Date: Mon, 9 Aug 2010 21:07:23 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <201008092107.23819.alexvpetrov@gmail.com> In-Reply-To: <20100805061959.GA92106@icarus.home.lan> References: <201008042008.25679.alexvpetrov@gmail.com> <201008051409.57751.alexvpetrov@gmail.com> <20100805061959.GA92106@icarus.home.lan>
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> Can you please remove use of the zpool entirely (e.g. zpool destroy > tank) and do a write test to each disk itself? E.g.: > > dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000 > dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000 > dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000 > > Thanks. zpool destroy tank At one time 3 dd dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 605.173955 secs (108292830 bytes/sec) dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 759.946393 secs (86237662 bytes/sec) dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000 1000000+0 records in 1000000+0 records out 65536000000 bytes transferred in 605.139062 secs (108299074 bytes/sec) Disks ad4 ad6 ad8 ad10 ad12 da0 da1 KB/t 0,00 16,00 64,00 64,00 64,00 0,00 0,00 tps 0 1 1667 1329 1646 0 0 MB/s 0,00 0,02 104 83,04 103 0,00 0,00 %busy 0 0 93 94 93 0 0 ie this problem is not the controller ----- Alex V. Petrov
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