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--- tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2009/02/05 15:11] – ccumer
+++ tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2010/04/16 11:27] – kohofer
@@ Line 4: / Line 4: @@
 **THEN TAKE A SNAPSHOT!!!**
-then from on the vm either create an additional partirion on the free space. The partition type us 8e
+then from on the vm either create an additional partition on the free space. The partition type is 8e
 <code>
 cfdisk /dev/sda
-### for example if the new partition is /dev/sda3
+## for example if the new partition is /dev/sda3
+## create logical disk /dev/sda3
+# make disk visible to linux
+partprobe
 pvcreate /dev/sda3
 </code>
-or assign the whole new disk to lvm
+if you are running a newer kernel you can issue this command to male linux re-read the disk geometry:
 <code>
+echo "1" > /sys/class/scsi_device/<device>/device/rescan
+</code>
+or assign the whole new disk to lvm assuming it's /dev/sdb
+<code>
+apt-get install scsitools
+rescan-scsi-bus.sh
 cfdisk /dev/sdb
 ### for example if the new partition is /dev/sda3
@@ Line 18: / Line 28: @@
 </code>
-now you have to extend the volgroup. user ''lvdisplay'' to see which is the name of the group, in this example it's base and we assume the new partition is /dev/sda3
+now you have to extend the volgroup. use ''lvdisplay'' to see which is the name of the group, in this example it's base
+<code>
+lvdisplay
+  --- Logical volume ---
+  LV Name                /dev/base/root
+  VG Name                base
+  LV UUID                8cL9Qd-ksIn-1Ve2-94ym-gTrW-8jet-91tnah
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                5.00 GB
+  Current LE             1280
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:0
+  --- Logical volume ---
+  LV Name                /dev/base/tmp
+  VG Name                base
+  LV UUID                mEnEXY-UtOf-P439-MDpg-BlT3-n8hI-Q6KIfm
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                1.00 GB
+  Current LE             256
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:1
+  --- Logical volume ---
+  LV Name                /dev/base/swap
+  VG Name                base
+  LV UUID                fm2A23-FPb3-itQa-Fvf2-QQmj-giwI-j8FZAf
+  LV Write Access        read/write
+  LV Status              available
+  # open                 2
+  LV Size                2.00 GB
+  Current LE             512
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:2
+  --- Logical volume ---
+  LV Name                /dev/base/data
+  VG Name                base
+  LV UUID                GZKUbb-hZn2-igXN-3dxj-TNz9-1C15-I8u8MR
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                1.52 GB
+  Current LE             389
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:3
+</code> and we assume the new partition is /dev/sda3
 <code>
@@ Line 26: / Line 96: @@
 check with ''pvscan'' if the extend was successfull
-Now we extend the "data" partition to 11.5 GB. See man lvextend for other options
+<code>
+pvscan
+</code>
+Now we extend the "data" partition to 11.5 GB. See man lvextend for other options\\
+.5 G is the NEW total size of the disk we want to extend!
 <code>
-lvextend -L 11.5G  /dev/base/data
+lvextend -L 11.5G  /dev/base/data
+</code>
+Extend with 20G
+<code>
+lvextend -L +20G  /dev/base/data
 </code>
@@ Line 36: / Line 117: @@
 xfs_growfs /data
 </code>
+Check if filesystems are ok, and only then release the snapshot
+For ext2/ext3
+  resize2fs /dev/base/data