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> Here at Basser we have a mixture of machines running the old
> and new versions of Plan 9.  We would like to get rid of the old
> version.  However, one of these machines is a fileserver, with
> attached jukebox, containing valuable files.  Is it safe to just install
> a new file server kernel on it?  I am guessing that the disk filesystem
> format hasn't changed; is this a safe assumption to make?

> Note for those not in the know: the 9P protocol has changed in the
> second edition, due to changes in the way that Plan 9 does its
> authentication.  Writing a "protocol convertor" looks infeasible,
> unless you only want to log in as user "none".  Not all files on the old
> system are publically readable, and neither should they be.  Currently
> we have one CPU server still on the old system, allowing us to use ftpfs
> to access the old files.  But this is quite clumsy, hence my desire
> to just run the new system with the old files.

> So...  Can it be done?

the disk format is the same. there should be no problem
running the new FS code on the old disk.

ken