Does dm-crypt actually work as a root device?

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Hi there

I've been exclusively using dm-crypt for around 9 months on my Dell laptop
(running FC7) - with a /boot partition and "/" fully encrypted. In the beginning
I also encrypted swap with a static password.

I use suspend-to-disk a lot and it all worked - in principle. However every 3-4
"un-suspends" I'd end up with ext3 errors occurring and file loss. In the end it
was diagnosed back to the encrypted swap (I have a ticket open with Fedora about
all this -  https://bugzilla.redhat.com/show_bug.cgi?id=281691). Once I went
back to unencrypted swap, the problem appeared to disappear.

However, I recently replaced my laptop and so went to FC8 in the same
configuration. It worked well for around 3 weeks but today it totally killed
itself. Once I enter the decrypt password, I just start getting "ata1.0" errors
and eventually a EXT3 error and that's it - game over.

I am 100% sure this isn't hardware-related. During this 8+ month period I have
successfully harrassed Dell into replacing the disk 3 times, the motherboard
once - and of course I've just got an entire new system. And yet these problems
continue.

And yet when I read this list, it appears to be working for others (although
most are using to protect "sub-volumes" like /home).

So does anyone else have any ideas what I am doing wrong? I mean - it works most
of the time - but when an encrypted drive goes bad - it REALLY goes bad :-)

It is obviously related to suspending to disk - but that feature is more
important to me than encryption, so if no-one has any ideas, I'm just going to
go back to non-encrypted - as it's safer.

Thanks for any ideas

Jason


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