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<div class="moz-cite-prefix">On 01/09/2020 22:43, Eric Robinson
wrote:<br>
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<p class="MsoNormal">Yannis –<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here’s what I don’t understand. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The backing device is logical volume:
/dev/vg1/lv1<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The drbd volume is: drbd0<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The filesystem is ext4 on /dev/drbd0<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since the filesystem is built on
/dev/drbd0, not on /dev/vg1/lv1, if we remove drbd from the
mix, can we then simply do:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># mount /dev/vg1/lv1 /mnt and find all the
data there? </p>
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<br>
Ideally what you do is something like this lot (untested but looks
reasonable)<br>
<br>
umount it<br>
remove it from /etc/fstab<br>
drbdadm down $resource<br>
drbdadm wipe-md $resource<br>
stop drbd <br>
remove drbd config files <br>
remove drbd from the system<br>
decide whether to extend your filesystem into the extra space that
was previously used by DRBD at the end of /dev/vg1/lv1 or whether to
reduce the size of the LV (assuming internal metadata).<br>
if extending then run resize2fs/xfs_growfs as applicable<br>
if removing extra space then I'll leave it to you to work out how
much you can safely remove without destroying the filesystem!<br>
<br>
DRBD metadata is kept at the end of the block device it occupies so
there is extra space on the end of /dev/vg1/lv1 that is not part of
the filesystem that's on that block device.<br>
<br>
Trevor<br>
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