I've had to do fsck on multi-TB filesystems after unclean shutdowns, they can take a long time, but time measured in hours (to a couple days for the larger ones). I suspect that if you are taking months, you have some other bottleneck in place as well.
Posted Dec 3, 2011 0:40 UTC (Sat) by walex (subscriber, #69836)
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An unclean shutdown is usually not that damaged, which can however happen with a particularly bad unclean shutdown (lots of stuff in flight, for example on a wide RAID) or RAM/disk errors. The report I saw was not for a "enterprise" system with battery, ECC and a redundant storage layer.