Q: Mavericks corrupts external hard drive

I had the same problem with Mavericks , also Mybook Studio 2TB via firewire 800.

No Bootable Mountain Lion on the WD for me, just the WD Drive Manager installed, which was showing 0% usage.

After a boot the Drive was showing up with a different drive name (MyBook) in Finder, and all data (1.7TB) gone.

This is a unique development.

I have a WD Passport  with FW 800 with 4 partitions (one for each Mac OS starting at 10.6 and file storage)

I was able to install 10.9 on a new partition and all of the data is intact.

I have three of the WD Studio II disks and this is something to keep an eye out for.

FYI, the Drive was not corrupted immediatly after the upgrade. It was running ok for a while, but after one reboot it showed up as an empty drive with the "MyBook" name.

I was able to restore some data with some data rescue software at a friends place (basically got files with no names now), so it seems the partition table got corrupted.

Another interesting thing with Mavericks and this drive seems to be that the drives don't seem to spin down, when my iMac sleeps. I have to shutdown to make the drives go sleep. In Mountain Lion the disks would sleep when the iMac was sleeping.

Same thing happened to me with a WD My Book Studio Edition II 6TB. After calling WD numerous times they gave up and asked me to ask Apple what Maverick does to their raid drive and to try recovering my data with a recovery software. 5TB archive gone at the moment, with a partial backup. I've never seen anything like this. Very serious.

Same thing happened to me: WD my book studio ll. Unit reset and all data gone. It happened several times!! So until apple fixes this I have to use another drive.

Same problem here, except my drive is GTech. It now shows as 'MyBook' which is my old WD drive.

Also found the same problem.  I sent Western Digital a support request, but have had no follow-up.

At first I suspected it was an issue with the SSID not being registered after the upgrade, but this does not now appear to be the case.

A few interesting facts:

1. I have two external WD drives.  One is a 1TB Passport connected via Firewire, and was connected when I performed the Mavericks upgrade.  All is OK!
2. The second unit is a WD My Book Studio Edition II 2TB connected via Firewire, and (I believe) was not connected during the upgrade.  After the upgrade, I was unable to access the contents.  The WD Raid Manager software says the drives are healthy, but 0% of the space has been used.
3. Connected this same drive to an older iMac via USB (OS X 10.6), and shocked to find that again I cannot access any contents.  Raid Manager shows all healthy, but 0% of the space used.
   

I got the same problem. One MyBook Studio II and one MyBook affected. Both are shown as empty in Finder.

Apple, please reply to our problems!

Curious!

I'm starting to wonder if it is only the MyBook Studio series of hard drives that are affected (as opposed to all Western Digital external drives - save GaryB's GTech / WD units) ? 

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Sorry, I think my idea is now false, as a claim of a regular MyBook has been made.

What rescue software did you use?

Mackie169. Try deleting the .DS_Store file on the drive. See my post here https://discussions.apple.com/message/23514806#23514806

People for YEARS have been chirping about NOT buying WD drives on this forum.   This is more proof for same.

Buy Toshiba or Hitachi or Seagate drives.

Ive got just under a 100 hard drives,  and even the free western digital drives I got,....I gave away.

I assume you have some "magical" WD software you installed which came with your WD? This is the likely source for Mavericks incapability. 

Ive been using 30 + diffferent external HD on Mavericks now, and run some huge data collections

ALL EXTERNAL HD  (the 30+) work fine...... of course they arent WD

I assume you have some nasty WD "utilities" on your external drive?

http://www.wdc.com/en/products/products.aspx?id=200

Never install external HD software,...never ever never. Regardless of mfg.

idontknownousername 

, just the WD Drive Manager installed

Ughhh, thats the problem .

NEVER install HD software, it creates problems on Windows and Mac

All HD out of box should be thought of as bricks and formatted for use.

From your comments you have this on it:

http://support.wdc.com/product/download.asp?groupid=111&sid=61