 | | Two common on-disk filesystems have been developed over the years; the original filesystem as invented by Ken Thompson and Dennis Ritchie, and the Berkeley Fast File System, developed by Kirk McKusick, Bill Joy, Sam Leffler, and Robert Fabry. In SVR4, both filesystems are supported: the (slightly modified) original is called the “System V File System,” and the Fast File System is called the “UNIX File System.” Solaris 2.x supports only the Fast File System (“UNIX File System”); support for the “System V File System” has been removed. In this section we will only discuss the Fast File System, since that is by far the more popular of the two. The discussion applies for the most part to the older filesystem as well, although the details are different (generally, the older filesystem is somewhat simpler to implement, but it is also substantially less efficient). | |
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