Re: Transferring the root filesystem to a ramdisk?

From: Cordula's Web (cpghost_at_cordula.ws)
Date: 01/31/04

  • Next message: Chuck Swiger: "Re: where am I supposed to put my rc.firewall?" 
    To: bjorn@eikeland.info
Date: Sat, 31 Jan 2004 19:54:02 +0100 (CET)

    > > in an attempt to save power on FreeBSD servers, I'm
    > > trying to replace the hdd with a ramdisk. The idea is to:
    > >
    > > 1. boot from the hdd (or netboot from an NFS server)
    > > 2. configure a ram disk (md(4))
    > > 3. copy everything that's needed to ram disk
    > > 4. transfer kernel root to ramdisk (*)
    > > 5. turn off the hdd (**)
    > >
    > > (*) is the hairy question.
    > > (**) How can that be done?
    >
    > I'm probably in over my head here, but;
    > chroot should change the root filesystem for you.
    > (look in the manpages for more details)

    Nope, chroot(2) affects only the calling process, not the whole
    system.

    > 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

    ATAidle is great. Just tried it successfully on a 5.2-RELEASE
    with two drives. powering down the inactive drive (not the one
    with swap and root-fs) is possible this way.

    Thanks,
    -cpghost. 

    -- 
Cordula's Web. http://www.cordula.ws/
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  • Next message: Chuck Swiger: "Re: where am I supposed to put my rc.firewall?"