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HFS has some cruft from pre-Unix implementations. However, this cruft allows you use the filing system on older versions of MocOS. HFS implements swap space as

by xirium 19y ago

HFS has some cruft from pre-Unix implementations. However, this cruft allows you use the filing system on older versions of MocOS. HFS implements swap space as a hidden file. HFS+ implements journalling in same way. If you boot an older version of MocOS then you temporarily lose journalling. This is the behaviour that you'd want. However, some bits are messy, including directory seperators, Unicode file names, file forks and instant indexing of file names.

Kitto 19y ago
Thanks for the explanation.
michaelneale 19y ago
There was talk of ZFS for a while I think? I guess it will be post leopard now.
- wmf 19y ago
  ZFS is an alpha-quality optional add-on in Leopard; I guess most users won't see it until later.
  - manvsmachine 19y ago
    last time I heard, ZFS was going to be supported in the server version first.