Extending a logical volume at LVM
Suppose that we have a volume group named VG-TEST and It contains a logical volume named LV-TEST. After adding new physical disk /dev/sdx , we want to give additional 100G space to the LV-TEST logical volume. Following procedure is applied to the server.
In our linux server we have to create a new partition on the disk /dev/sdx. To do that:
# fdisk /dev/sdx
fdisk utility asks for parameters so that we create a new partition sdx1
To create physical volume
# pvcreate /dev/sdx1
To add physical volume to the volume group VG-TEST
# vgextend VG-TEST /dev/sdx1
To extend the logical volume LV-TEST
# lvextend -L+100G /dev/VG-TEST/LV-TEST
+100G means that we add extra 100G to the logical volume
We extended the logical volume. Now we should give this space server’s ext3 file system to use it.
# ext2online /dev/VG-TEST/LV-TEST
Related posts:
on Red Hat and Centos systems, ext2online is not available. You should use resize2fs:
# resize2fs /dev/VG-TEST/LV-TEST
and that will detect, write and resize the ext3 fs, then check via df.