External firewire MyBook not mounting

Post-Mavericks upgrade, this external firewire MyBook is not recognised. Previously it ran OK under Snow Leopard (and still works fine if I boot up into SL).  I am not nor have I ever run any of the WD software that caused data loss.  So am perplexed.
Is this a WD issue or a Mavericks issue?

Here's the strange thing.  Boot up Mavericks....not mountable. Not visible in Disk Utility.
Boot up Snow Leopard.  It mounts and (obviously) visible in Disk Utility.
I've tried a slightly different MyBook and that works fine and so it looks like some WD problem perhaps?

Similar Messages

  • External Firewire Drive not Mounting

    Hi, I've been searching these forums but can't find an aswer to my question. I just got a new 27" iMac, and purchased a Thunderbolt-to-Firewire adapter. I have 3 external Firewire drives, two of which are DC powered (the third, I understand, might be a lost cause, as it's bus powered, and I gather the bus power from TB won't power Firewire drives). At any rate, I'm not seeing either of the DC powered drives showing up, which is a big concern as I have about 5TB of stuff on them!
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    Message was edited by: slverice

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  • External drives will not mount if the wi-fi is on!

    I have had no replies where I had previously posted so I thought I would try here as I think that it is mainly an Airport problem.
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    It was not until Mac OS X 10.6.4, not possible to run on a 10.2 machine, that ExFat was supported.
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  • My external HD does not mount despite it appears on Disk Utility

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    If DiskWarrior can't fix it, you might try Data Rescue II...
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    http://www.subrosasoft.com/OSXSoftware/index.php?%20mainpage=product_info&productsid=1
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  • FIREWIRE DRIVES NOT MOUNTING OR BEING RECOGNIZED

    After a recent software update, I cannot get my 3 external Firewire HDs to mount or even be recognized. Often in the past I needed to mount the drives via Disk Utility, but they were are always recognized.
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    It really sounds like you need one of these...
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  • Lacie firewire 800 external hard drive not mounting in mac os 10.4.8

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    [email protected]

  • 2 different brand USB external hard drives not mounting- Firewire ok

    Hi, first timer here so apologies in advance.
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    Hello Bob,
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  • External Drive does not mount with Firewire but is ok with USB !

    Since 10.4.4 my external drive is no more recognized using firewire, but it mounts perfectly with USB
    Using FW request me to reinitialize the disk, but then, the apple disk utility it is unable to reformat!
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    I connected the drive to my old IMac G4 700 and evrything is fine, FW and USB, using the same drive, using the same cable. I did repeat the test many times it is always ok with the old mac and it never mounts with FW on my newer Ibook.
    I did reset the openfirmware but that was not successfull!
    Then I brought both iBook and the faulty Drive to a friend (he owns a powerbook and also an external drive)
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    Then he tried his external drive and was very surprised to find the same fault with his drive and his PB using FW. (as for me everything is ok with USB!)
    We are both very puzzled, our drives did work well before, (before 10.4.4 , and 10.4.5 did not improve!)
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    In addition I tried with the same cable to alternatively start, using the target mode, the ibook and the imac. For each test they were both recognized as external drives as they should..
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    - Disk mount ok with USB (1 or 2)
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    - FW Cable seems to be ok as targuet mode works properly
    has anybody any idee?
    It would be very munch appreciated..
    thanks a lot for having read this long post..
    External hard drive P/N:
    the western digit disk 160G is in an enclosure referenced
    Prolific PL3507 Combo Device
    I tried to exchange the disk of this box with an old maxtor with the same bad result!
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    Hi Andre, I can't remember except to say that it was mounting fine with tiger and I was able to copy files to it for backup purposes.
    I just hooked it up to a PC and windows tells me the drive is not formatted. That's not a good sign, and this was stupid: I think I had the drive hooked up to my Mac Pro during the upgrade.
    Idiotic, granted. But this was an upgrade, not a full install and I maybe was trusting in Apple's ability not to do extraneous stuff during an install like windows does. Oh well...
    I appreciate any further ideas. Many Thanks, Frank.

  • External hard drive not mounting - what's happening?

    All of a sudden one of my external firewire drives is not mounting, but that's not all....
    it's not showing up in disk utility, not showing up in system profiler, not showing up on desktop, not showing up in finder, not showing up in Disk Warrior, and not showing up in TechTool.
    When I turn on the power, it seems to spin up but doesn't mount. No usual noises either.
    Could it be a faulty controller board on the enclosure?
    Any suggestions?
    Really hope to figure this out, cause it has my entire itunes collection (500gb) on it.
    Thanks in advance.

    gr8fl4295 wrote:
    All of a sudden one of my external firewire drives is not mounting, but that's not all....
    it's not showing up in disk utility, not showing up in system profiler, not showing up on desktop, not showing up in finder, not showing up in Disk Warrior, and not showing up in TechTool.
    When I turn on the power, it seems to spin up but doesn't mount. No usual noises either.
    Could it be a faulty controller board on the enclosure?
    Any suggestions?
    Really hope to figure this out, cause it has my entire itunes collection (500gb) on it.
    Thanks in advance.
    First, try another FW drive or device in your computer to be sure that FW is working.
    If you have more than one FW port, try the drive in it.
    Change FW cable.
    Try the external HD on another Mac (do not use a PC!!!)
    If none of above works, it's most likely the logic card in the enclosure, and not the external HD. I believe your data are OK.

  • After upgrade to Snow Leopard, my external drives do not mount...WHY?

    I have spent most of this morning trying to find an answer to why my external hard drives are not mounting in 10.6.1. I have never had a problem with these drives (4 firewire drives). Not one of the will mo0nt. They do not show up under Disk Utilities either. these forums never get to the point and this is very frustratiing. I am not new to mac, I have used a mac since 1989 - never have I had a problem like this. And it seems like others are having the same problems to varying degrees. Why is there no clear answers to fix this? HELP? I need to get to my client files.

    If they are Firewire, read on.......
    Thought you could use this info about getting FireWire to work!
    First, you should always Repair Permissions in Disk Utility before and after any update; I would do that now. If you installed your update with FireWire plugged in, your Mac may not recognize it anymore.
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    If that still didn't get it Zap the PRAM. While restarting Mac hold down the following key combo Command-Option-P-R. Keep holding those keys down till you hear the second start-up chime, then release.
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  • External FireWire Drive Stops Mounting

    Friends,
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    Many thanks in advance,
    Greg

    Hello Andy,
    Thank you for your help.
    1. The drive just stopped working one day. I didn't do any upgrades, it just stopped working.
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    Thanks again,
    Greg

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    Hi,
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    Thanks
    pax

    BDAqua wrote:
    What exactly shows in System Profiler>Hardware>USB for those drives?
    Boot from the Install Disc & see if they show up, not grayed out in Disk Utility.
    1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
    2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
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    We were thinking along the same lines. While at home I dug up a firewire enclosure and put a bootable GUID formatted drive in it (that I had in one of the usb enclosures) and started her computer holding down the option key and then chose to boot from the external firewire. All usb drives are now mounting upon connection. I asume that her drive has bad sectors on it (even though the SMART status says it's OK) and is not loading all the drivers properly for USB to mount. I was suspicious from the beginning that the OS was corrupt when she first had me look at it. It was at that point that I booted it in target mode, connected to my Macbook Pro, and then CCC'd to a usb drive that I had. I then had a couple of difficulties installing the new OS. Should have known......
    I am now going to put a new drive in it for her and she'll be up and running.
    Thanks so much for your help and thoughts that got me thinking as well.
    pax

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