Difference between revisions of "LVM"
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| − | Logical Volume Management is used to treat seperate disks as one. However, this can cause trouble when trying to access the | + | Logical Volume Management is used to treat seperate disks as one. However, this can cause trouble when trying to access the disks from a recovery CD, etc. |
==Mounting== | ==Mounting== | ||
To mount lvm partitions from a livecd (for purposes of recovery/emergency maintenance), simply: | To mount lvm partitions from a livecd (for purposes of recovery/emergency maintenance), simply: | ||
| − | <code>modprobe dm-mod</code> to load required modules | + | # <code>modprobe dm-mod</code> to load required modules |
| + | # <code>lvm vgchange -ay</code> to become aware of the volume groups | ||
| + | # mount as normal with <code> mount /dev/vg_(machine-name)/(distro-name) /location/to/mount/to</code>. | ||
| + | ==Maintenance== | ||
| + | ===Expand a volume=== | ||
| + | In order to expand a logical volume and its corresponding filesystem: | ||
| + | |||
| + | #lvscan to find out the location (/dev/) of the lvm. | ||
| + | #umount /dev/vg_machine/lv | ||
| + | #lvresize -L +2G /dev/vg_machine/lv | ||
| + | #e2fsck -f /dev/vg_machine/lv | ||
| + | #resize2fs /dev/vg_machine/lv | ||
| + | #reboot | ||
Latest revision as of 18:13, 11 June 2009
Logical Volume Management is used to treat seperate disks as one. However, this can cause trouble when trying to access the disks from a recovery CD, etc.
Mounting
To mount lvm partitions from a livecd (for purposes of recovery/emergency maintenance), simply:
modprobe dm-modto load required moduleslvm vgchange -ayto become aware of the volume groups- mount as normal with
mount /dev/vg_(machine-name)/(distro-name) /location/to/mount/to.
Maintenance
Expand a volume
In order to expand a logical volume and its corresponding filesystem:
- lvscan to find out the location (/dev/) of the lvm.
- umount /dev/vg_machine/lv
- lvresize -L +2G /dev/vg_machine/lv
- e2fsck -f /dev/vg_machine/lv
- resize2fs /dev/vg_machine/lv
- reboot
