Mehmet Erol Sanliturk <m.e.sanlit...@gmail.com> wrote: > For a long time I am thinking to obtain a physically ( not only > software ) based [read-only] FreeBSD edition by re-arranging some > parts of it , but I do not know how to do it ...
> After some years , MFM hard disks abandoned in favor of IDE > ( Integrated Drive Electronics ) hard disks by moving controller > to hard disk and eliminating use of add-on cards with a very > unfortunate design decision as ( a write protect mechanism by > a switch on the hard disks are not implemented ) . At least some IDE drives have write-protect jumpers, which could presumably be replaced with connections to switches. > With respect to my knowledge , no one of the operating systems > has a facility to separate read-only and modifiable parts ... SunOS 4 had a partial solution to this, by rearranging the FS layout so that /usr could be mounted read-only (and often, from a server -- IIRC a single /usr could be shared among multiple diskless clients). They used quite a few symlinks so that things could be found in their accustomed places although actually located elsewhere. The scheme was fairly well described in the SunOS 4 manual set; granted _finding_ a SunOS 4 manual set these days may be a challenge :) _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"