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NTFS-3g on a failing disk 
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Joined: Fri Nov 26, 2010 18:23
Posts: 2
Post NTFS-3g on a failing disk
What does ntfs-3g do when it encounters an IO error at the block layer? Has any thought gone into implementing the methods of DD Rescue into ntfs-3g, so that when its reading from a failed drives, then it tries a reverse read, then a partial read, then a reverse partial read, and so on...

If ntfs-3g supported this, then that would make the data recovery process a bit more streamlined. As it is right now one should make an image of the drive first, then repair the file system, then copy the important files off...


Fri Nov 26, 2010 18:30
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NTFS-3G Lead Developer

Joined: Tue Sep 04, 2007 17:22
Posts: 1286
Post Re: NTFS-3g on a failing disk
Hi,
Quote:
What does ntfs-3g do when it encounters an IO error at the block layer?

It avoids writing any data, tries to restore the latest known situation and issues an error.
Quote:
Has any thought gone into implementing the methods of DD Rescue into ntfs-3g, so that when its reading from a failed drives, then it tries a reverse read, then a partial read, then a reverse partial read, and so on...

ntfs-3g relies on underlying device driver for that, like other file systems.
Quote:
If ntfs-3g supported this, then that would make the data recovery process a bit more streamlined. As it is right now one should make an image of the drive first, then repair the file system, then copy the important files off...

With recent disks, the retries (and migration to spare tracks) are done in the hardware, so when the software knows about it, there is probably no more spare tracks, and it is time for doing a global backup.

Regards

Jean-Pierre


Fri Nov 26, 2010 22:03
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Joined: Fri Nov 26, 2010 18:23
Posts: 2
Post Re: NTFS-3g on a failing disk
Thanks :)


Wed Dec 01, 2010 04:28
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