Wrong. When the fs is not umounted, you have no _guarantee_ that it is
not corrupted. Consider the case where the runaway process held open
several files. The fs _may_ be consistent, but you can never know at
which point the process got stuck.
Ext2fs is stable enough that this _usually_ doesn't matter. I've had
more than one power outage with the subsequent fsck not finding any
errors. But strictly speaking, the fsck _is_ necessary. (The only way
to avoid it is clearing the dirty flag manually, an action which is
definitely not recommended in any case.)
olaf
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