Date: Thu, 19 Apr 2001 17:09:15 -0600 From: Warner Losh <imp@harmony.village.org> To: Darryl Okahata <darrylo@soco.agilent.com> Cc: freebsd-small@FreeBSD.ORG Subject: Re: The ultimate board! Message-ID: <200104192309.f3JN9F807969@harmony.village.org> In-Reply-To: Your message of "Thu, 19 Apr 2001 15:26:32 PDT." <200104192226.PAA21832@mina.soco.agilent.com> References: <200104192226.PAA21832@mina.soco.agilent.com>
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In message <200104192226.PAA21832@mina.soco.agilent.com> Darryl Okahata writes: : > Based on 10e5 writes per block, 8k blocks and 5M of available space, 1 : > write per second is about 723 days, assuming even wear on each of the : > available blocks (unless I've messed up my calculations). That puts : > it at two years. one write per minute would be 120 years and one : > write per hour would be 7200 years. : : ... but, you can't assume even wear. Don't directory entries, : etc., get written in the same place, over and over? What about : superblocks? The hardware does remapping behind the scenes so that wear is averaged over the set of blocks that change. On a 16M part, there would be about 5M free/changing in the average system, so teh calcuations would hold for that. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message
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