Re: File System corruption tool

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> For s-ata drives, you can use hdparm to create a bad sector that will
cause an IO error on read. (Write will fix it)

Thanks Ric Wheeler. Just looked into hdparm, it has nice option to
corrupt sectors but I need to manipulate disk-entries also (like
add invalid nlink value in an inode structure etc).

> We have a script that adds corruption to ext2/3/4 filesystems and runs
> e2fsck on it. It definitely could be improved, but it still catches some

Thanks Andreas. I was going the script, liked idea to create file system
image based on random files. It has minimal option as now of. Will look
into fsfuzzer.

> The other major question I have is why you are trying to create a new
> proprietary filesystem?

Sorry, I should have been clearer. I was assigned with a task of creating a
framework to corrupt disk-layout on an existing FreeBSD based closed source
file system. We have e2fsck like integrity checker, but corrupting disk
script
needs to be added. Thanks!


-- 
----
Cheers,
Lakshmipathi.G
FOSS Programmer.
www.giis.co.in

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<div dir=3D"ltr"><div>&gt; For s-ata drives, you can use hdparm to create a=
 bad sector that will cause an IO error on read. (Write will fix it)</div><=
div><br></div><div>Thanks Ric Wheeler. Just looked into hdparm, it has nice=
 option to=A0</div>

<div>corrupt sectors but I need to manipulate disk-entries also (like=A0</d=
iv><div>add invalid nlink value in an inode structure etc).=A0</div><div><b=
r></div><div>&gt; We have a script that adds corruption to ext2/3/4 filesys=
tems and runs=A0</div>

<div>&gt; e2fsck on it. It definitely could be improved, but it still catch=
es some</div><div><br></div><div>Thanks Andreas. I was going the script, li=
ked idea to create file system=A0</div><div>image based on random files. It=
 has minimal option as now of. Will look=A0</div>

<div>into fsfuzzer.</div><div><br></div><div>&gt; The other major question =
I have is why you are trying to create a new</div><div>&gt; proprietary fil=
esystem? =A0</div><div><br></div><div>Sorry, I should have been clearer. I =
was assigned with a task of creating a=A0</div>

<div>framework to corrupt disk-layout on an existing FreeBSD based closed s=
ource</div><div>file system. We have e2fsck like integrity checker, but cor=
rupting disk script=A0</div><div>needs to be added. Thanks!</div><div><br>

</div><div class=3D"gmail_extra"><div><br></div>-- <br>----<br>Cheers,<br>L=
akshmipathi.G<br>FOSS Programmer.<br><a href=3D"http://www.giis.co.in" targ=
et=3D"_blank">www.giis.co.in</a>
</div></div>

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