For some reason i can't access my external HDD anymore. It's not showing up in Finder, although i can see it in the Volumes folder and in Disk Utility app.
When i access the HDD from terminal and try to list the files via ls I get permission denied. I tried running
sudo chmod 755 myHDD
now ls returns nothing at all, like an empty folder. At this point I figured the first step is to try to unmount it correctly, which i tried in various ways:
Via Disk Utility: Failed and wants me to make sure nothing is in use on the HDD.
In terminal i tried these methods:
diskutil unmountDisk force myHDD
"Unmount Failed"
sudo umount /dev/disk1
"umount: /dev/disk1 not currently mounted", but it still exists in Volumes/myHDD
hdiutil detach /dev/disk1
"hdiutil: detach: timeout for DiskArbitration expired"
hdiutil eject /dev/disk1
"hdiutil: detach: timeout for DiskArbitration expired"
As you can see nothing is working for me. I can't unmount it, and when i unplug it form the computer it persists in Disk Utility.
All helps and tips are greatly appreciated!
EDIT:
Tried with to repair the disk from Disk Utility with Tuxera NTFS and got this error message:
Tuxera NTFS could not mount /dev/disk2s1 at /Volumes/VERBATIM HD because the following problem occurred:
Aligned I/O enabled. CBCIO enabled. WARNING: ReadFully - I/O error while reading from file (5: "Input/output error") WARNING: failed at: pread(3, 0x100580000, 282624, 17980981248); WARNING: bytesRead=0 ntfs_attr_pread_i: ntfs_pread failed: Input/output error Failed to read $UpCase, unexpected length (-1 != 131072). __ntfs_volume_release(): Inode 10 still have 1 references. Failed to mount '/dev/rdisk2s1': Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.