Previous 1 2 3 4 Next 45 Replies Latest reply: Dec 10, 2014 10:45 AM by MJFreeman
zdenekfromnew york Level 1 Level 1 (0 points)

Hey,

 

I am using 3 volume setup on my 750GB HD. First one for OSX (HFS+), second for data (exFAT) and last one for Windows 7 (FAT32 -> NTFS).

 

Well I am using this setup for over year now and my exFAT partition gets corrupted like every 2 months and this time Disk Utility couldn't even repair it.

When it gets corrupted Windows or Mac cant recognize it but Macs Disk Utility usually repairs it. This time it didn't.

 

Does anyone have same experience? Can it cause some application?

 

It looked like it's cause by Xcode, but I started saving my projects to Mac volume, but obviously it was one of the apps it caused or it wasnt problem at all.

 

 

Can I do something about this or is there another way to share data between those 2 (locally)?


MacBook Pro, OS X Mountain Lion
  • Shootist007 Level 6 Level 6 (16,645 points)

    Could be the exFAT implementation that Mac OS X uses to format the drive. Everytime I tried to use that format, formatted on a Mac, no Windows computer could read that drive. When formatted exFAT on a windows PC both Mac and Windows could read and writer to it.

     

    I suggest you dump the exFAT partition, esoecially it is using the GUID partition table.

  • zdenekfromnew york Level 1 Level 1 (0 points)

    OK, but I still need some way to share (read/write on both) data between those OS, or they need to release Dota 2 for Mac finally

  • Shootist007 Level 6 Level 6 (16,645 points)

    When I briefly had a Boot Camp partition and Win 7 installed on my MBP I could read and write to the Mac partition from Windows and could read and write to the Win partition from the Mac side. At least I think I could. Now that may be something that was included in Boot Camp V4 and you may be running an older version of BC. Not sure.

  • steve359 Level 6 Level 6 (12,120 points)

    32 GB thumbdrive, formatted as exFAT by Windows.  That drive is dedicated to only shared data so should not be corrupted by the partition-mapping.

     

    And very portable, although slow-ish.

     

    Bus-powered USB drive also possible -- light and small.  Bus-powered is bad for backups but seems OK for data-share.

  • zdenekfromnew york Level 1 Level 1 (0 points)

    I got latest of version of BC and cannot write to HFS+ (Mac) drives, read only.

     

     

    exFAT, well I got it formatted by Mac probably. Ill try format it by Windows then and I'll see how that goes but I dont think there will be any difference.

  • steve359 Level 6 Level 6 (12,120 points)

    Made the difference for me, at least.  But that is not a guarantee for you.

     

    Good luck.

  • Shootist007 Level 6 Level 6 (16,645 points)

    Ok sorry I remembered wrong then. No need to have Windows in it own partition on my Mac. I have windows PCs for that.

    zdenekfromnew york wrote:

     

    I got latest of version of BC and cannot write to HFS+ (Mac) drives, read only.

     

     

    exFAT, well I got it formatted by Mac probably. Ill try format it by Windows then and I'll see how that goes but I dont think there will be any difference.

  • NEO_AMiGA Level 1 Level 1 (0 points)

    Had some issues with corrupted exFAT partition that Disk Utility said it couldn't repair.

     

    2012-09-06 21:35:31 +0200: Verify and Repair volume “disk0s4”

    2012-09-06 21:35:31 +0200: Starting repair tool:

    2012-09-06 21:35:31 +0200: Checking file system2012-09-06 21:35:31 +0200: ** /dev/disk0s4

    2012-09-06 21:35:31 +0200: Invalid sector size: 0

    2012-09-06 21:35:31 +0200: Volume repair complete.2012-09-06 21:35:31 +0200: Updating boot support partitions for the volume as required.2012-09-06 21:35:31 +0200: Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.2012-09-06 21:35:31 +0200:

    2012-09-06 21:35:31 +0200: Disk Utility stopped repairing “disk0s4”: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.

    2012-09-06 21:35:31 +0200:

     

    Looked like crazy on the net for solutions but couldn't find any. I started to poke around in the terminal and ran this:

     

    fsck_exfat -d disk0s4

     

    The -d flag is the debug flag and it gave me hope. I saw all my files flashing by and after a while I got this question:

    Main boot region needs to be updated. Yes/No?

     

    I hesitated for a long while but realized that I didn't have any other option. I picked yes and it said that it repaired the drive. It didn't appear on the desktop though. I ran fsck_exfat again and now it said that the disk was ok. I fired up Disk utility and tried to repair the drive there once again and now disk utility could repair it! =))) 

     

    Just wanted to share this lil advice since it seems common that exfat partions gets corrupted in OSX. I'm running 10.8.1 on rMBP here. I have no idea why Disk Utility doesn't call fsck and instead says that the disk can't be repaired. The tools for repairing it is in the OS and apparently and obviosusly it was fixable (...in my case).

     

    Cheers

  • Fusuke Level 1 Level 1 (0 points)

    NEO_AMiGA you just spared me a whole lot of grief!

     

    I didn't realize that exfat drives corrupt easily and that there was a simple tool to fix it (fsck_exfat). I thought I had more serious issues with my partition table so tried to rebuild it using testdisk. Unfortunately i must have screwed up the hybrid mbr since bootcamp is now not bootable. One problem at a time...

  • antoag Level 1 Level 1 (0 points)

    Neo_AMiGa Great Postimg!

    you spare me from the painfull loss of critical files. I am abandoning xfat. I am gald I steped away from the problem and was checking for possible solutions this AM. thanks

  • Sishir Level 1 Level 1 (0 points)

    Neo_AMiGa Great Posting!

    I just recovered all my critical data. Had no backup.

    Thanks a lot


  • Buvy Level 1 Level 1 (0 points)

    NEO_AMiGA you are awesome!  You have my gratitude.

  • dawesi Level 1 Level 1 (0 points)

    use chkdsk in windows on the partition

     

    chkdsk {drive}: /f

     

    does the trick every time.

     

    with non-mac formats always trust windows to fix it, mac is flaky as their format support is lacking.

  • tsharood Level 1 Level 1 (0 points)

    NEO_AMiGA You are my savor!!!!!!!!! Thank you so much I have spent hours trying to resolve this issue over the past year. I origionally discovered that Dawesi was right and chkdsk can fix it most of the time however windows needs to be able to recognise the partion as exfat, if not this option wont work. I spent five hours today trying to figure out how to change my partition back to exfat from ntfs (it is not and never has been). Your solution should be looked at by apple and incorperated into the new disk utility or at least posted somewhere proment on the forum. APPLE pay attention feature this thread!!!!

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