Why did SUSE Linux Enterprise use ReiserFS in the first place?
About seven years ago, SUSE needed an enterprise scalable journaled file system, and ReiserFS was the only one available. After arranging for support with NameSys (the Reiser development team) and building internal expertise, ReiserFS was the obvious choice. At that time, ext3 did not yet exist; it did not appear until about four years later. In addition, ext3 has only recently gained key enterprise-level features such as online expansion and scalability, which ReiserFS v3 has had for years.
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