LVM - Add new disk and extend FS
Rescan for newly added disks without rebooting:
The command will iterate over all found host adapters and trigger a rescan.
>> for host in /sys/class/scsi_host/*; do echo "- - -" | sudo tee $host/scan; ls /dev/sd* ; done
- - -
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb /dev/sdb1 /dev/sdb2 /dev/sdc /dev/sdc1
- - -
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb /dev/sdb1 /dev/sdb2 /dev/sdc /dev/sdc1
- - -
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb /dev/sdb1 /dev/sdb2 /dev/sdc /dev/sdc1 /dev/sdd
- - -
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb /dev/sdb1 /dev/sdb2 /dev/sdc /dev/sdc1 /dev/sdd /dev/sdd1
The output shows when a new drive has been discovered.
LVM add "physical" disk and extend FS
- Make sure there is a Partition Table and a Partition for LVM
fdisk /dev/<disk>
>> create new gpt table: g
>> create new partition: n
>> set type of partition to lvm: t
>> show partition codes: L
>> insert type: <type from L (Linux LVM)>
>> write changes: w
- Expand existing LVM VG
pvcreate /dev/<disk-partition>
vgextend <existing-vg> /dev/<disk-partition>
- Expand existing LVM LV
# find the correct logical volume
lvdisplay | grep Path
# expand found lv
lvresize -l +100%free <lv path>
- Expand the ext4 filesystem on it
resize2fs <lv path>