Date: Sat, 31 Jan 2004 15:26:54 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: "Cordula's Web" <cpghost@cordula.ws> Cc: freebsd-multimedia@freebsd.org Subject: Re: Transferring the root filesystem to a ramdisk? Message-ID: <Pine.BSF.4.21.0401311525520.38031-100000@InterJet.elischer.org> In-Reply-To: <20040131193525.9EA1740823@fw.farid-hajji.net>
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you could mount the replacement root device on '/' alternatively you could make init do the chroot (you have source no? :-) On Sat, 31 Jan 2004, Cordula's Web wrote: > > > > in an attempt to save power on FreeBSD servers, I'm > > > > trying to replace the hdd with a ramdisk. The idea is to: > > > > > > As for powering down the hdd I did find a page for this, > > > but havent had time to play with it yet: > > > http://www.cran.org.uk/bruce/software.php > > > > there is a port "ataidle" that sets teh IDE drive's internal idle > > timeout timer so it will spin down if you dont use it.. > > Yes, thank you. ataidle works like a charm. > > > as for scsi, you can sent it a spin-down command with camcontrol but I > > forget the actual command.. > > (it should be in the scsi .h files) > > # camcontrol stop da0 > # camcontrol start da0 > works for me. > > Now, all I need would be a syscall to switch the kernel's notion > of the root device. > > Or is there a way to umount root, and remount it on the md drive? > > -- > Cordula's Web. http://www.cordula.ws/ > >
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