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Full Discussion: Recreating a deleted hardlink to a file if I know the inode number
Special Forums Hardware Filesystems, Disks and Memory Recreating a deleted hardlink to a file if I know the inode number Post 302223686 by Perderabo on Monday 11th of August 2008 06:41:49 AM
Old 08-11-2008
I don't think that you're breaking the rules with a 2 week bump. Hard links are only possible within a file system. You can't can't make a hard link from one file system into another file system. /proc is a separate file system and you can't create links there at all. An extra link in /proc won't help you anyway. Forget /proc. It goes nowhere.

The only tool with a shot at this is fsdb, but I don't know fsdb well enough to tell you the precise steps. Call this plan A. The general steps I would try are:

1 create some file
2 create an extra link to the file with very bizarre name (more easily found and easy to sure you have the right one)
3 hit the power switch to drop power to the box
4 come up in single user mode and run fsdb
5 edit the directory entry to point to my file
6 edit the inodes to increment and decrement the usuage counts
7 run fsck

And I would practice on a test system before I tried it for real.

If I couldn't get it to work, plan B:

1 drop power
2 ship the disk to a data recovery specialist with experts who can implement plan A.
 

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LEARN ABOUT DEBIAN

recover

RECOVER(1)						      General Commands Manual							RECOVER(1)

NAME

       recover - recover a deleted file

SYNOPSIS

	recover [device] [options]

OPTIONS

	-h, --help    prints help
	-a, --all     no filtering; dump all deleted inodes

DESCRIPTION

       recover	recovers  a file which matches some ext2 - info about the deleted inode by getting all the deleted inodes and filtering them. It's
       based upon the Ext2Undeletion-howto by Aaron Crane. Using this utility, your chances to recover a lost file should increase a lot.

QUESTIONS ABOUT THE DELETED FILE

	 o Hard disk device name
	 o Year of deletion
	 o Month of deletion
	 o Weekday of deletion
	 o First/Last possible day of month
	 o Min/Max possible file size
	 o Min/Max possible deletion hour
	 o Min/Max possible deletion minute
	 o User ID of the deleted file
	 o A text string the file included (can be ignored)

BUGS

       Please note that recover does not work with ext3 filesystems, it is strictly ext2-only.	For  further  information  on  this,  please  read
       /usr/share/doc/recover/README.ext2only

WARRANTY

       There is no warranty.

SEE ALSO

	debugfs (8)

AUTHOR

       Tom Pycke (Tom.Pycke@advalvas.be)

WEBSITE

       http://users.linuxbox.com/~recover

								  November 4 1999							RECOVER(1)
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