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--- tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2012/02/14 14:20] – [FOR EXT3/4] kohofer
+++ tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2013/04/12 10:48] – KoHofer@unibz.it
@@ Line 4: / Line 4: @@
 Expand the original disk or add a second vdisk from **Infrastructure Client**.\\
-If you want to perform a grow w/o reboot you have to add a second disk
+If you want to perform a grow w/o reboot you have to add a second disk.
+If you are on a kernel newer or equal to 2.6.32 then you can issue the command
+<code>echo "1" > /sys/block/sdX/device/rescan</code>
+to get the new size w/o reboot.
+In case you cant see the "disk" do this:
+  echo "- - -" > /sys/class/scsi_host/host0/scan
+Do this for all host0,1,2 etc.
+or
+  echo "1" > /sys/class/scsi_device/2\:0\:0\:0/device/rescan
+whereby after scsi_device you need to find the correct scsi device
 **EXPAND ORIGINAL DISK**
@@ Line 15: / Line 37: @@
 # for example if the new partition is /dev/sda3
-# create logical disk /dev/sda3
+# create logical disk /dev/sda3 of type 8e (Linux LVM)
 # make disk visible to linux
@@ Line 113: / Line 135: @@
   lvextend -l +100%FREE /dev/base/root
-Check that the filesystem is ok
+Check that the filesystem is ok, **but only if the FS is unmounted**
   fsck.ext4 -f /dev/base
@@ Line 171: / Line 193: @@
 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/