HEADS UP!  If your using AE and Air Disk for Backups

Guys
Quick background, Air Port Extreme, 1 TB WD drive in a Newer Technology Quad interface case. Airport in 5GHz mode wide channel.
I have been diligently testing my Airport Extreme and the 1TB disk connected as an AirDisk for TM backups for over 1 week now. I've hammered this thing making backups time after time, in an effort to move as much data through it as possible.
I thought it was all working fine but, there seems to be a serious issue with this configuration. I can see why Apple's official statement is it's not supported.
*Eventually, you WILL get data corruption, sooner or later you will.*
It seems that the larger your sparse backup becomes the more likely you are to get data corruption. I purposely made my sparse image grow in my testing to see what the results were. The results in fact show that there is indeed data corruption occurring. At first I thought it was related to the distance the machine was from the AE, thinking it was signal strength related, but that turned out not to be the case. I had the machine right next to the AE and still saw the problem.
If you want to test your set up and see if your getting corruption, unplug your AirDisk from the AE and connect it via USB directly to your machine, call up Disk Utility and tell it to repair the disk --- I'm sure your going to be surprised just as I was.
Now here is the thing, once you repair your AirDisk, leave it connected via USB and turn TM back on. It will use it directly attached and use the existing sparse image file for the backup. And you'll never see corruption.
Hopefully, Apple will fined the problem and fix it. I plan to do more testing and see if I can determine what is happening, but thats why Apple as test engineering.

Why not just let TM back up both disks?
As long as the disk with "your work" is formatted with one of the variations of +Mac OS Extended,+ all you have to do is make sure it's not listed in the +Do not back up+ box in TM Preferences > Options. Just be sure it's big enough: see #1 i the Frequently Asked Questions *User Tip* at the top of this forum.
But if you decide to do it separately, then yes, as Chris says, it's much better to partition the backup disk so TM has it's own, exclusive space. See #3 in the FAQ Tip.

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