Brian Candler wrote: >On Wed, Mar 01, 2006 at 12:05:17AM -0500, Mikhail T. wrote: > > >>I installed a new 500Gb SATA drive into my 6.1 system and am greatly >>disappointed with its performance. Although straight reading is >>Ok at around 32Mb/s, the writing is never more than 7Mb/s (as reported >>by `systat 1 -vm' while running `cat < /dev/zero > /dev/ad8'). >> >>I reported this a few months ago (running 6.0 then), and one of the >>suggestions was, the drive is bad. Well, I'm seeing the same with its >>replacement... >> >>Also, KNOPPIX-4.0.2 can write to the drive at 22Mb/s (using dd). >> >> I believe that linux uses bufferring in their 'raw' disks so that you may be actually doing larger reads and writes than you know.. (of course my knowledge of Linux is a bit old so they may have changed that) > >Just to be clear: this is Knoppix running on the *same* machine as you've >been testing FreeBSD? (In other words, you've not unplugged the drive and >plugged it into a different PC or controller?) > >Aside: why are you using cat under FreeBSD, but dd under Knoppix? I'd use dd >everywhere for consistency. > >Regards, > >Brian. >_______________________________________________ >freebsd-current_at_freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-current >To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > >Received on Wed Mar 01 2006 - 18:03:07 UTC
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