<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Feb 21, 2017 at 6:10 PM, Nir Soffer <span dir="ltr"><<a href="mailto:nsoffer@redhat.com" target="_blank">nsoffer@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="gmail-HOEnZb"><div class="gmail-h5"><span style="color:rgb(34,34,34)">This is caused by active lvs on the remove storage domains that were not</span><br></div></div>
deactivated during the removal. This is a very old known issue.<br>
<br>
You have remove the remove device mapper entries - you can see the devices<br>
using:<br>
<br>
dmsetup status<br>
<br>
Then you can remove the mapping using:<br>
<br>
dmsetup remove device-name<br>
<br>
Once you removed the stale lvs, you will be able to remove the multipath<br>
device and the underlying paths, and lvm will not complain about read errors.<br>
<br>
Nir<br></blockquote><div><br></div><div>OK Nir, thanks for advising. </div><div><br></div><div>So what I run with success on the 2 hosts</div><div> </div><div><div>[root@ovmsrv05 vdsm]# for dev in $(dmsetup status | grep 900b1853--e192--4661--a0f9--7c7c396f6f49 | cut -d ":" -f 1)</div><div>do</div><div> dmsetup remove $dev</div><div>done</div><div>[root@ovmsrv05 vdsm]# </div></div><div><br></div><div>and now I can run</div><div><br></div><div><div>[root@ovmsrv05 vdsm]# multipath -f 3600a0b80002999020000cd3c5501458f</div><div>[root@ovmsrv05 vdsm]# </div></div><div><br></div><div>Also, with related names depending on host,</div><div><br></div><div>previous maps to single devices were for example in ovmsrv05:</div><div><br></div><div><div>3600a0b80002999020000cd3c5501458f dm-4 IBM ,1814 FAStT </div><div>size=2.0T features='2 pg_init_retries 50' hwhandler='1 rdac' wp=rw</div><div>|-+- policy='service-time 0' prio=0 status=enabled</div><div>| |- 0:0:0:2 sdb 8:16 failed undef running</div><div>| `- 1:0:0:2 sdh 8:112 failed undef running</div><div>`-+- policy='service-time 0' prio=0 status=enabled</div><div> |- 0:0:1:2 sdg 8:96 failed undef running</div><div> `- 1:0:1:2 sdn 8:208 failed undef running</div><div><br></div><div>And removal of single path devices:</div></div><div><br></div><div><div>[root@ovmsrv05 root]# for dev in sdb sdh sdg sdn</div><div>do</div><div> echo 1 > /sys/block/${dev}/device/delete</div><div>done</div><div>[root@ovmsrv05 vdsm]# </div></div><div><br></div><div>All clean now... ;-)</div><div><br></div><div>Thanks again,</div><div><br></div><div>Gianluca</div></div></div></div>