Nick: stefanct
E-mail: none
Board: resize disk
Contents: 
# Scan for disk size changes (verified by dmesg)
$ echo 1 > /sys/class/scsi_device/2\:0\:0\:0/device/rescan

# change MBR partition table...
# get number of current sectors
$ fdisk -l /dev/sda | head -n1
Disk /dev/sda: 64 GiB, 68719476736 bytes, 134217728 sectors
# get txt representation of current partition table
$ sfdisk -d /dev/sda > partitions.txt
# edit partitions.txt, e.g., extend sda2 and sda5 from 100663296 sectors
$ nano partitions.txt
# from this table:
# /dev/sda1 : start=        2048, size=      497664, type=83, bootable
# /dev/sda2 : start=      501758, size=   100161538, type=5
# /dev/sda5 : start=      501760, size=   100161536, type=8e
# to match 134217728 overall sectors:
# 134217728 - 501758 = 133715970
# /dev/sda1 : start=        2048, size=      497664, type=83, bootable
# /dev/sda2 : start=      501758, size=   133715970, type=5
# /dev/sda5 : start=      501760, size=   133715968, type=8e
# write it back
$ sfdisk /dev/sda < partitions.txt --no-reread

# make kernel aware
$ partprobe /dev/sda

# resize physical LVM volume
$ pvresize /dev/sda5
  Physical volume "/dev/sda5" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized

# resize logical LVM volume
$ lvresize /dev/dm-0 -l +100%FREE
  Size of logical volume dm-0 changed from 46.76 GiB (11971 extents) to 62.76 GiB (16067 extents).
  Logical volume root successfully resized

# resize fs
$ resize2fs /dev/dm-0
resize2fs 1.42.12 (29-Aug-2014)
Filesystem at /dev/dm-0 is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 4
The filesystem on /dev/dm-0 is now 16452608 (4k) blocks long.