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Solaris™ Operating Environment Boot Camp by Dominic Butler, David Rhodes

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Why Do We Use Filesystems?

We know that we must have at least one filesystem (the root filesystem), but why do we bother with any others? There are a number of reasons for splitting a disk into filesystems and some of them are historical. For example, the System V filesystem type did not scale well, so as the size increased the performance fell. Consequently, it was advantageous to have many smaller filesystems rather than a few bigger ones. Also, a filesystem has a maximum size and a maximum number of files that it can hold (dependent on the filesystem type), and the limits increased as new filesystem types were developed. As long as our disk was small enough, we could choose to have just one large filesystem, or if we had many disks we could ...

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