Difference between revisions of "LVM2"
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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>If you use an old Knoppix version</u> 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 | # modprobe dm-mod | ||
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# apt-get install lvm-common lvm2 | # 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. | + | 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/ | # lndir /lib/lvm-200/ /usr/sbin/ | ||
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# vgchange -a y | # vgchange -a y | ||
| − | *To mount a logical volume | + | *To mount a logical volume first find out what it is called, unless you know already. Use lvs or vgdisplay/lvdisplay for this. |
----- | ----- | ||
# lvs | # lvs | ||
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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. | |
Latest revision as of 19:18, 3 May 2008
- 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 it is 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
- 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.
