Date: Wed, 8 Jul 2009 17:32:16 +0530 From: Jawahar Tadipatri <jawa2502@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Regarding IO to disk Message-ID: <995877b70907080502k64c6bf65n448cd91cb7f85d1@mail.gmail.com> In-Reply-To: <h3209m$dog$1@ger.gmane.org> References: <995877b70907080042he7aee18m22f9d4a0e4b18bef@mail.gmail.com> <h3209m$dog$1@ger.gmane.org>
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Thanks for the info Ivan. On Wed, Jul 8, 2009 at 5:05 PM, Ivan Voras <ivoras@freebsd.org> wrote: > 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. > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >
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