HFS+, is not supported in BeOS. This means that if you intend to access Macintosh volumes from within BeOS, you should keep a standard Mac partition on your hard drive containing the files you plan to access from BeOS. Either that, or don’t use HFS+ at all.
Apple DID release HFS+ specifications as a Tech Note, but Be doesn’t put much energy into development on the PowerPC side these days…

original post by Anon, converted to new Websidelayout by shacker.