Date: Wed, 4 Aug 2010 22:13:36 -0400 From: Joshua Boyd <boydjd@jbip.net> To: "Alex V. Petrov" <alexvpetrov@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <AANLkTi=erffjVT6w=5DABe2Zv8EwY8s5TvXE5KSAoa6y@mail.gmail.com> In-Reply-To: <201008042213.31631.alexvpetrov@gmail.com> References: <201008042008.25679.alexvpetrov@gmail.com> <201008042213.31631.alexvpetrov@gmail.com>
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On Wed, Aug 4, 2010 at 10:13 AM, Alex V. Petrov <alexvpetrov@gmail.com>wrote: > interesting results: > > From single-UDF-disk to pool: > $ dd if=petrovs-disk1.iso of=/tank/petrovs-disk1.iso bs=1M > 3545+1 records in > 3545+1 records out > 3718002688 bytes transferred in 438.770195 secs (8473690 bytes/sec) > > From single-UDF-disk to null: > $ dd if=petrovs-disk1.iso of=/dev/null bs=1M > 3545+1 records in > 3545+1 records out > 3718002688 bytes transferred in 83.304575 secs (44631435 bytes/sec) > ------ > Alex V. Petrov > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > What controllers are you using? What's the results of dd if=/dev/ada4 of=/dev/null bs=1M count=100 ? Have you tried switching to the ad driver? Maybe ada is buggy on your hardware. -- Joshua Boyd JBipNet E-mail: boydjd@jbip.net http://www.jbip.net
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