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From: zeno@serv.net (Sean T. Lamont)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: ccd driver questions
Followup-To: poster
Date: 17 Sep 1996 03:54:43 -0700
Organization: ServNet Internet Services, Seattle, WA
Lines: 23
Message-ID: <51m01j$blk@itchy.serv.net>
NNTP-Posting-Host: itchy.serv.net
I've been messing around with the ccd driver ; I was hoping we could put
together a higher-capacity server with it. However, I have a few concerns.
#1: I build ccd0 on a two-disk system with an interleave of 16. Admittedly,
the disks were of different geometries, but from running a number of
tests, the throughput/latency to /dev/ccd0c was 5%-10% SLOWER than
to either /dev/sd0s1f or /dev/sd1s1f.
#2: We backup using 'dump'. Unless I'm missing something, 'dump' doesn't
work with the ccd device.
Given these results, it seems better to go with intelligently-managed
disks on different mount points, or get a real raid0 controller.
--
Sean T. Lamont, President / Chief NetNerd, Abstract Software, Inc. (ServNet)
- Internet access * WWW hosting * TCP/IP * UNIX * NEXTSTEP * WWW Development -
email: lamont@abstractsoft.com WWW: http://www.serv.net
"...There's no moral, it's just a lot of stuff that happens". - H. Simpson