Re: Transferring the root filesystem to a ramdisk?
From: Bjorn Eikeland (bjorn_at_eikeland.info)
Date: 01/31/04
- Previous message: Cordula's Web: "Transferring the root filesystem to a ramdisk?"
- In reply to: Cordula's Web: "Transferring the root filesystem to a ramdisk?"
- Next in thread: Cordula's Web: "Re: Transferring the root filesystem to a ramdisk?"
- Reply: Cordula's Web: "Re: Transferring the root filesystem to a ramdisk?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: Sat, 31 Jan 2004 15:29:22 +0100 To: cpghost@cordula.ws, "freebsd-multimedia@freebsd.org" <freebsd-multimedia@freebsd.org>
I'm probably in over my head here, but;
chroot should change the root filesystem for you.
(look in the manpages for more details)
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
best of luck!
> Hello,
>
> 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 won't need paging, because there'll be enough ram for
> everything (ramdisk, kernel and userland).
>
> Now the questions are:
>
> * How to "attach" the root filesystem to the ram disk?
>
> Can this be done only through pxe/netboot before the
> kernel starts, or is there some kind of system call
> that can transfer root on a running system?
>
> * How to power off (and on) the hdd (both for ATA and SCSI)?
>
> * Will the power consumption decrease (no hdd) or will
> it increase (more ram)? Anybody measured this before
> with regular diskless machines?
>
> Thanks,
> -cpghost.
>
_______________________________________________
freebsd-multimedia@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia
To unsubscribe, send any mail to
"freebsd-multimedia-unsubscribe@freebsd.org"
_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
- Previous message: Cordula's Web: "Transferring the root filesystem to a ramdisk?"
- In reply to: Cordula's Web: "Transferring the root filesystem to a ramdisk?"
- Next in thread: Cordula's Web: "Re: Transferring the root filesystem to a ramdisk?"
- Reply: Cordula's Web: "Re: Transferring the root filesystem to a ramdisk?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
|
