Mybook studio raid 0, empty after installing Mavericks

I don't know...BTW all my drives are fine. No DATA Loss (yet).

Are only RAID Drives affected? I own a WD MyBook Elite (1 TB, USB 2.0 only).

Does it still work?

I haven't done the upgrade to mavericks yet. If non-RAIDS like mine are affected, i'm gonna wait.

Same issue for me. WD My Book Studio II was conntected using Firewire 800 to my Thunderbolt display during Upgrade to Mavericks. A few days later, my two partitions (NTFS and HFS+) were gone and replaced by a EFI EPS and a HFS+ partition. No data is accessible anymore 😟

Additional note: The drive was configured as RAID 1 using the WD Raid Manager Utility. The Utility was still installed during/after the upgrade.

Ryu01, I have heard about non-raid users affected as well.

I have 6 (non-raids) and they all work. Have been backing them up, transfering large amounts of data back and forth...no problems so far. Have had Mavericks for about a week.

BUT THAT COULD CHANGE, and I am aware of that. I have multiple back ups of the same data so If one drive goes I have another Identical drive that I will leave "Offline".

AS WELL AS, I formatted my drives the moment I hooked them up with Apples Disk Utility I never used Smartware.

Don't know whats going on but I know from experience this kind of thing ***** and I hope those people affected come out O.K.

BTW...I'm on an older system...MBP 2008 Unibody, USB and Firewire, not using Thunderbolt

Thanks Anton and Kilgo! I have only one and i'm not gonna take the risk... Better i'll wait until it's solved...

Good Move.

Kilgo - are your drives GUID or APT formatted - that I think might be the key here

My Passport 0748:

Product ID: 0x0748

Vendor ID: 0x1058 (Western Digital Technologies, Inc.)

Version: 10.15

Serial Number: xxxxxxxxxxxxxxxxxxxxxxxx

Speed: Up to 480 Mb/sec

Manufacturer: Western Digital

Location ID: 0x26200000 / 2

Current Available (mA): 500

Current Required (mA): 500

Capacity: 1 TB (1,000,170,586,112 bytes)

Removable Media: Yes

Detachable Drive: Yes

BSD Name: disk1

Partition Map Type: GPT (GUID Partition Table)

S.M.A.R.T. status: Not Supported

Volumes:

EFI:

Capacity: 209.7 MB (209,715,200 bytes)

BSD Name: disk1s1

Content: EFI

disk1s2:

Capacity: 999.83 GB (999,826,612,224 bytes)

BSD Name: disk1s2

Content: Apple_CoreStorage

Boot OS X:

Capacity: 134.2 MB (134,217,728 bytes)

BSD Name: disk1s3

Content: Apple_Boot

Volume UUID: 266F981E-007C-361F-A428-F93ABEF59E06

This post really scared me.

I also have a MyBookWorld 4TB RAID0. Fortunately, I did not have any resulting data loss.

The details of my upgrade: I did not have the WD RAID Management software installed during the time of upgrade and there was no resulting loss of data. I also did not make the upgrade while plugged into any hard drives.

Hope this helps.

My WD Studio 1TB redid the deed last night just over a week after upgrading to Mavericks - don't assume that this is an upgrade only issue!!

I just received advice from WD to remove all WD Software and restart my computer. Other than that they just told me to wait, but reading all posts here I still don't think it's safe to attach the HD again.

Same issue here. WD My Book Studio II was conntected using USB to my MacBook Pro during upgrade to Mavericks. A couple days later, my partition (HFS+) were gone and replaced by a EFI EPS and a HFS+ partition.

Drive was configured as RAID 1 using the WD Raid Manager Utility.

Utility was still installed during/after the upgrade.