Re: Corrupted USB drive

[Gary Dale <garydale@torfree.net>]

On 25/02/15 06:03 PM, German wrote:
> On Wed, 25 Feb 2015 16:06:58 -0500
> Gary Dale <garydale@torfree.net> wrote:
>
> > On 25/02/15 03:09 PM, German wrote:
> > > Hi list, can't mount my usb drive. It seems it is corrupted. I tried to run ntfsfix and here is its ouput:
> > > digger@digger:~$ sudo ntfsfix /dev/sdc1
> > > Mounting volume... ntfs_attr_pread_i: ntfs_pread failed: Input/output error
> > > Failed to read of MFT, mft=17625 count=1 br=-1: Input/output error
> > > Inode is corrupt (5): Input/output error
> > > Index root attribute missing in directory inode 5: Input/output error
> > > FAILED
> > > Attempting to correct errors...
> > > Processing $MFT and $MFTMirr...
> > > Reading $MFT... OK
> > > Reading $MFTMirr... OK
> > > Comparing $MFTMirr to $MFT... OK
> > > Processing of $MFT and $MFTMirr completed successfully.
> > > Setting required flags on partition... OK
> > > Going to empty the journal ($LogFile)... OK
> > > ntfs_attr_pread_i: ntfs_pread failed: Input/output error
> > > Failed to read of MFT, mft=17625 count=1 br=-1: Input/output error
> > > Inode is corrupt (5): Input/output error
> > > Index root attribute missing in directory inode 5: Input/output error
> > > Remount failed: Input/output error
> > >
> > >
> > > If anyone can suggest how I can recover my drive and what is exactly a problem, I'd appreciate it. Thanks
> > Testdisk might be able to help.
>
> What exactly should I be looking for in testdisk? I checked structure, it is ok. Should I do "deeper search"? And what means "Index root attribute missing in directory inode 5"?
The problem you reported was inability to mount a USB stick. Testdisk 
helps you recover from disk/file system corruption.

I suggest you use ddrescue to create an image of the NTFS partition on 
the USB stick and retry ntfsfix against the image. Assuming ntfsfix 
works, you can then mount the image using the loop option.

e.g.  ddrescue /dev/sdx1 ./ntfs.img
        ntfsfix ./ntfs.img
       mkdir ntfs-image
       mount -o loop ./ntfs.img ./ntfs-image

If ntfsfix doesn't work, try using testdisk against the .img file.

Once you've got your files copied to a new stick, don't use the old one.