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Date:      Sun, 18 Jan 2004 19:48:57 -0800
From:      Micheas Herman <micheas@freep.org>
To:        James Long <james_mapson@umpquanet.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Cutting the power without unmounting the filesystem
Message-ID:  <1074484137.21654.7.camel@tux>
In-Reply-To: <20040119033829.GA23114@ns.museum.rain.com>
References:  <007701c3ddaf$8c58f000$8b01010a@nyalaptopen> <002501c3ddc1$47ca4210$8b01010a@nyalaptopen> <20040119033829.GA23114@ns.museum.rain.com>

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On Sun, 2004-01-18 at 19:38, James Long wrote:
> On Sun, Jan 18, 2004 at 01:47:48PM +0100, Rickard Dahlstrand wrote:
> > 
> > I was hoping on a solution that can work on 4.9.
> 
> How about a hardware solution, i.e. a UPS?

Other possible solutions:

Use flash ram cards and a journaling file system. (soft updates may work
but you need to talk to someone that knows about them much better than I
do.)

Use a live cd for everything read only, and use a remote machine for
everything that needs write access.

Hard disks really need to be powered down instead of having their power
yanked. you are asking for a hard crash if you pull power from a drive
that is actively reading or writing.

Having this as regular part of the drives duty is asking for trouble. 

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-- 
Write in TERRY BAUM for Congress on March 2, 2004
http://www.terrybaum.com/



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