Date: Wed, 8 Apr 1998 19:17:44 +0930 From: Greg Lehey <grog@lemis.com> To: Karl Pielorz <kpielorz@tdx.co.uk> Cc: questions@FreeBSD.ORG Subject: Re: CCD's - real concatenation? Message-ID: <19980408191744.31356@freebie.lemis.com> In-Reply-To: <352B461D.9C76F180@tdx.co.uk>; from Karl Pielorz on Wed, Apr 08, 1998 at 10:40:45AM %2B0100 References: <352B4193.8A6E52CA@tdx.co.uk> <19980408190617.06524@freebie.lemis.com> <352B461D.9C76F180@tdx.co.uk>
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On Wed, 8 April 1998 at 10:40:45 +0100, Karl Pielorz wrote: > Greg Lehey wrote: > >> You *should* be able to configure disks this way if you don't >> interleave. I haven't tried it, but I have looked through the source >> code. It looks as if you can even specify interleave > 1 with unequal >> partions, but in this case it truncates all the partitions to the size >> of the smallest, definitely not what you want. > > I'd agree with that - considering it would chop everything down to the > lowest common denominator... ;-) > >> vinum can do partial mirroring and true concatenation of unequal size >> partitions. It can't interleave unequal sized partitions. I consider >> it a bug, not a feature, than CCD should allow this. > > I'll agree with that as well... ;-) > >>> Or whether you can CCD' an allready CCD'd array? >> >> I still think this is a bad idea. > > Yes, your probably right - though it would be a handy way of concatenating > two unequal CCD arrays into one big virtual drive... ;-) You don't need this kind of trick to do that. There are a lot of issues with memory allocation involved with running layers like CCD. For example, you can hang your system running swap on a CCD device. Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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