Mirroring an existing logical volume
This video is part of a course titled Linux LVM Fundamentals using Ubuntu 18.04. Here is a link to the course: https://dev9.us/course/linux-lvm-fund...
Video objectives:
Remove unused existing logical volumes
Create a logical volume that uses all available extents on physical volume
Format and mount a logical volume, then create sample data
Convert a linear logical volume with no available extents to a mirrored volume
Convert a mirrored logical volume to a linear logical volume
Create a logical volume with an unused extent for RAID conversion
Commands used:
lvs
lvremove mydata-vg/volume1-lv
lvcreate -l 100%FREE -n volume1-lv mydata-vg /dev/sdb
mkfs.ext4 /dev/mydata-vg/volume1-lv
mount /dev/mydata-vg/volume1-lv /mnt/storage1
dd if=/dev/urandom of=file1 bs=1M count=5
lvconvert -m1 mydata-vg/volume1-lv /dev/sdc
vgdisplay
lvconvert -m1 --type mirror --corelog mydata-vg/volume1-lv /dev/sdc
lsblk -fs
lvconvert -m0 mydata-vg/volume1-lv
lvconvert -m1 --type mirror --mirrorlog disk mydata-vg/volume1-lv
lvconvert -m0 mydata-vg/volume1-lv /dev/sdb
umount /mnt/storage1
lvremove mydata-vg/volume1-lv
pvs
lvcreate -L 1016M -n volume1-lv mydata-vg /dev/sdb
lvconvert -m1 mydata-vg/volume1-lv
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