exFAT volume often gets corrupted

Unfortunately, I have the same issue.

Macbook Pro (2014) with 240 gig Mac Partition, 240 gig Windows 8.1 partition, Rest Exfat partition.

Sometimes when I boot from Mac to Windows (Startup disk and select Bootcamp, then restart) the exFAT Data partition shows as RAW.

The chkdsk Drive: /R fixed it twice now, but I'd rather avoid that happening at all.

Does anyone know a valid way to avoid the drive corruption? I'm worried crazy about my data =/

As far as I can tell, to repair exFAT volumes, you can also use:

diskutil verifyVolume /dev/disk#s#

OSX will unmount the volume and call the appropriate flavor of fsck (e.g., fsck_msdos or fsck_exfat).

Can you help me?

My hard drive detect by Disk Utility

Mount Point : Not mounted
Capacity : 2 TB (2,000,395,698,176 Bytes)

Format : ExFAT
Available : -

Owners Enabled : -
Used : -

Number of Folders : -
Number of Files : -

But after I do diskutil list

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *2.0 TB disk2

1: Windows_NTFS Job 5 2.0 TB disk2s1

And after I do diskutil verifyVolume /dev/disk2s1, it show

Started file system verification on disk2s1 Job 5

Verifying file system

File system check exit code is 1

Error: -69845: File system verify or repair failed

Underlying error: 1: POSIX reports: Operation not permitted

Can anyone help? >,<

It says "operation not permitted". It should mean that you need to call it with sudo

sudo diskutil verifyVolume /dev/disk2s1

I can confirm that if you get

fsck_exfat: Could not update main boot region: Bad file descriptor

after running sudo fsck_exfat -d disk#s# you'll be able to fix the disk using Disk Utility

Please Help,

I have read this entire thread, however, my difference is I do not have a s# when I type "diskutil list". My drive only shows as "disk2". The following is a cut and paste of what I see in terminal. I have run a full scan of the drive with R-studio and it shows that the partition is intact, however, neither windows nor OS X will mount it.

Last login: Tue Jul 14 15:40:04 on console

Jacksons-MacBook-Air:~ Jacksons_MacBookAir$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 499.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *499.0 GB disk1

Logical Volume on disk0s2

11616BA5-2978-4F7D-A440-F91A2758EE65

Unencrypted

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: *3.0 TB disk2

Jacksons-MacBook-Air:~ Jacksons_MacBookAir$ sudo fsck_exfat -d disk2

Password:

Opening /dev/rdisk2

** Checking volume.

** Checking main boot region.

fsck_exfat: Invalid jump or signature

Main boot region is invalid. Trying alternate boot region.

** Checking alternate boot region.

fsck_exfat: Invalid jump or signature

Alternate boot region is invalid.

** The volume could not be verified completely.

Thank you in advance,

Jack

Excellent!

Thanks for your help.

Solved my issue.

Hey~

I got the exact same problem.....did you managed to find any solution?

HEEEELP!

I used to do this every time my exfat partition had vanished. Now EL CAPITAN update wont let me do that anymore!!!

Any UPDATE on this for EL CAPITAN?

Like Jack above, I verified the disk name and when then typing sudo fsck_exfat -d disk1

I end up with

[XXXXX:~] XXX% sudo fsck_exfat -d disk1

Opening /dev/rdisk1

fsck_exfat: Opened /dev/rdisk1 read-only

** Checking volume.

** Checking main boot region.

fsck_exfat: Invalid jump or signature

Main boot region is invalid. Trying alternate boot region.

** Checking alternate boot region.

fsck_exfat: Invalid jump or signature

Alternate boot region is invalid.

** The volume could not be verified completely.

and nothing can be done

any ideas? I have both my backup disks corrupted at the same time...

And when I target the lesser volume I get:

[XXXX:~] XXX% sudo fsck_exfat -d disk1s2

fsck_exfat: Opening /dev/rdisk1s2

Can't open /dev/rdisk1s2: Resource busy

what can I do?

Hi did you find a way to solve this? I am having the same problem.😢

I'm also having the 'resource busy' issue. My situation *****...I just backed up my data to my exfat drive so I could restore/backup to/from both mac and boot camp. Now I've erased my internal HD and installed El Capitan cleanly...and the partition with my backup data won't mount...great.

Try running (where disk0s4 is your exfat) a few times...

sudo fsck_exfat -d disk0s4

Then if this doesn't work go to windows and use:

chkdsk d: /F

(change d: to your drive letter on windows)

Then return to osx and see if it's up and repeat... sometimes I need to repeat both.

Yep ! Did this, after figuring out which disknsnn it was... this completed, updated, as you showed, then I ran disk utility, and it made some repairs, and 2 TB of data magically re-appeared !

Thanks !

I have an external storage with 2 x 2TB ( Stardom 2Bay, JBOD mode ) that was working nicely with my Macmini .

Somehow since last week the disk is not readable anymore. I got the message that " The disk you inserted was not readable by this computer " and it asked to "Initialize", "Ignore" or "" Eject".

OS is the newest El Cpatian (10.11.5) and I've tried other enclosure and docking station and all saw the same message.

I also tried multiple computers (MBAs, MB, PC Win 7) and the same issue.

I then started trying to repair it on Terminal: "diskutil list" showed me the disk is now disk3 without partition.

So I did this first: sudo diskutil verifyVolume /dev/disk3 I got the error message: " Error starting file system verification for disk3: Unrecognized file system (-69846)" .

Then I found this thread and used "sudo fsck_exfat -d /dev/disk3".

Now I got the message:

"Opening /dev/rdisk3 ** Checking volume. ** Checking main boot region. fsck_exfat: Invalid jump or signature Main boot region is invalid. Trying alternate boot region. ** Checking alternate boot region. fsck_exfat: Invalid jump or signature Alternate boot region is invalid. ** The volume could not be verified completely."

So now how am I supposed to fix this? Thanks for your suggestions.