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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!news1.wtn.mci.net!newsfeed.internetmci.com!news.sgi.com!mr.net!uunet!news-in2.uu.net!EU.net!main.Germany.EU.net!fu-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Linux and FreeBSD swap share? Date: 12 Oct 1996 11:04:04 GMT Organization: Private BSD site, Dresden Lines: 62 Message-ID: <53ntv4$8ok@uriah.heep.sax.de> References: <51rlp5$k5k@www.uno.edu> <R.3244BD69.2781E494@freebsd.org> <52jomt$8s@uriah.heep.sax.de> <53h5ed$nvc@newshost.lanl.gov> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E hlu@retro.lanl.gov (Henry Lu) wrote: > : No, it needs to get a BSD disklabel (with a `b' partition) before. > : However, i've once proven that this can be done from inside the > : /etc/rc scripts. > Could You please post your solution here. I missed the previous post. Sorry, i can't. This machine is long since gone. (I once got a disk for my notebook with a pre-installed Linux, and i've played a little with it.) Basically, what you need is (assumes the shared swap is wd0s2 in FreeBSD, i think this corresponds to hda2 in Linux): In FreeBSD's /etc/rc, before the swapon command: echo 'some mystic numbers you gotta find yourself just to change the partition(slice) type to 0xa5' | fdisk wd0 > /dev/null disklabel -w wd0s2 disktab-entry-for-this-slice (This disktab entry defines the `b' and `c' partitions which are identical except that `b' is marked as swap. The offset is 0, and the size is the entire slice size.) In Linux, you needed (in that old version of Linux) something like: Again, fdisk, to change the partition type to Linux Swap. mkswapfile /dev/hda2 <number of blocks> All this is from memory, so it's likely that i'm mistaken. Since i don't follow the Linux development, it's also possible that the procedure there has changed now. I'm pretty sure however that the above should work for FreeBSD. The `mystic numbers' for FreeBSD's fdisk are easy to find: simply run fdisk manually, and change the magic number of that slice to 0xa5. Write down all the input you needed (including plain newlines), and put them into that `echo' statement. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)