Easiest way to corrupt ext3 file system (for testing)?

Question

I need to corrupt ext3 file system (for testing purposes) to some repairable state. How that can be done?

How repairable do you want it? All data recoverable, or just back to a functional filesystem? — DerfK, Feb 01 '11 at 13:53
Also see the other answers on http://stackoverflow.com/questions/140253/how-can-i-simulate-ext3-filesystem-corruption . — Anon, Dec 10 '16 at 07:46

alvosu · Accepted Answer · 2011-02-01T13:22:15.867

2

'mkswap /dev/ext3_dev' or 'dd if=/dev/zerro of=/dev/ext3_dev bs=1024 skip=1000 count=300'

edited Feb 01 '11 at 13:22

answered Feb 01 '11 at 13:00

alvosu

score 0 · Answer 2 · answered Feb 01 '11 at 12:41

0

Well, create ext3 on lvm and shrink lvm, mkfs.ext3 without umounting, some lowlevel tool to delete inodes...

answered Feb 01 '11 at 12:41

Ency

score 0 · Answer 3 · answered Feb 01 '11 at 13:09

0

I'd write simple C-program for that doing a number of random seeks & destroy.

answered Feb 01 '11 at 13:09

poige

score 0 · Answer 4 · answered Feb 01 '11 at 14:31

0

How about just 'fsck' the filesystem while it is mounted, and you are writing some thing to it. This should work pretty consistently.

answered Feb 01 '11 at 14:31

slashdot

4 Answers4