Q: Mybook studio raid 0, empty after installing Mavericks

Its happening on 80% WD Raid My Book on this board and others, and happening entirely on Firewire and Thunderbolt drives

Mine is actually hooked up via USB

I'd also like to call out the importance of people using this thread. If you experiencing this same issue and stumble upon this thread, please post! It will raise awareness of this potentially crippling issue for power users.

Ok.

Unhappily I can confirm this has now happened to me. Strangely it appears to be working fine on my Retina Display 15inch MacBook Pro using the Thunderbolt to Firewire adapter.

However, I needed to use the Thunderbolt port for something else, so thought I'd hook up the drive via USB for the time being. Now have blank drives on either connection.

This has happened on 2 MyBook Studio II 2TB drives.

Very very unhappy.

Thats horrible, how has data recovery gone? 

FIrewire & Thunderbolt drives are having issues with Mavericks and HD using WD Drive Manager , avoid same until a fix is issued if you can.

Ive tested a very long line of USB HD on Mavericks, all seem fine.

*However some are reporting now even USB HD are having problems IF they are running WD software

Recommend anyone DO NOT ATTACH any WD MyBook externals (firewire, thunderbolt or otherwise).     

I dont have same to test, so I dont know if the problem is in the firmware on the SATA bridge or if its a problem with the WD software

Same here.

Lost data on three different external hard drives: 1xWestern Digital and 1xLacie. All connected via FW800.

All were shown up with a "MyBook" and "EFI" partition.

As far as I can see the WD Driver is the one, that corrupts the data (partition table) => "MyBook" is not a default partition name used by Apple.

I removed the whole WD software stuff => hopefully now it works.

Greets, Michael

Greetings all...

OSX Maverick borked my external HDDs too.

setup:

mac mini 3,1 Early 2008

OSX Maverick

1xWD My Book Studio Edition II, 2T raid0 HFS+ journaled, FW800, status: so far ok, disconnected

1xWD My Book Essential Edition 2.0, 1T HFS+ non-journaled, USB2, status: so far ok, disconnected

1xWD My Book (USB 3.0), 2T HFS+ journaled, USB2, status: borked, reset partition w/ "MyBook"+"EFI"

1xLaCie Rugged (Samsung HDD), 500GB HFS+ journaled, FW800, status: borked, reset partition w/ "MyBook"+"EFI"

Disk Utility indicates missing data still there,

tried http://perrohunter.com/repair-a-mac-os-x-hfs-partition-table/ but no luck so far, because OSX Maverick

kept reseting the partition, yes I'm blaming Apple, Inc.

cgsecurity.org photorec can recover the "missing files" but figuring out which files are more up-to-date ones would

take infinite amount of time.

Apple, Inc. should know that there are only 4 major HDD manufacturers.

Apple, Inc. should've made sure the HDD manufacturers to fix bugs before releasing OSX Maverick.

Users lost data, Apple, Inc. and HDD manufacturer should pay!!!

Have you tried uninstalling the WD raid manager software and then following the instructions in that link? I will try that in the morning when I have access to some of my drives (right before I give the go ahead for costly drive recovery). Thanks for the link, it looks promising.

I will try it, too, the first chance I get.

Regarding uninstalling the WD software, Apple tech support told me to find the WD software at System/Library/Extensions. I searched for WD and found 7 files with WD in the name. I copied all, option pasted ("Paste" changes to "Move" in the Edit menu) to new location, then restarted the Mac. I understand that should do it.

I drove in to work to give it a try - no luck unfortunately. The partition details were nonsensical. It was saying it had two 1TB partitions on a 1TB drive, along with a smaller partition. I tried several times to fix the partion map. Tried DiskWarrior for good measure as well. Looks like I will have to go ahead with professional data recovery for sure.

Re the WD software, I just ran the uninstaller for it - looks like it did the same thing you describe.

WD My Book Studio Edition II 6TB - I have this set as 2x3TB drives:

3TB is my data drive,

3TB is timemachine. 

I backup once a month to my 2 additional drives - but in this instance - I have lost the last months worth of work - all my legal work, design work, client work.  I am FU**ING LIVID. 

This is a joke - my MAC was upgraded to Mavericks last thursday, no issues since, I left it on today and after an hour found that a drive marked 'EFI' was mounted.  I unmounted the drive... and it also took down my time machine drive.  After a reboot, the empty 'mybook' drive was there.

No data on it.

Same thing happened to me with MyPassport for Mac USB HD. Disk Rescue seems to get the files but all the names are wrong and stuff. It *****.

I have much to say about this thread, but the immediate issue now seems to be buying a new drive to back up my computer. As Mavericks doesn't seem to work with a large portion of the drives on the market that I would be considering, this is a problem. Does anyone know what brands are specifically supported by this apparently fickle operating system?

Well, it doesn't seem like the physical drive is the issue here, it seems like it was the software running it.

Everyone here seems to have been using WD Drive Manger. Perhaps there's an alternative RAID driver we could use instead of replacing the entire drive?

I bought another WD drive, this time a Passport 2GB. It doesn't require the drive manager as it isn't RAID. Once I get this machine backed up I can breathe easy and maybe look at using the RAID drives again as a secondary (and tertiary) backups.

Conal Wright-Newton 

After a reboot, the empty 'mybook' drive was there.

No data on it.

Amazing, really all data was wiped?   Even after removal of the WD software management utility?

Rocket Science Calgary, Canada 

Does anyone know what brands are specifically supported by this apparently fickle operating system?

Any simplex USB HD will work with Mavericks with NO SOFTWARE control on same, Just a 'blank brick' formatted HD will work fine.

Ive tested all manner and 30+ HD with Mavericks just fine,.....all issues are those with Thunderbolt, Firewire drives (sleep issues),......and serious issues with WD drives with its management software installed, and especially ANY WD RAID hard drive.

I have 2 LaCie RAID drives (4TB 4big Quadra connected via FireWire800 and 6TB LaCie 2big connected via Thunderbolt) that seemed to have been affected by this issue. Both were working fine under 10.8 and now Disk Utility reports ridiculous RAID configurations that have RAID slices spanning the two drives!

I just bought a new 6TB LaCie 2big so I could copy the data that I'm still able to read off the two other arrays. When I connected the new LaCie 2big, Disk Utility reports that it's RAID configuration is again spanning multiple enclosures which is just insane. I'm pretty convinced this is an issue with OS X...

Keeping all my external drives offline until there is a fix for this (hopefully soon).