Date: Wed, 4 Aug 2010 21:15:22 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Joshua Boyd <boydjd@jbip.net> Cc: "Alex V. Petrov" <alexvpetrov@gmail.com>, freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <20100805041522.GA89331@icarus.home.lan> In-Reply-To: <AANLkTi=erffjVT6w=5DABe2Zv8EwY8s5TvXE5KSAoa6y@mail.gmail.com> References: <201008042008.25679.alexvpetrov@gmail.com> <201008042213.31631.alexvpetrov@gmail.com> <AANLkTi=erffjVT6w=5DABe2Zv8EwY8s5TvXE5KSAoa6y@mail.gmail.com>
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On Wed, Aug 04, 2010 at 10:13:36PM -0400, Joshua Boyd wrote: > 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 ? His problem is with writes, not reads. I strongly doubt his problem is with the controller (Intel ICHxx and ESBxx controllers are heavily tested on FreeBSD, both with and without AHCI, including ahci.ko). -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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