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    SubjectRe: ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs)
    On 10/24/05 11:41, Alan Cox wrote:
    > On Llu, 2005-10-24 at 09:51 -0400, Luben Tuikov wrote:
    >>controls and how. Understanding how the factory workers use it and what
    >>they expect. Understanding the code (which may not be as easy). Then it
    >>is rewritten so that it can be easily supported and maintained.
    > Very very rarely, because it means down time and supporting two systems
    > at once. Take a look at the australian customs fiasco or the british
    > passport office disaster to see why (actually almost any large
    > government IT project where politics dictated 'write new stuff so I can
    > announce it in parliament').
    > The smart factory update would occur piece by piece. Starting with the
    > most pressing problems (ie fastest ROI) and working to a plan that ends
    > up with the system modular and clean.
    > You don't turn a steel plant off for a software upgrade.

    There was 0 (zero) effective downtime to the factory.

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