From owner-freebsd-hackers  Tue Jan  9 02:53:05 1996
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Date: Tue, 9 Jan 1996 02:52:50 -0800 (PST)
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To: curt@emergent.com
CC: hackers@freebsd.org
Subject: ccd
From: asami@cs.berkeley.edu (Satoshi Asami)
Sender: owner-hackers@freebsd.org
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Sorry, I haven't been reading the hackers list lately.  Chuck told me
people are talking about ccd here.

I have it working on a 2.1 system.  It screams bloody murder, I mean
works pretty well.  We are seeing about 18MB/s read/write with 6 4GB
wide-scsi Barracudas on 2 AHA2940W controllers.  (Those are disks that 
can do 4MB/s write and 7MB/s reads.)

No parity yet, so you can't use it for any important data.  And I have
no idea how in the hell I should define a pseudo-device as a
pseudo-device so it thinks it's an isa device.  It needs a lot of
cleanup before it can actually go in the tree, but if you have a news
spool or something that you want to stripe across disks, this one is
for you.

I will make an "upgrade kit from 2.1R" when I get back from a retreat
this weekend (in which am going to make a presentation of the
measurements on this baby) so people can test it out.

Satoshi