If you have experienced data loss with the following criteria then please open support cases with both Western Digital and Apple support:

• MacOS Mavericks 10.9
• WD Drive Manager / Raid Manager software installed
• data loss after a restart
• drives initialised to a single MyBook partition with exposed EFI partition
• loss of all existing partitions and directory structures

If you are an Apple developer then please report an issue with Apple Bug Reporter.

Thank you that helped to remove the WD software.

Now I will work on trying to rescue about 600 GB of info...

Anyone know a good program that can rescue Premiere pro projects and various video file formats?

Mac in Mexico Mexico 

Anyone know a good program that can rescue

There are several reports of corruption with great success of recovery using Techtool Pro 7

http://www.micromat.com/products/techtool-pro

The other being Disk Warrior

http://www.alsoft.com/diskwarrior/



thank you

I have just finnish running Stellar Phoenix, which I think is one of the best data recovery software, and the unthinkable happened - it hasn't found a single file in the 4TB and 6TB drives.

I am trying Data Rescue now but I'm already panicking.

Have you guys got a good result with any data recovery?

I have a completely new issue with my drives!

I have lost the day before all my drives in a daisy chain after updating to maveriks, all wiped out and renamed. There are WD drives and laCie drives, both single drives and RAID. Right after that, they showed up as MyBook, nothing new, I know. Today I wanted to run Disk Warrior on one of the WD drives, but the drive failed to show up in the finder or in disk repair nor in Disk Warrior. The disk makes strange sounds, like startin up and failing, starting up again and again failing. Complete Horror! Tryed out another disk, this time LaCie, the same thing!

Is it possible that the disk can't start up because I erased all WD crap ware on my computer, or what. Next thing I'll do is break the shell open and get a dockstation...

I used this: http://www.prosofteng.com/products/data_rescue.php

However - whilst it did recover the files, as there is no index, you literally just get the files named with a programmatically generated name and the original extension.  This meant I had a few useful files.. but lots of files called something like 4614641.css with no way to match them to the original directory structure or html files.   It also misses a whole bunch of filetypes like mkv that I use as a container to store my raw video work..

So, it was a partial success but I now have months of trying to restructure the recovered data into some meaningful format..

About an hour ago my noname external USB3 went down the drain. This after having spent hours recovering local mail in Mail.app. This is how /Volumes/E-FAT32 and /Volumes/E-Mac (that were on the disk) turned into a single MyBook-partition. What a drag.

Nov  1 09:15:23 my-Mac kernel[0]: USBMSC Identifier (non-unique): 0x00000000 0x411 0x1de 0x1, 3

Nov  1 09:15:29 my-Mac.local fseventsd[40]: could not open <</Volumes/E-FAT32/.fseventsd/fseventsd-uuid>> (No such file or directory)

Nov  1 09:15:29 my-Mac.local fseventsd[40]: log dir: /Volumes/E-FAT32/.fseventsd getting new uuid: CEDBD211-208F-4B4C-BDF8-F072AE832ECA

Nov  1 09:15:29 my-Mac kernel[0]: hfs: mounted E-Mac on device disk2s1

Nov  1 09:15:30 my-Mac.local com.apple.backupd[1894]: Error -35 while resolving alias to backup target

Nov  1 09:15:30 my-Mac.local fseventsd[40]: Events arrived for /Volumes/E-Mac after an unmount request! Re-initializing.

Nov  1 09:15:30 my-Mac.local fseventsd[40]: creating a dls for /Volumes/E-Mac but it already has one...

Nov  1 09:15:35 my-Mac kernel[0]: hfs: unmount initiated on E-Mac on device disk2s1

Nov  1 09:15:44 my-Mac kernel[0]: hfs: Initializing the journal (joffset 0x1d1c000 sz 0x5000000)...

Nov  1 09:15:44 my-Mac kernel[0]: hfs: mounted MyBook on device disk2s2

Nov  1 09:15:44 my-Mac.local mds[66]: (Normal) Volume: volume:0x7fdbf3011e00 ********** Bootstrapped Creating a default store:3 SpotLoc:/Volumes/MyBook/.Spotlight-V100 SpotVerLoc:/Volumes/MyBook/.Spotlight-V100/Store-V1 occlude:0 /Volumes/MyBook

Same to me. I had a WD MyBok in RAID mode, and a single MyBook with Drive Manager installed in 2011. I'm lucky, both drives are ok with the data, I tested on my iMac with Mavericks and my MacBook Pro with Mountain Lion.

But yesterday connected a LaCie single disk through the FireWire chain of the WDs, and saw the symptoms, two drives, one named EFI and the other named MyBook with no data on them.

I removed drive manager and tested again in mavericks and mountain lion, and the data on WD drives still remains.

Hi everyone, I've been trying to follow the thread however I'm not sure whether or not I have the same issue as everyone else. I have a WD 3TB Essentials external hard drive that, after upgrading to Mavericks, is no longer found by Finder or Disk Utility. I looked in Applications in Finder and can not see any Western Digital software so I assume it's not on my machine.

Is there a way to get Finder to recongnize my HD? It was fine before Mavericks...

Thanks, and my apologies if this has already been discussed.

Promise has fully tested and assured compatibility of Pegasus products with OS X Mavericks.
Note that other 3rd party Thunderbolt peripherals daisy chained and their respective software can affect the overall behavior.

Pegasus 2 Series:

http://www.promise.com/promotion_page/promotion_page.aspx?region=en-US&rsn=166

Pegasus 1 Series:

http://www.promise.com/storage/raid_series.aspx?region=en-US&m=574&rsn1=40&rsn3= 47

http://store.apple.com/us/product/H5187VC/A/promise-pegasus-12tb-6x2tb-r6-raid-s ystem

http://store.apple.com/us/product/HA017VC/A/promise-pegasus-r6-18tb-6-by-3tb-rai d-system

http://store.apple.com/us/product/HC657VC/A/promise-pegasus-r6-24tb-6x4tb-raid-s ystem

Pegasus J2:

http://www.promise.com/storage/raid_series.aspx?region=en-US&m=574&rsn1=40&rsn3= 60

Western Digital sent an update today, November 1st. Hope it can help some users:

Dear WD Registered Customer,

UPDATE: November 1st, 2013

As a valued WD customer we want to make you aware of new reports of Western Digital and other external HDD products experiencing data loss when updating to Apple's OS X Mavericks (10.9). WD is urgently investigating these reports and the possible connection to the WD Drive Manager, WD Raid Manager and WD SmartWare software applications. Until the issue is understood and the cause identified, WD strongly urges our customers to uninstall these software applications before updating to OS X Mavericks (10.9), or delay upgrading. If you have already upgraded to Mavericks, WD recommends that you remove these applications and restart your computer. If you have already upgraded to Mavericks and are experiencing difficulty in accessing your external hard drive, please do not save anything to the drive, disconnect the drive from your computer, and contact Western Digital Customer Service at http://support.wd.com/country/ for further assistance.

The WD Drive Manager, WD Raid Manager, and WD SmartWare software applications are not new and have been available from WD for many years. However, solely as a precaution WD has removed these applications from our website as we investigate this issue.

Sincerely,
Western Digital

My Seagate Backup Plus - 3 TB music server has lost all its data. I had my entire iTunes library on it.  it has been not showing up over the last few days after my Mac Mini goes to sleep. i have been forced to pull the power cable several times.

The drive is now showing up on the desktop - empty as if reformatted. 3 years worth of paid music collection - 1000's and 1000's of full uncompressed songs - gone.

thanks Mavericks. thanks Apple.