umm, err.. If your machine crashes, ext3 will restore its state
to that which pertained between zero and five seconds before the crash.
With ext2+fsck, things are not as clear. Your data will be restored
to that which pertained from zero to thirty seconds prior to crash.
inodes and superblock to that which pertained from zero to thirty
five seconds before the crash, stuff like that.
A five second window is short enough for you to be confident that
everything you want is still there. With thirty seconds, uncertainty
Yes, it needs to be configurable.
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