Create Mirroring Volume2023/07/18 |
Create Mirroring Volume.
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[1] | For example, create a Mirroring Volume with Physical Volume [/dev/sdb1] and [/dev/sdc1]. |
# create volume group [vg_mirror] with [/dev/sdb1] and [/dev/sdc1] root@dlp:~# vgcreate vg_mirror /dev/sdb1 /dev/sdc1 Volume group "vg_mirror" successfully created # create mirroring volume root@dlp:~# lvcreate -L 50G -m1 -n lv_mirror vg_mirror Logical volume "lv_mirror" created.root@dlp:~# lvdisplay /dev/vg_mirror/lv_mirror --- Logical volume --- LV Path /dev/vg_mirror/lv_mirror LV Name lv_mirror VG Name vg_mirror LV UUID 7rm2om-Q3X8-41I9-EuB1-ilZg-j11m-71OxyL LV Write Access read/write LV Creation host, time dlp.srv.world, 2023-07-17 20:18:03 -0500 LV Status available # open 0 LV Size 50.00 GiB Current LE 12800 Mirrored volumes 2 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:6 |
[2] | Configure like follows if you'd like to set mirroring volume from a logical volume which is already running. |
# extend volume group root@dlp:~# vgextend vg_dlp /dev/sdc1 Volume group "vg_dlp" successfully extended # set mirror volume root@dlp:~# lvconvert -m1 /dev/vg_dlp/lv_data /dev/sdc1
Are you sure you want to convert linear LV vg_dlp/lv_data to raid1 with 2 images enhancing resilience? [y/n]: y
Logical volume vg_dlp/lv_data successfully converted.
# confirm : complete to sync if Cpy%Sync turns to 100 root@dlp:~# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root debian-vg -wi-ao---- 78.56g swap_1 debian-vg -wi-ao---- 980.00m lv_data vg_dlp rwi-a-r--- 80.00g 12.49 |
[3] | Unset Mirroring Volume. |
# specify -m0 to unset root@dlp:~# lvconvert -m0 /dev/vg_mirror/lv_mirror
Are you sure you want to convert raid1 LV vg_mirror/lv_mirror to type linear losing all resilience? [y/n]: y
Logical volume vg_mirror/lv_mirror successfully converted.
root@dlp:~# lvs -a -o vg_name,name,devices,size VG LV Devices LSize debian-vg root /dev/sda5(0) 78.56g debian-vg swap_1 /dev/sda5(20112) 980.00m vg_mirror lv_mirror /dev/sdb1(1) 50.00g |
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