Date: Sat, 31 Jan 2004 20:35:25 +0100 (CET) From: Cordula's Web <cpghost@cordula.ws> To: julian@elischer.org Cc: freebsd-multimedia@freebsd.org Subject: Re: Transferring the root filesystem to a ramdisk? Message-ID: <20040131193525.9EA1740823@fw.farid-hajji.net> In-Reply-To: <Pine.BSF.4.21.0401310845250.38031-100000@InterJet.elischer.org> (message from Julian Elischer on Sat, 31 Jan 2004 08:47:38 -0800 (PST)) References: <Pine.BSF.4.21.0401310845250.38031-100000@InterJet.elischer.org>
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> > > 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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