Date: Sat, 17 Oct 1998 12:23:04 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: peter@taronga.com (Peter da Silva) Cc: scsi@FreeBSD.ORG Subject: Re: filesystem safety and SCSI disk write caching Message-ID: <199810171023.MAA01923@yedi.iaf.nl> In-Reply-To: <199810161632.LAA10179@bonkers.taronga.com> from Peter da Silva at "Oct 16, 98 11:32:57 am"
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As Peter da Silva wrote... > In article <199810141501.JAA04936@mt.sri.com>, > Nate Williams <nate@mt.sri.com> wrote: > >IMO, CAM should disable write caching by default, and allow people to > >add it back by hand if they know how. I don't know how this would be > >done, but it's *ALWAYS* a better idea to be safe than to be sorry. > > This seems like a no-brainer to me. > > Does write-caching actually improve performance measurably? I would have > assumed that FreeBSD would do a better job than any drive could, and it > certainly has more resources available. Write-caching always seemed to be > one of those Windows-oriented optimizations that were better avoided with > real operating systems... unless the write-cache is something like the > 128MB battery-backed cache in our Storageworks RAID box down the hall > from me. Your Storageworks box uses it's cache for more than just caching. What type of HSZ controller does it have BTW? Wilko _ ______________________________________________________________________ | / o / / _ Bulte email: wilko@yedi.iaf.nl |/|/ / / /( (_) Arnhem, The Netherlands WWW : http://www.tcja.nl ______________________________________________ Powered by FreeBSD __________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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