LVM basic -

LVM

SCAN a new disk

ls -l /sys/class/scsi_host/
grep mpt /sys/class/scsi_host/host?/proc_name
fdisk -l
echo "- - -" > /sys/class/scsi_host/host2/scan

OVERVIEW OF DISKS and PARTITIONS

lsblk

Summary of Volume Groups

vgs (Volume Group Status)

Summary of Logical Volumes

lvs (Logical Volume Status)

Volume Group	Logical Volume
vgdisplay vgdisplay vg_gsp_1	lvdisplay lvdisplay vg_gsp_1
vgextend vg_gsp_1 /dev/sdc1 vgreduce vg_gsp_1 /dev/sdc1	lvextend /dev/vg_gg1/lv_root /dev/sdc1 lvextend --size +2G /dev/vg_gsp_1/lv_gpdisk_1 lvreduce /dev/vg_gg1/lv_root /dev/sdc1
vgcreate vg_gsp_1 /dev/sdb1	lvcreate -L 6G -n lv_gpdisk_2 vg_gsp_1 lvcreate -n lv_gpdisk_2 -l 100%FREE vg_gsp_1 lvremove /dev/vg_gsp_1/lv_gspvol_001
	mkfs -t ext4 /dev/vg_gsp_1/lv_gpdisk_1 `mkfs.xfs` `/dev/vg_gsp_1/lv_gpdisk_1` resize2fs /dev/vg_gg1/lv_root

SHRINK VOLUME

umount /gspmount1
resize2fs -p /dev/vg_gsp_1/lv_gspvol_001 1G
e2fsck -f /dev/vg_gsp_1/lv_gspvol_001
resize2fs -p /dev/vg_gsp_1/lv_gspvol_001 1G
lvreduce -L 1G /dev/vg_gsp_1/lv_gspvol_001
mount /dev/vg_gsp_1/lv_gspvol_001 /gspmount1

INCREASE ROOT

vgdisplay vg_rhce
lvdisplay vg_rhce
vgextend vg_rhce /dev/sdc1
lvextend /dev/vg_rhce/lv_root /dev/sdc1
lsblk
df -h
resize2fs /dev/vg_gg1/lv_root or xfs_growfs /dev/vg_gg1/lv_root
df -h