>> I think what I meant was: isn't this going to be useless in a couple
>> of years (if, say, btrfs will be available)? Or it actually gives
>> something that FS will never be able to give?
>
> Yes, it will help you find/address bugs in the filesystem. These things
> are not unheard of...
It sounds to me like a huge job to fix some issues "not unheard of"...
My point is: if we are trying to fix misbehaving drives/controllers
(something that is more common than one might think), that's already
done by ZFS on Solaris and FreeBSD, and will be done in btrfs for linux.
I understand not trusting drives/controllers; but not trusting a
filesystem...
What am I missing? (I'm far from being an expert... I just don't
understand...)