First, prepare disk partitions
#fdisk /dev/sdb
#n create three partitions, respectively 1G. Note that when allocating memory + 1G
(Picture repeated three times)
#t change the partition type to 8e
Finally, be sure to enter: "W" to save
II: Preparation physical volume
- pvcreate /dev/sdb1
- pvcreate /dev/sdb2
- pvcreate /dev/sdb3
- pvdisplay / pvs lists the current physical volume
- pvremove / dev / sdb3 not remove the physical volume is not wrong
-
Three: prepare the volume group
- vgcreate vg1 /dev/sdb1 /dev/sdb2 /dev/sdb3
- vgdisplay / vgs volume groups listed
-
Four: Creating a Logical Volume
- lvcreate -L 200M -n lv1 vg1
- lvdisplay lists logical volumes
- Format mkfs.xfs / dev / vg1 / lv1, and mount
- lvremove / dev / vg1 / lv1 not delete the logical volume is not wrong
The / dev / vg1 / lv1 formatted to ext4 format; command: mkfs -t ext4 / dev / vg1 / lv1; otherwise, an error superblock
Five: the logical volume expansion
- lvresize -L 300M / dev / vg1 / lv1 reset the volume size
- e2fsck -f / dev / vg1 / lv1 check for disk errors (ext4 execution)
- resize2fs / dev / vg1 / lv1 update the logical volume information (ext4 execution)
- xfs_growfs / dev / vg1 / lv1 xfs file system needs to be performed
Six: reduced logical volume (xfs is not supported)
- First umount to unmount
- e2fsck -f / dev / vg1 / lv1 check for disk errors (ext4)
- resize2fs / dev / vg1 / lv1 100M update the logical volume information (ext4)
- lvresize -L 100M / dev / vg1 / lv1 reset the volume size
Seven: Extend Volume Group
- fdisk / dev / sdb new / dev / sdb5 (logical partition 8e) 2G same procedure
- Refresh again directory: #partprobe
- pvcreate /dev/sdb4
- vgextend vg1 /dev/sdb4
- lvresize -L 100M /dev/vg1/lv1 重新设置卷大小
