Regarding IO to disk

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. Thanks a load, Jawahar ___ freebsd-hackers@freebsd.org mailing l

Re: Regarding IO to disk

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

Re: Regarding IO to disk

Thanks for the info Ivan. On Wed, Jul 8, 2009 at 5:05 PM, Ivan Voras 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

Re: Regarding IO to disk

Declared average latency for desktop hard drives (see http://www.seagate.com/docs/pdf/datasheet/disc/ds_barracuda_7200_12.pdf) is latency is average time to wait until data will be below head. it's by average half on single rotation. for 7200 rpm drive it's 120rps so half rotation takes 1/24