The many faces of fsck
Posted Sep 6, 2007 4:32 UTC (Thu) by jwb
Parent article: The many faces of fsck
This is a great article. I'm glad you mentioned the mysterious WAFL fsck program and ZFS. I think people should approach claims of "always consistent" with extreme skepticism. The existence of WAFL's fsck is little-known because NetApp salesmen swear that it does not exist. The file system is always consistent, therefore you can't possibly need a fsck. That is, until you come in one morning and your filers are fscking themselves, and you call support, and support tells you "oh, that's the fsck, didn't you know about it?"
So when Sun claims that ZFS doesn't need a fsck, one tends toward disbelief. And given that they are 10 years behind NetApp in the file system design division, I bet they have less experience with all the weird modes of failure, too.
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