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Re: "mount -t ntfs" vs "mount.ntfs" ?

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Le 28/01/2022 à 17:51, David Wright a écrit :
> On Fri 28 Jan 2022 at 11:34:44 (+0100), Yvan Masson wrote:
>>
>> I had to recover a NTFS partition from a broken drive (I used GNU
>> ddrescue with a domain log file generated by partclone), so I now have
>> a file "recovered_partition.img":
>>
>> $ file recovered_partition.img
>> recovered_partition.img: DOS/MBR boot sector, code offset 0x52+2,
>> OEM-ID "NTFS    ", sectors/cluster 8, Media descriptor 0xf8,
>> sectors/track 63, heads 255, hidden sectors 567296, dos < 4.0
>> BootSector (0x80), FAT (1Y bit by descriptor); NTFS, sectors/track 63,
>> sectors 1917202431, $MFT start cluster 786432, $MFTMirror start
>> cluster 2, bytes/RecordSegment 2^(-1*246), clusters/index block 1,
>> serial number 0606854f86854cf02; contains bootstrap BOOTMGR
>>
>> If I use `mount -t ntfs`, it fails:
>>
>> $ sudo mount -t ntfs recovered_partition.img /mnt/
>> Failed to read last sector (1917202430): Argument invalide
>> HINTS: Either the volume is a RAID/LDM but it wasn't setup yet,
>>     or it was not setup correctly (e.g. by not using mdadm --build ...),
>>     or a wrong device is tried to be mounted,
>>     or the partition table is corrupt (partition is smaller than NTFS),
>>     or the NTFS boot sector is corrupt (NTFS size is not valid).
>> Failed to mount '/dev/loop0': Argument invalide
>> The device '/dev/loop0' doesn't seem to have a valid NTFS.
>> Maybe the wrong device is used? Or the whole disk instead of a
>> partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
>>
>> However, it works perfectly with `mount.ntfs`:
>>
>> $ sudo mount.ntfs recovered_partition.img /mnt/sshfs/
>> Metadata kept in Windows cache, refused to mount.
>> Falling back to read-only mount because the NTFS partition is in an
>> unsafe state. Please resume and shutdown Windows fully (no hibernation
>> or fast restarting.)
>> Could not mount read-write, trying read-only
>>
>> Could it be because `mount` uses kernel driver and `mount.ntfs` uses
>> ntfs-3g, and that the latter has better "quality" even for read-only?
>> (Note that this sentence is a complete guess)
> 
> Perhaps it's worth perusing:
> 
> https://superuser.com/questions/139452/kernel-ntfs-driver-vs-ntfs-3g
> https://www.paragon-software.com/us/home/ntfs3-driver-faq/
> 
> I'm not sure what "quality" means here. One would hope that files
> would yield the same contents regardless of which driver is used,
> allowing for whatever your "broken" means, and for the failure to
> shutdown Windows cleanly.
> 
> Cheers,
> David.
> 
Thanks for the links, I missed that NTF3 was already included in the 
kernel I use (from Debian testing). So in my case ntfs3g is able to 
mount a rescued partition, while NTFS3 is not (thanks Andrei for 
confirming what I supposed): this means that in some cases, NTFS3 is not 
as mature as ntfs3g.

Regards,
Yvan

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Thread

"mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-01-28 11:50 +0100
  Re: "mount -t ntfs" vs "mount.ntfs" ? Andrei POPESCU <andreimpopescu@gmail.com> - 2022-01-28 17:50 +0100
  Re: "mount -t ntfs" vs "mount.ntfs" ? David Wright <deblis@lionunicorn.co.uk> - 2022-01-28 18:00 +0100
    Re: "mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-01-31 11:50 +0100
      Re: "mount -t ntfs" vs "mount.ntfs" ? Michael Stone <mstone@debian.org> - 2022-01-31 16:30 +0100
        Re: "mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-01-31 18:00 +0100
      Re: "mount -t ntfs" vs "mount.ntfs" ? Christian Britz <cbritz@t-online.de> - 2022-01-31 18:10 +0100
        Re: "mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-02-01 13:50 +0100
          Re: "mount -t ntfs" vs "mount.ntfs" ? Tixy <tixy@yxit.co.uk> - 2022-02-01 14:30 +0100
            Re: "mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-02-01 18:10 +0100
              Re: "mount -t ntfs" vs "mount.ntfs" ? Tixy <tixy@yxit.co.uk> - 2022-02-01 20:30 +0100
                Re: "mount -t ntfs" vs "mount.ntfs" ? Yvan Masson <yvan@masson-informatique.fr> - 2022-02-02 11:20 +0100
                Re: "mount -t ntfs" vs "mount.ntfs" ? David Wright <deblis@lionunicorn.co.uk> - 2022-02-02 18:10 +0100

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