Date: Thu, 11 Dec 1997 22:51:10 -0800 (PST) From: Tom <tom@sdf.com> To: Harry Aulakh <harry@tesys.com> Cc: Wilko Bulte <wilko@yedi.iaf.nl>, walcaraz@indy3.gstone.com, freebsd-scsi@freebsd.org Subject: Re: RAID on FreeBSD Message-ID: <Pine.BSF.3.95q.971211224830.18844A-100000@misery.sdf.com> In-Reply-To: <3.0.32.19971211155601.0092e580@gw1.tesys.com>
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On Thu, 11 Dec 1997, Harry Aulakh wrote: > > RAID5 arrays of 5 drives is kinda of nice sweet spot. If you go much > >bigger, just use RAID0 over multiple RAID5. > > Please note that dual RAID support (dpt based) is not available under > FreeBSD(there are few other OS's which do support it), as per my > information.. Can someone verify that.. "dual RAID" is probably a misleading term. You can have multiple arrays with the FreeBSD dpt. I you want to stack arrays (ex. stripe multiple RAID5 arrays together), you can easily just use ccd, after all the hard part, RAID5 reliability, is being done by the controller. I believe the dpt support for stacked arrays, and arrays across is all handled in software within the driver anyhow. Tom
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