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Re: [Full-Disclosure] Reality, humor, and history (was Re: MORE CRITICAL FLAWS IN MS WINDOWS EXPLORER
From: Andrew Farmer (andfarmteknovis.com)
Date: Wed Jan 12 2005 - 13:57:27 CST
On 12 Jan 2005, at 01:36, Valdis.Kletnieksvt.edu wrote:
> (*) My all-time favorite "Close, but no ceee-gar" was the advice
> column for a
> Unix journal where the author *remembered* the old "3 syncs before
> adage - but got it Very Wrong by advising "sync;sync;sync;halt". Bonus
> points if you can remember (a) the *original* reason for the advice
> (b) how this version was Very Wrong (there's *multiple* answers for
> this one ;)
As far as the reason this version was so Very Wrong, the main reason
for syncing three times was the delay introduced by retyping a command
thrice. Typing the whole sequence as a single line wouldn't introduce
any significant delay, making the whole thing useless.
Most modern systems, however, will at least make a best-effort attempt
to push all dirty blocks out to disk on a sync(), as well as on halt.
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