Messages in this thread | | | Subject | Re: [smartmontools-support]Re: LibPATA code issues / 2.6.16 (previously, 2.6.15.x) | From | Leon Woestenberg <> | Date | Sat, 06 May 2006 17:09:12 +0200 |
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Hi all,
On Fri, 2006-04-21 at 17:05 -0700, Linus Torvalds wrote: > > On Fri, 21 Apr 2006, Jeff Garzik wrote: > > > > > Agreed, though the original poster had already done a 400GB dd from > > /dev/zero... > > Yes, but to a _file_ on the partition (ie he didn't overwrite any existign > data, just the empty parts of a filesystem). > > I realize that it's not enough for the "re-allocate on write" behaviour, > and for that you really _do_ need to re-write the whole disk to get all > the broken blocks reallocated, but my argument was just that we should > make sure to _tell_ people when they are overwriting all their old data ;) > I did not realize this before, and asked badblocks maintainer Theodore if badblocks /some/file was supported (the man page says no); but of course any filesystem can decide to re-allocate blocks for a file.
However, for large files where parts may be bad sectors, I am still searching for a way to read, then re-write every physical sector occupied by the file.
With the purpose to remap the bad sectors inside large MPEG files (where I would rather have a few zeroed holes than a read error in them).
Anyone know such tooling exists? I suspect it has to use filesystem specific IOCTL's to query for the blocks involved.
Regards,
Leon
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