Date: Wed, 08 Jul 2009 13:35:18 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: Regarding IO to disk Message-ID: <h3209m$dog$1@ger.gmane.org> In-Reply-To: <995877b70907080042he7aee18m22f9d4a0e4b18bef@mail.gmail.com> References: <995877b70907080042he7aee18m22f9d4a0e4b18bef@mail.gmail.com>
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Jawahar Tadipatri wrote: > Hi Folks,Can anyone please let me know the average/typical time taken for > completing one IO operation (read and write) to disk? > More specifically, time taken for writing a string to a file. Your question is incomplete and cannot be answered correctly. Declared average latency for desktop hard drives (see http://www.seagate.com/docs/pdf/datasheet/disc/ds_barracuda_7200_12.pdf) is about 4 ms. Real performance depends on about a dozen factors. See here: http://www.google.com/search?q=hard+drive+performance for more information.
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