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    Hi,<br>
    <br>
    in general, programs use stderr (which you see after &lt;err&gt;) to
    output miscellaneous information. You can see here that "dd" is an
    example of this behaviour. While it exited successfully, it also
    wrote non-essential information to its secondary output. You do not
    see stdout (the primary channel) in the log because "dd" doesn't use
    it in this case.<br>
    <br>
    Cheers,<br>
    Ondra<br>
    <br>
    <div class="moz-cite-prefix">On 2.3.2016 17:41, <a class="moz-txt-link-abbreviated" href="mailto:paf1@email.cz">paf1@email.cz</a> wrote:<br>
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    <blockquote cite="mid:56D717BA.2080706@email.cz" type="cite">
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      Hi, next explanation<br>
      VDSM log give me following message<br>
      Is this live checking for storage availability ? If "SUCCESS" 
      then why "&lt;err&gt; " ???<br>
      <br>
      regs.<br>
      Pavel<br>
      <br>
      Thread-233::DEBUG::2016-03-02
      17:31:55,275::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      SUCCESS: &lt;err&gt; = '0+1 records in\n0+1 records out\n346 bytes
      (346 B) copied, 0.00022692 s, 1.5 MB/s\n'; &lt;rc&gt; = 0<br>
      Thread-299::DEBUG::2016-03-02
      17:31:57,870::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      /usr/bin/dd
      if=/rhev/data-center/mnt/glusterSD/localhost:_2KVM12__P4/300e9ac8-3c2f-4703-9bb1-1df2130c7c97/dom_md/metadata

      iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
      Thread-299::DEBUG::2016-03-02
      17:31:57,886::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      SUCCESS: &lt;err&gt; = '0+1 records in\n0+1 records out\n734 bytes
      (734 B) copied, 0.000391403 s, 1.9 MB/s\n'; &lt;rc&gt; = 0<br>
      Thread-209::DEBUG::2016-03-02
      17:31:58,301::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      /usr/bin/dd
      if=/rhev/data-center/mnt/glusterSD/localhost:_1KVM12-BCK/0fcad888-d573-47be-bef3-0bc0b7a99fb7/dom_md/metadata

      iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
      Thread-209::DEBUG::2016-03-02
      17:31:58,318::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      SUCCESS: &lt;err&gt; = '0+1 records in\n0+1 records out\n335 bytes
      (335 B) copied, 0.00048095 s, 697 kB/s\n'; &lt;rc&gt; = 0<br>
      Thread-198::DEBUG::2016-03-02
      17:31:58,885::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
      /usr/bin/dd
      if=/rhev/data-center/mnt/installshare:_DATA3/7f334c9d-ac01-4b2a-9f29-af1d2f24c3e0/dom_md/metadata

      iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
      <br>
       dist = RHEL - 7 - 2.1511<br>
      kernel = 3.10.0 - 327.10.1.el7.x86_64<br>
      KVM = 2.3.0 - 29.1.el7<br>
      libvirt = libvirt-1.2.17-13.el7_2.3<br>
      vdsm = vdsm-4.16.30-0.el7<br>
      GlusterFS = glusterfs-3.7.8-1.el7<br>
      <br>
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      <br>
      <pre wrap="">_______________________________________________
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