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Date:      Fri, 09 Oct 1998 08:37:20 +0200
From:      Marius Bendiksen <Marius.Bendiksen@scancall.no>
To:        "David E. Cross" <crossd@void.cs.rpi.edu>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: CDROM as system disk
Message-ID:  <3.0.5.32.19981009083720.00929a20@mail.scancall.no>
In-Reply-To: <Pine.SGI.4.04.9810081555490.1189-100000@void.cs.rpi.edu>
References:  <199810081905.MAA26707@usr08.primenet.com>

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>Slight problem, disk caching. If you are going to ping the drive every N
>time units as a 'keep-alive', those blocks will very quickly get cached;
>unless you devise some clever algorithm that will always ensure that you
>get a block not in the cache (consider the cache could me a megabyte or
>more in size, and this gets tricky)

So, we'll need some function to flush the cache, or do uncached i/o...
---
Marius Bendiksen, IT-Trainee, ScanCall AS

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