docs/en-US/troublesht-dataloss-on-exp-primary-storage.xml

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<section id="troubleshooting-dataloss-on-exported-primary-storage">
    <title>Data Loss on Exported Primary Storage</title>
    <formalpara>
        <title>Symptom</title>
        <para>Loss of existing data on primary storage which has been exposed as a Linux NFS server export on an iSCSI volume. </para>
    </formalpara>
    <formalpara>
        <title>Cause</title>
        <para>It is possible that a client from outside the intended pool has mounted the storage. When this occurs, the LVM is wiped and all data in the volume is lost</para>
    </formalpara>
    <formalpara>
        <title>Solution</title>
        <para>When setting up LUN exports, restrict the range of IP addresses that are allowed access by specifying a subnet mask. For example:</para>
    </formalpara>
    <programlisting>echo “/export 192.168.1.0/24(rw,async,no_root_squash)” &gt; /etc/exports</programlisting>
    <para>Adjust the above command to suit your deployment needs.</para>
    <formalpara>
        <title>More Information</title>
        <para>See the export procedure in the "Secondary Storage" section of the &PRODUCT; Installation Guide</para>
    </formalpara>
</section>