start a screen session and change to root


detect the new drive

lvmdiskscan


take note of old drive vs new drive

OLD: /dev/sda 25G
NEW: /dev/sdc 50G 

* make sure you are not using a db raw drive.


clean yum cache

yum clean all 


look a current  partitioning scheme

parted /dev/sda print

Model: VMware Virtual disk (scsi)
Disk /dev/sda: 32.2GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1075MB  1074MB  primary  xfs          boot
 2      1075MB  27.1GB  26.0GB  primary               lvm


Create partitions on new drive.

  # verify that it has no partitions
  parted /dev/sdc print

  # set the label
  parted /dev/sdc mklabel msdos

  # Create the 1st partion  for /boot  at same start and end
  parted /dev/sdc mkpart primary xfs 1049kB 1075MB

  # set the boot flag on sdc1
  parted /dev/sdc set 1 boot on

  # Create the 2nd partion for lvm , start at end of 1st partion end with -- -0 to get fullsize
  parted /dev/sdc mkpart primary  1075MB -- -0
  
  # set the lvm flag on sdc2 
  parted /dev/sdc set 2 lvm on


verify the 2 new partitions are there and proper 

parted /dev/sdc print

Model: VMware Virtual disk (scsi)
Disk /dev/sdc: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1075MB  1074MB  primary               boot
 2      1075MB  53.7GB  52.6GB  primary               lvm


show where each lvs are mapped  , should all be /dev/sda2 

lvs -o+devices rootvg


verify the devices in /dev/mapper

ls -al /dev/mapper/rootvg-*
ls -al /dev/mapper/rootvg-* | wc   # take note of that number for later


Move Logical Volume to new disk

pvcreate /dev/sdc2
vgextend rootvg /dev/sdc2
vgs rootvg # rootvg size should now be old disk + new disk in size.

pvmove --atomic /dev/sda2 /dev/sdc2
 

verify that all lvs are on /dev/sdc2 only

lvs -o+devices  rootvg

  homelv        rootvg -wi-ao----   5.00g                                                     /dev/sdc2(1)
  optlv         rootvg -wi-ao----   1.00g                                                     /dev/sdc2(1282)
  rootlv        rootvg -wi-ao----   1.00g                                                     /dev/sdc2(1539)
  swaplv        rootvg -wi-ao----   4.00g                                                     /dev/sdc2(1796)
  tmplv         rootvg -wi-ao----   2.00g                                                     /dev/sdc2(2821)
  usrlv         rootvg -wi-ao----   5.00g                                                     /dev/sdc2(3334)
  varloglv      rootvg -wi-ao----   1.50g                                                     /dev/sdc2(4680)
  varlv         rootvg -wi-ao----   2.00g                                                     /dev/sdc2(5065)


Remove old drive from vg

vgreduce rootvg /dev/sda2
pvremove /dev/sda2


Clone /boot

umount /boot
dd if=/dev/sda1 of=/dev/sdc1 bs=512 conv=noerror,sync
mount /boot


verify that boot is now /dev/sdc1

df -h | grep boot  


Install grub on the new disk 

grub2-install /dev/sdc


Sync to make sure everything is done

sync


shutdown and re-order the drives in vmware so that the new drive is the first one