spike this summer, the system failed during one of our summer storms. I was able to recover my data by utilizing a third party RAID rebuild software but the the Western Digital drive itself was toast. I was happy that the RAID secured my data, but now I have this unusable shell.
Summary: I have two of these on two different networks. Both of them stop working and I have to unplug them to restart them. Western Digital Customer service hasn't been any help. The last thing they wanted to blame the fact that I had it plugged into a switch instead of the router. Since I have two on different networks, both with the same issue, obvious it is an issue with their firmware. They should have a "keep alive" program on the drive anyway.
Summary: I had my first WD NAS fail, AFTER 1½ YEARS. I kept it running and copied all data from it to a third disk. I bought a new drive and the NAS rebuilt the mirror and worked for several months before the new drive failed. I backup the data again to a third disk. WD replaced the whole unit, and upgraded it to a larger model. The WD NAS has been running for two years 24/7. I just checked and it has 185 days since the last time I had to shut it down to move it.
Summary: I wouldn't recommend this product to anyone, and I'm afraid I can't recommend Western Digital based on this purchase experience. I gave it one stars because it works occasionally, but only after a lot of fiddling. I have two macs, a windows PC, a robust home network, and I'm running the latest firmware on every piece of hardware. Yet still, this hard drive is challenging to access, impossible to map to, and lacks any reasonable online support.
Summary: WD sent me this as a replacement for another of their mirrored drives that failed on me - this replacement was no exception. After transferring all my data (UNBELIEVABLY SLOWLY!!!) I got the dreaded RAID 1 DEGRADED message - and had to go through the RMA return process again (1/2 hour on the phone, $10 shipping!!!) WD tech support are really good, and sent me a replacement no questions, but the replacement did exactly the same as the first one.