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Cramfs
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==Design== Files on cramfs file systems are [[zlib]]-compressed one [[Page (computer memory)|page]] at a time to allow random read access. The [[metadata]] is not compressed, but is expressed in a terse representation that is more space-efficient than conventional file systems. The file system is intentionally read-only to simplify its design; random write access for compressed files is difficult to implement. cramfs ships with a utility (<code>mkcramfs</code>) to pack files into new cramfs images. File sizes are limited to less than 16MB. Maximum file system size is a little under 272MB. (The last file on the file system must begin before the 256MB block, but can extend past it.)
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