https://sigtar.com/tags/diagnostic/ Recent content in Diagnostic on sigtar.com Hugo en-nz Wed, 18 Feb 2009 00:00:00 +1300 https://sigtar.com/2009/02/18/zfs-checking-your-zpool-throughput/ Wed, 18 Feb 2009 00:00:00 +1300 https://sigtar.com/2009/02/18/zfs-checking-your-zpool-throughput/ <p>This is quite a good diagnostic for checking your disk throughput. Try copying data to and from your zpool while your running this command on the host&hellip;</p> <p><strong>zpool iostat -v unprotected 2</strong></p> <pre tabindex="0"><code>capacity     operations    bandwidth pool         used  avail   read  write   read  write ----------  -----  -----  -----  -----  -----  ----- unprotected  1.39T   668G     18      7  1.35M   161K c7d0       696G   403M      1      2  55.1K  21.3K c9d0       584G   112G      8      2   631K  69.3K c7d1       141G   555G      8      2   697K  70.0K ----------  -----  -----  -----  -----  -----  ----- </code></pre><p>The above command will keep displaying the above output every 2 seconds (average during that time). I&rsquo;ve used it a few times to ensure that all disks are being used (in write operations) where needed. Of course read op&rsquo;s may not be typically across all disks as it will depend where the data is&hellip;</p>