Subject: Re: ccd performance
To: Dave Huang <>
From: Brian Hechinger <>
List: current-users
Date: 06/13/1997 18:54:44
Dave Huang drunkenly mumbled...
> I recently made my /usr a ccd (just for fun and 'cuz I think disk striping
> is nifty :) and was wondering how to determine the best interleave
> setting. Is the size of a track still a good guideline to use? My disks
> aren't identical--they're not even the same speed, which is probably
> especially evil.
> One's a 5400rpm Quantum Capella and the other's a 7200rp Quantum Atlas.
> Both are use ZBR (or whatever that thing's called where outer tracks have
> more sectors than the inner ones), but according to the messages when the
> drives are probed, one's got 126 sectors/track and the other's got 115. 

i really don't think this is such a good idea.  these two drives are going
to be constantly fighting each other simply because one can read/write much
faster than the other.  you will only be hurting yourself here.

i don't know ccd, but i do know RAID and the concept of ccd, and what you
are doing is not going to get you very good performance.


** Brian Hechinger ** ** **
"Color is for web wanking.  mono is for writing code.  Gimme a Mono Sun 3 and 
an expresso machine any day :-)"

						-Bob Beck