Create Mirroring Volume
2016/09/12 |
Create Mirroring Volume.
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[1] | For example, create a Mirroring Volume with Phisical Volume /dev/sdb1 and /dev/sdc1. |
# create vlume group "vg_mirror" with /dev/sdb1 and /dev/sdc1 root@dlp:~# vgcreate vg_mirror /dev/sdb1 /dev/sdc1 Logical volume "vg_mirror" 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 rZ8OdK-L0Hi-pRbj-l0N3-Wj56-1RaX-kLHleg LV Write Access read/write LV Creation host, time node04.srv.world, 2016-09-14 16:06:11 +0900 LV Status available # open 0 LV Size 50.00 GiB Current LE 3840 Mirrored volumes 2 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:6 |
[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_data /dev/sdc1 Volume group "vg_data" successfully extended # set mirror volume root@dlp:~# lvconvert -m1 /dev/vg_data/lv_data /dev/sdc1
# confirm (complete to sync if Cpy%Sync turns 100) root@dlp:~# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root ubuntu -wi-ao---- 45.62g swap ubuntu -wi-ao---- 3.89g lv_data vg_data rwi-a-r--- 50.00g 1.34 |
[3] | Unset Mirroring Volume. |
# specify -m0 to unset root@dlp:~# lvconvert -m0 /dev/vg_data/lv_data root@dlp:~# lvs -a -o vg_name,name,devices,size VG LV Devices LSize ubuntu root /dev/sda2(996) 45.62g ubuntu swap /dev/sda2(0) 3.89g vg_data lv_data /dev/sdb1(0) 50.00g |