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Date:      Sun, 31 May 1998 09:52:38 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Jake <jake@checker.org>, freebsd-questions@FreeBSD.ORG
Subject:   Re: some ccd questions
Message-ID:  <19980531095238.G16873@freebie.lemis.com>
In-Reply-To: <199805302220.SAA01012@elephants.dyn.ml.org>; from Jake on Sat, May 30, 1998 at 06:20:24PM -0400
References:  <199805302220.SAA01012@elephants.dyn.ml.org>

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On Sat, 30 May 1998 at 18:20:24 -0400, Jake wrote:
> Hi,
> soon as I have the money I want to add a second hard drive
> to my system, identical to the one I have now ( wd caviar AC22500 )
> I'd like to configure part of it using the ccd driver,
> namely my swap and /usr partitions.
> I'm running a pretty recent build of -current.
>
> Here's my plan:
>
> root - wd0s1a	~50 megs
> /var - wd2s1a	~50 megs
> swap - ccd0c ; wd0s1b & wd2s1b	~64 megs each, 128 total
> /usr - ccd1c ; wd0s1e & wd2s1e	~1 gig each, 2 gigs total
>
> the letters might be wrong, I'm just extrapolating from my fstab
> and the man page,  but you get the drift.
>
> wd0s2 and wd2s2 will be fat32 partitions, for win95,
> storage, my ftp site, etc...
>
> Is this nuts? 

No.

>  Can the ccd driver stripe slices together?

Yes.

> all the examples are "ccdconfig ccd0 32 0 /dev/sd2e /dev/sd3e"
> ... no "s1" Since it'll mostly be a random-access oriented workload
> I figured I'd use a large interleave, maybe 65,536.

I don't consider that a large interleave.  It's about normal.

> Should swap be the same?  Should I use the CCDF_SWAP ( 0x01 ) flag
> for swap?

Yes.

I'm working on a replacement for ccd.  Check out
http://www.lemis.com/vinum.html for more details.

Greg
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