Re: recovering data from a truncated vn-file possible?

From: Joshua Oreman (oremanj_at_webserver.get-linux.org)
Date: 07/06/03

  • Next message: Terry Lambert: "Re: RFC: Change to sys_errlist" 
    Date: Sun, 6 Jul 2003 09:17:54 -0700
To: Terry Lambert <tlambert2@mindspring.com>

    On Sun, Jul 06, 2003 at 09:06:23AM -0700 or thereabouts, Terry Lambert wrote:
    > Josh Brooks wrote:
    > > Long story short, I have a 4gig vn-backed filesystem. The file backing it
    > > is now missing the last 750megs ... I can vnconfig it, but when I fsck it
    > > I see:
    >
    > Probably the first thing you'll want to do is write a small program
    > to open the file and write a zero at the offset of the 750M to make
    > the "device" the right size. Most of the recovery tools, including
    > fsck, go into convulsions if the device size shrinks on them. So the
    > first thing you want to do is change the size back to what it should
    > be.

    He said it used to be 4gigs, so one would have to write a zero at 4gigs.
    Or do this (slower, but it works):
    $ dd if=/dev/zero bs=1m count=750 >> myfile

    -- Josh

    >
    > -- Terry
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  • Next message: Terry Lambert: "Re: RFC: Change to sys_errlist"

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