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lvm [2011/06/01 21:00]
lvm [2017/03/23 15:56] (current)
k2patel [Add drive to LVM]
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 But it is important you do it in proper steps. 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
 +==== 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
 +lvextend -L+99.91G /​dev/​vg0/​lv-vol001
 +lvextend -l +100%FREE /​dev/​vg0/​lv-vol001
 +resize2fs /​dev/​vg0/​lv-vol001
 ==== Reducing Size ==== ==== Reducing Size ====
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 e2fsck -y /​dev/​mapper/​VolGroup00-LogVol02 e2fsck -y /​dev/​mapper/​VolGroup00-LogVol02
 lvextend -L+512M /​dev/​mapper/​VolGroup00-LogVol02 lvextend -L+512M /​dev/​mapper/​VolGroup00-LogVol02
 +lvextend -l +100%FREE /​dev/​mapper/​VolGroup00-LogVol02
 resize2fs /​dev/​mapper/​VolGroup00-LogVol02 resize2fs /​dev/​mapper/​VolGroup00-LogVol02
 mount /opt mount /opt
 </​code>​ </​code>​
 +==== Worked Example on Live System ====
 +<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
 +### 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
 +vgdisplay ​
 +lvextend -l+1599 /​dev/​VolGroup00/​LogVol00
 +df -kh
 +lvdisplay ​
 +resize2fs /​dev/​VolGroup00/​LogVol00 ​
 +df -kh
lvm.1306962023.txt.gz ยท Last modified: 2011/06/01 21:00 by k2patel