Date: Thu, 29 Mar 2007 01:57:50 -0700 (PDT) From: "R. B. Riddick" <arne_woerner@yahoo.com> To: "Szabó" "Péter" <matyee@mail.alba.hu>, freebsd-geom@freebsd.org Subject: Re: raid3 is slow Message-ID: <707306.40086.qm@web30304.mail.mud.yahoo.com> In-Reply-To: <003301c771de$08d03650$6502a8c0@peteruj>
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--- Szabó Péter <matyee@mail.alba.hu> wrote: > A SATA cable was wrong, and the 5th disk of the raid was not connected. Now > i fix it. > > Geom name: nmivol > State: COMPLETE > OK... :-) > # apply "dd if=/dev/ad%1 of=/dev/null bs=1m count=250 &" 0 1 2 3 4 > 250+0 records out > 262144000 bytes transferred in 4.324466 secs (60618814 bytes/sec) > 250+0 records in > 250+0 records out > 262144000 bytes transferred in 6.289833 secs (41677418 bytes/sec) > 250+0 records in > 250+0 records out > 262144000 bytes transferred in 6.262564 secs (41858894 bytes/sec) > 250+0 records in > 250+0 records out > 262144000 bytes transferred in 7.871292 secs (33303808 bytes/sec) > 250+0 records in > 250+0 records out > 262144000 bytes transferred in 7.857484 secs (33362333 bytes/sec) > Looks good... > I forgot to tell, one label of the raid is a gbde encoded partition. If i do > a read test from the raid, the load seems normal?!?! I don't know how high > is normal. > And why is that? I mean: It doesnt encrypt the data really, because graid3 can still read with a missing disk (consumer)... > # dd if=/dev/raid3/nmivol of=/dev/null bs=1m count=30000 > 30000+0 records in > 30000+0 records out > 31457280000 bytes transferred in 336.545001 secs (93471244 bytes/sec) > Doesnt look much faster than before (86MB/sec or so?)... What happens, when u do not use a gbde device as a consumer? What happens when u try to read from a file system on top of the graid3 device? -Arne ____________________________________________________________________________________ Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html
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