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lvm [2012/01/31 15:50] k2patel [Worked Example on Live System] |
lvm [2020/08/10 02:35] (current) |
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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 | ||
+ | </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 ==== | ==== 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 | ||
+ | OR | ||
+ | lvextend -l +100%FREE /dev/mapper/VolGroup00-LogVol02 | ||
resize2fs /dev/mapper/VolGroup00-LogVol02 | resize2fs /dev/mapper/VolGroup00-LogVol02 | ||
mount /opt | mount /opt | ||
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<code bash | history> | <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 -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 | mkfs.ext3 /dev/sda1 | ||
vgextend VolGroup00 /dev/sda1 | vgextend VolGroup00 /dev/sda1 |