realtwang

Q: Anyone else having problems with external disks unmounting randomly/suddenly on Mavericks?

I have been having an issue with Mavericks unmounting my external USB disk suddenly, followed by a Finder notification that the disk was ejected improperly.  This has only started since upgrading to 10.9.  I have tried unchecking "Put hard disks to sleep when possible" in System Prefs, but it has not helped.  Weirdly, the drive icon does not disappear from the desktop when this happens, so I don't know if it's actually ejecting, or if the system just thinks it is.  At any rate, it does appear to be a bug.

MacBook Pro (17-inch Early 2011), OS X Mavericks (10.9), 8GB RAM

Posted on Oct 30, 2013 10:51 PM

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Q: Anyone else having problems with external disks unmounting randomly/suddenly on Mavericks?

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  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 11, 2013 2:55 PM in response to eM_NL
    Level 1 (0 points)
    Nov 11, 2013 2:55 PM in response to eM_NL

    Mybe another random event but

     

    I read through this

     

    C10. "Error: (-50) Creating directory"

    or "error ... while creating the backup folder."

     

    trying to fix this and my timemachine problem.  By chance I changed my partitioning from the GUID to the apple partition table and my problems stopped.  The drive that randomly disconnected over and over stayed connected and completed a full time machine backup.  So far this has fixed the problem and the computers seems to no longer be locking when the drive is connected and disk util is functioning normally.

     

    fingers are crossed.......

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 11, 2013 2:59 PM in response to 0ut1aw0
    Level 1 (0 points)
    Nov 11, 2013 2:59 PM in response to 0ut1aw0

    The changes above seemed to help but I no more than finished adding the reply and bang, color wheel spinning and the the drive unmounted with the disconnect error.

     

    So back to looking for an answer

  • by Brian Bauer,

    Brian Bauer Brian Bauer Nov 11, 2013 3:09 PM in response to realtwang
    Level 1 (0 points)
    Nov 11, 2013 3:09 PM in response to realtwang

    Fixed. At least for me, and for now.

     

    As I reported earlier, immediately after installing Mavericks, my external drives started randomly disappearing/apperaring. I gave feedback to Apple, and started scouring the forums.

     

    I cannot relocate where I saw the suggestion of a fix:

    Delete Google Drive.

     

    So I deleted Google Drive, and have had no more drives vanishing and reappearing.

     

    Hope it works for you -- and continues to work for me.

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 11, 2013 3:23 PM in response to Brian Bauer
    Level 1 (0 points)
    Nov 11, 2013 3:23 PM in response to Brian Bauer

    Hmm

     

    I don't have a google drive connected but I do use gmail.  Makes me wonder what could be acting like a oogle drive.

     

    I have no "cloud" services connected.

  • by eM_NL,

    eM_NL eM_NL Nov 11, 2013 11:46 PM in response to Brian Bauer
    Level 1 (5 points)
    Nov 11, 2013 11:46 PM in response to Brian Bauer

    I don't have Google drive installed.

  • by bamirian,

    bamirian bamirian Nov 12, 2013 9:14 AM in response to 0ut1aw0
    Level 1 (0 points)
    Nov 12, 2013 9:14 AM in response to 0ut1aw0

    I disabled Google Drive and within about 10 seconds of testing, my external USB drive disconnected by itself, re-mounted and then proceeded to do so again 3 times in about 5 minutes. This only happens on my MacBook Pro. The same drive on my iMac is fine-- both running Mavericks, OSX 10.9.

     

     

     

     

     


  • by eM_NL,

    eM_NL eM_NL Nov 12, 2013 9:29 AM in response to bamirian
    Level 1 (5 points)
    Nov 12, 2013 9:29 AM in response to bamirian

    That is interesting. Maybe it has something to do with USB 3.0 and Mavericks? What are the specs of your macbook pro and your imac?

  • by Brian Bauer,

    Brian Bauer Brian Bauer Nov 12, 2013 9:21 AM in response to bamirian
    Level 1 (0 points)
    Nov 12, 2013 9:21 AM in response to bamirian

    All right then.... it's something else.

    However, I have not had any unmounts/remounts since removing Google Drive.

  • by bamirian,

    bamirian bamirian Nov 12, 2013 1:06 PM in response to bamirian
    Level 1 (0 points)
    Nov 12, 2013 1:06 PM in response to bamirian

    Scratch that... it does happen on my iMac too.... for some reason it wasn't happening at all and then I suffered a disconnection on my iMac about 2 hours into at 3 hour file copy. Since then, it's been disconnecting repeatedly.

     

    Another hopefully interesting bit of info... I only suffered the disconnection on one external drive... a Fantom USB. A 1TB Western Digital 2.5" attached at the same time kept going without disconnect.

     

    My MBP is a 2.66 GHz Intel Core 2 Duo, mid 2009

    My iMac is a 3.4 GHz Intel Core i7, late 2012

     

    Finally.. the disconnect only seems to occur when the drive is mounted. I unmounted via Disk Util and the drive has remained solidly connected so far. This makes me think it's not a physical connection issue.

  • by bamirian,

    bamirian bamirian Nov 12, 2013 1:19 PM in response to bamirian
    Level 1 (0 points)
    Nov 12, 2013 1:19 PM in response to bamirian

    I just tried re-mounting the partition and immediately received a 'Disk Not Ejected Properly' message and the drive completely disappeared from Disk Utility.

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 12, 2013 3:34 PM in response to bamirian
    Level 1 (0 points)
    Nov 12, 2013 3:34 PM in response to bamirian

    anyone tried this

     

    http://support.apple.com/kb/HT3964

     

    Buddy of mine said to try it but I need to give TM some time to finish first.

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 12, 2013 4:56 PM in response to 0ut1aw0
    Level 1 (0 points)
    Nov 12, 2013 4:56 PM in response to 0ut1aw0

    Resetting SMC didn't help

     

    Now I have reset the SMC and the PRAM

     

    will repost when it works or fails

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 12, 2013 5:03 PM in response to 0ut1aw0
    Level 1 (0 points)
    Nov 12, 2013 5:03 PM in response to 0ut1aw0

    That did not take long

     

    SMC and PRAM reset di nothing to improve

     

    Time Machine logged this

     

    Property list invalid for format: 200 (property lists cannot contain NULL)

    Starting manual backup

    Backing up to /dev/disk1s3: /Volumes/TimeMachine750/Backups.backupdb

    Forcing deep traversal on source: "MacBookProSSD" (device: /dev/disk0s2 mount: '/' fsUUID: F2FEAA99-446B-31A9-8014-EAFE7FDC1AAA eventDBUUID: 35305D88-884C-4FF4-90D1-D1ADA3E2CA8C)

    Found 617749 files (Zero KB) needing backup

    104.9 MB required (including padding), 712.12 GB available

    Waiting for index to be ready (100)

    Stopping backup.

    Error: (-36) SrcErr:NO Copying /Users/twoodard/Library/Mail/V2/IMAP-terry.w.woodard@imap.gmail.com/[Gmail].mbox/All Mail.mbox/D4037B67-A3B7-4141-8FFB-1DB08B2F8C59/Data/1/Messages/1406.emlx to /Volumes/TimeMachine750/Backups.backupdb/Terry’s MacBook Pro/2013-11-12-174943.inProgress/3EEB838A-8F0B-4B29-9887-6DB2C9E07D7A/MacBookPr oSSD/Users/twoodard/Library/Mail/V2/IMAP-terry.w.woodard@imap.gmail.com/[Gmail].mbox/All Mail.mbox/D4037B67-A3B7-4141-8FFB-1DB08B2F8C59/Data/1/Messages

    Copied 10864 items (2.64 GB) from volume MacBookProSSD. Linked 104.

    Error writing to backup log.  NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Input/output error

    Copy stage failed with error:11

    Error writing to backup log.  NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Input/output error

    Backup failed because the destination disk was ejected or disconnected unexpectedly!

    Backup failed with error 27: The connection to the backup disk was interrupted.

  • by GJx,

    GJx GJx Nov 13, 2013 1:07 AM in response to realtwang
    Level 1 (0 points)
    Nov 13, 2013 1:07 AM in response to realtwang

    This seems to only occur on my external HDD's that are partitioned (NTFS and Mac OS). When I use a

    Mac OS Extended (Journaled) partion drive only, there is no issue. Perhaps you have the same scenario?

  • by 0ut1aw0,

    0ut1aw0 0ut1aw0 Nov 13, 2013 6:38 PM in response to GJx
    Level 1 (0 points)
    Nov 13, 2013 6:38 PM in response to GJx

    all mine are journaled

     

    But now im in a unique place, i happened to just receive a new iMac and it is loaded with MtLion

     

    All the drives work fine

     

    But on my MacBook with Maverick, no go

     

    Also have a powered hub coming, will also report on that when it arrives

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