External HD stopped mounting. Can't mount it!

Discussion in 'OS X El Capitan (10.11)' started by yaxomoxay, Feb 29, 2016.

  1. yaxomoxay macrumors 68000

    yaxomoxay

    Joined:
    Mar 3, 2010
    Location:
    Texas
    #1
    Hi guys - I don't know what happened but I can't mount my external HD anymore (it has external power source, so it's not that, plus it turns on).
    This is what Disk Utility Shows:

    [​IMG]

    [​IMG]

    I noticed the Owners: Disabled. And this is what I see if I run diskutil from terminal to get info:

    [​IMG]


    This is what I get if I try to mount it or do anything else:

    [​IMG]

    [​IMG]

    [​IMG]

    Any other idea? My bet is that it is due to some permission issue... I just don't know how to solve it.

    I run El Capitan
    --- Post Merged, Feb 29, 2016 ---
    Another piece of the puzzle:

    $ sudo diskutil verifyVolume /dev/disk2s2

    Started file system verification on disk2s2

    Verifying file system

    Invalid content in journal

    Journal need to be replayed but volume is read-only

    Checking Journaled HFS Plus volume

    Invalid B-tree node size

    The volume could not be verified completely

    File system check exit code is 8

    Error: -69845: File system verify or repair failed

    Underlying error: 8: POSIX reports: Exec format error
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    Assuming you did not do anything that brought this on and it just happened spontaneously, and based on that failed verification, I'd say you have a bad drive. You might try selecting the drive itself (not the Untitled partition) and reformatting, but that would erase the data of course.
     
  3. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #3
    Can you post the result of
    Code:
    diskutil list disk2

    Try this also:
    Code:
    diskutil verifydisk disk2

    ‘Owners disabled’ is no reason for concern. It is disabled by default and only used when you need file permissions on an external drive. I think only Time Machine uses this by default.
     
  4. Partron22 macrumors 68000

    Partron22

    Joined:
    Apr 13, 2011
    Location:
    Yes
    #4
    Plugged straight into Mac, not into some hub or other?
    Those have been known to cause odd behaviors.
     
  5. yaxomoxay thread starter macrumors 68000

    yaxomoxay

    Joined:
    Mar 3, 2010
    Location:
    Texas
    #5
    Plugged into the Mac.

    KALLT, I will post the results as soon as I get home.
     
  6. yaxomoxay thread starter macrumors 68000

    yaxomoxay

    Joined:
    Mar 3, 2010
    Location:
    Texas
    #6
    I ended up using Diskwarrior. After crunching its stuff all night long it was able to recover a good chunk of the data, although structurally it is a complete mess.

    Of course, the hard drive is not to blame. I am to blame for not having an updated backup (cloud or not) which would have prevented me a data loss and a panic attack.

    Lesson learned.
     
  7. Partron22 macrumors 68000

    Partron22

    Joined:
    Apr 13, 2011
    Location:
    Yes
    #7
    This is a good lesson to learn.
    Now go forth and buy a couple of spare hard drives.
     
  8. yaxomoxay thread starter macrumors 68000

    yaxomoxay

    Joined:
    Mar 3, 2010
    Location:
    Texas
    #8
    Yep!!
    Any HD that can connect to my wifi and work as a media sharing device? (Without plugging usb to a router)
     
  9. oMc macrumors 6502

    oMc

    Joined:
    Oct 17, 2010
    Location:
    Finland & France
    #9
    And I would also suggest to avoid Seagate. As well as WD. They are not famous for their reliability. Hitachi drives are pretty good right now.
     
  10. treekram macrumors 6502a

    Joined:
    Nov 9, 2015
    Location:
    Honolulu HI
    #10
    HGST (formerly Hitachi Global Storage Technologies) is a wholly-owned subsidiary of Western Digital. Although the sale took place in 2012, it was only last October that WD has been allowed (by Chinese regulators) to start fully integrating the company. So if there was a quality difference, don't expect it to last. My last (literally and figuratively) Hitachi drive started having problems less that a couple of years into use (used for media storage, not OS use), less than any Seagate or WD drive I've used for that purpose. Doesn't mean HGST is bad, just how variable the HD experience is from person to person.
     
  11. oMc macrumors 6502

    oMc

    Joined:
    Oct 17, 2010
    Location:
    Finland & France
    #11
    Yeah I know that. And yes, there is a difference in reliability according to some tests (see Backblaze reviews for example). Hopefully WD will improve their quality with the purchase of HGST (let's hope...).

    Anyway, to avoid problems, backups, backups and backups. Buying drives from a good brand can also help. G-Drives from G-Technologies are a little bit more expensive, but not by much, and runs Hitachi drives and also have a 3-years warranty. I think that two years of additional warranty i worth the extra ~30$ (€ in my case). Of course the warranty won't recover your data, so you have to be sure that you have enough backups depending on the importance of your data to you.
     

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