Differences

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--- lvm [2012/01/31 15:50] – [Worked Example on Live System] k2patel
+++ lvm [2020/08/10 02:35] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 But it is important you do it in proper steps.
+==== Steps to create LVM from drive ====
+<code bash>
+pvcreate /dev/xvdf1
+pvdisplay /dev/xvdf1
+vgcreate -s 16M vg0 /dev/xvdf1
+vgdisplay /dev/xvdf
+vgdisplay vg0
+lvcreate -n lv-vol001 vg0
+lvcreate --help
+lvcreate -A n -L 24.5G -n lv-vol001 vg0
+mkfs.ext3 /dev/vg0/lv-vol001
+</code>
+==== Add drive to LVM ====
+<code bash>
+# Rescan the machine if not found.
+echo "- - -" > /sys/class/scsi_host/host0/scan
+# Cont.
+fdisk /dev/xvdk ## Comment "Specify Type 8e by option t"
+mkfs.ext3 /dev/xvdk1
+pvcreate /dev/xvdk1
+vgextend vg0 /dev/xvdk1
+lvextend -L 300G /dev/vg0/lv-vol001
+OR
+lvextend -L+99.91G /dev/vg0/lv-vol001
+OR
+lvextend -l +100%FREE /dev/vg0/lv-vol001
+resize2fs /dev/vg0/lv-vol001
+</code>
 ==== Reducing Size ====
@@ Line 21: / Line 49: @@
 e2fsck -y /dev/mapper/VolGroup00-LogVol02
 lvextend -L+512M /dev/mapper/VolGroup00-LogVol02
+OR
+lvextend -l +100%FREE /dev/mapper/VolGroup00-LogVol02
 resize2fs /dev/mapper/VolGroup00-LogVol02
 mount /opt
@@ Line 28: / Line 58: @@
 <code bash | history>
+#rescan the device
+echo "- - -" > /sys/class/scsi_device/1\:0\:0\:0/device/rescan
+#list devices and confirm you are going to update which drive.
 fdisk -l
-fdisk /dev/sda ## Comment "Specidy Type 8e by option t"
+### Delete and recreate the partition 'make sure start block is the same'
+fdisk /dev/sda ## Comment "Specify Type 8e by option t"
+### Reprobe partition table.
+partprobe -s
 mkfs.ext3 /dev/sda1
 vgextend VolGroup00 /dev/sda1