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--- tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2014/10/08 17:36] – kohofer
+++ tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2020/10/13 16:46] (current) – [VM disk Expansion LVM with XFS/EXT4] kohofer
@@ Line 1: / Line 1: @@
 ====== VM disk Expansion LVM with XFS/EXT4 =======
-<note important>CREATE SNAPSHOT</note>
 Expand the original disk or add a second vdisk from **Infrastructure Client**.\\
-<del>If you want to perform a grow w/o reboot you have to add a second disk.</del>
 If you are on a kernel newer or equal to 2.6.32 then you can issue the command
@@ Line 26: / Line 23: @@
 whereby after scsi_device you need to find the correct scsi device
+or
+  apt-get install scsitools
+  rescan-scsi-bus
+At the end it should list that a new device was found, note down the name/number!
+  echo '1' > /sys/class/scsi_disk/32\:0\:1\:0/device/rescan
+IMPORTANT: Be sure to replace the 32\:0\:1\:0 with the appropriate disk for your purposes.
@@ Line 31: / Line 38: @@
 Create an additional partition on the free space, say you increased the existing disc
 from 8GB to 15GB. The partition type is 8e.
-  cfdisk /dev/sda
+  cfdisk /dev/sda or cfdisk /dev/sdb
+**RESIZE ORIGINAL DISK**
+Resize the already existing partition, e.g. /dev/sda4 to the newly created free partition.
+  cfdisk /dev/sda or cfdisk /dev/sdb
+Now resize the Physical Volume to the new size
+  pvresize /dev/sda4
+extend the logical volume
+  lvextend -l +100%FREE  /dev/data-www-vg/lvol-datawww
+next resize the file system
+  resize2fs -p /dev/data-www-vg/lvol-datawww
+If you get a error:
+<color #ed1c24>GPT PMBR size mismatch (2362232011 != 2516582399) will be corrected by w(rite).</color>
+run this command:
+  parted -l
+and when asked to Fix/Cancel? type **F**
 # for example if the new partition is /dev/sda3
@@ Line 47: / Line 85: @@
 in this example it's **base**
   lvdisplay
+<code>
   --- Logical volume ---
   LV Name                /dev/base/root
@@ Line 103: / Line 143: @@
   Read ahead sectors     0
   Block device           254:3
+</code>
 and we assume the new partition is /dev/sda3
@@ Line 141: / Line 181: @@
 Now resize the filesystem
-  resize2fs -p /dev/base/root # for ext2 on rpm systems and deb systems
+Debian System:
-  resize4fs -p /dev/base/root # for ext4 on rpm systems only!
+  resize2fs -p /dev/base/root
+Centos/Fedora System:
+  resize4fs -p /dev/base/root
 ===== For swap =====
@@ Line 153: / Line 198: @@
 Check if filesystems are ok, and only then release the snapshot
+Fix issue with swap
+  * swapoff: /dev/dm-1: swapoff failed: Cannot allocate memory
+[[https://unix.stackexchange.com/questions/321675/unable-to-swapoff-but-enough-physical-memory-is-available/472012|Swapoff Cannot Allocate Memory]]
+<del>[[https://leizhilong.github.io/blog/2018-11-12-case-study-swapoff-cannot-allocate-memory/|Swapoff Cannot Allocate Memory]]</del>
@@ Line 206: / Line 259: @@
 [[http://www.novell.com/support/kb/doc.php?id=3803380|LVM Volume Group Shows "unknown device"]]
+[[https://www.tutorialspoint.com/unix_commands/pvresize.htm|pvresize - Unix, Linux Command]]
 http://www.linuxhaven.de/dlhp/HOWTO-test/DE-LVM-HOWTO-2.html\\
 http://www.howtogeek.com/howto/40702/how-to-manage-and-use-lvm-logical-volume-management-in-ubuntu/