"Most applications do not deal with disks directly, instead storing their data in files in a file system, which protects us from those scoundrel disks. After all, a key task of the file system is to ensure that the file system can always be recovered to a consistent state after an unplanned system crash (for example, a power failure). While a good file system will be able to beat the disks into submission, the required effort can be great and the reduced performance annoying. This article examines [http://queue.acm.org/detail.cfm?id=2367378] the shortcuts that disks take and the hoops that file systems must jump through to get the desired reliability."

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