Difference between revisions of "LVM2"
From Knoppix Documentation Wiki
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| − | + | <u>If you use an old Knoppix version you may need to install LVM tools first. Version 5.0.1 and later (at least) already have the packages and dm-mod module loaded, and the following first steps are not necessary.</u> | |
# modprobe dm-mod | # modprobe dm-mod | ||
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# lndir /lib/lvm-200/ /usr/sbin/ | # lndir /lib/lvm-200/ /usr/sbin/ | ||
| + | |||
*To use existing volume groups you have to activate them. | *To use existing volume groups you have to activate them. | ||
| + | ----- | ||
# vgscan | # vgscan | ||
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*To mount a logical volume, first find out what they are called (unless you know already). Use lvs or vgdisplay/lvdisplay for this. | *To mount a logical volume, first find out what they are called (unless you know already). Use lvs or vgdisplay/lvdisplay for this. | ||
| − | + | ----- | |
# lvs | # lvs | ||
| − | + | LV VG Attr LSize Origin Snap% Move Log Copy% | |
| − | + | home vg -wi-ao 2.09G | |
| − | + | var vg -wi-ao 1.32G | |
*In this example, the volume group 'vg' contains two logical volumes, called 'home' and 'var'. To mount the 'home' volume: | *In this example, the volume group 'vg' contains two logical volumes, called 'home' and 'var'. To mount the 'home' volume: | ||
| + | ----- | ||
# mount /dev/vg/home /mnt/tmp | # mount /dev/vg/home /mnt/tmp | ||
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lost+found fuzzy joe mp3 | lost+found fuzzy joe mp3 | ||
| − | + | =The volumes can be accessed with names '''/dev/<vg>/<lv>''' or '''/dev/mapper/vg-lv'''. For example, the file /dev/vg/home is a symbolic link to /dev/mapper/vg-home, and you can use either name to mount it.= | |
Revision as of 21:29, 24 October 2006
If you use an old Knoppix version you may need to install LVM tools first. Version 5.0.1 and later (at least) already have the packages and dm-mod module loaded, and the following first steps are not necessary.
# modprobe dm-mod # apt-get update # apt-get install lvm-common lvm2 If you needed the above steps, remember that the tools are in /lib/lvm-200 but if you don't want to type the complete path, you may link them into /usr/bin. # lndir /lib/lvm-200/ /usr/sbin/
- To use existing volume groups you have to activate them.
# vgscan # vgchange -a y
- To mount a logical volume, first find out what they are called (unless you know already). Use lvs or vgdisplay/lvdisplay for this.
# lvs LV VG Attr LSize Origin Snap% Move Log Copy% home vg -wi-ao 2.09G var vg -wi-ao 1.32G
- In this example, the volume group 'vg' contains two logical volumes, called 'home' and 'var'. To mount the 'home' volume:
# mount /dev/vg/home /mnt/tmp # ls /mnt/tmp lost+found fuzzy joe mp3
