Date: Thu, 29 Aug 1996 09:29:26 -0500 (CDT) From: Joe Greco <jgreco@brasil.moneng.mei.com> To: jmb@freefall.freebsd.org (Jonathan M. Bresler) Cc: moos@degnet.baynet.de, questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: [Q]: formula for calculating BPI needed Message-ID: <199608291429.JAA06769@brasil.moneng.mei.com> In-Reply-To: <199608290016.RAA15559@freefall.freebsd.org> from "Jonathan M. Bresler" at Aug 28, 96 05:16:52 pm
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> > since the capacity of a 295 feet-DAT-tape is about 2 GB. > > After scanning the sources of dump for the estmated-tapes-formula, > > i found some strange constants being used there that i do not > > understand and that are not documented nor explained anywhere. > > I want to rewrite the formula for this calculation in > > the dump-sources but i need some informations on this topic. > > no, you dont ;) well maybe you do but others dont want you to :) > the formulas in dump are there for the old 9-track tapes. > just use the newer parameters: B and b. Modifying the manual page to include a description along these lines might be a much better utilization of time... modifying the formulas is silly because it will fail when we move on to another major type of tape technology. Jonathan's suggestion to use B and b is probably right on. ... JG
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