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

 
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