the system
# cat /etc/issue Debian GNU/Linux 7 \n \l # uname -r 3.2.0-4-amd64
Install the LVM, the Linux Kernel Device Mapper userspace library and the partition manipulator.
# apt-get install lvm2 dmsetup parted
Prepare physical volume /dev/sdc for use by the LVM.
Remove MBR and partition table ( most of my drives are used )
# dd if=/dev/zero of=/dev/sdc bs=512 count=1
Initialize sdc for use as an LVM Physical Volume.
# pvcreate /dev/sdc Can't open /dev/sdc exclusively. Mounted filesystem? # pvcreate -f /dev/sdc Can't open /dev/sdc exclusively. Mounted filesystem?nope, it's not mounted --not even partitioned ... 5 minutes of looking around ... fakit
# shutdown -r now
...
initialize sdc for use as an LVM Physical Volume.
# pvcreate /dev/sdc Writing physical volume data to disk "/dev/sdc" Physical volume "/dev/sdc" successfully created
View LVM Physical Volumes
# pvdisplay "/dev/sdc" is a new physical volume of "1.82 TiB" --- NEW Physical volume --- PV Name /dev/sdc VG Name PV Size 1.82 TiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID LY8rp6-IxmV-Cd4Z-AalR-ZN45-6cp5-U2iiVM
Create LVM Volume Group 'insigdato'
# vgcreate insigdato /dev/sdc Volume group "insigdato" successfully created
display volume groups and their attributes
# vgdisplay --- Volume group --- VG Name insigdato System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 1.82 TiB PE Size 4.00 MiB Total PE 476932 Alloc PE / Size 0 / 0 Free PE / Size 476932 / 1.82 TiB VG UUID 2j2iVB-ugas-kQyT-5AC1-RcIk-1Lju-sY39Ec
Add LVM logical volume "movies" to the LVM volume group "insigdato"
# lvcreate --name movies --size 150G insigdato Logical volume "movies" created
Add LVM logical volume "mp3" to LVM VG insigdato
# lvcreate --name mp3 --size 50G insigdato
Add LVM logical volume "OS.iso" to LVM VG insigdato
# lvcreate --name OS.iso --size 50G insigdato
Display logical volumes
# lvdisplay
format the mp3 logical volume
# mkfs.ext3 /dev/insigdato/mp3
format the movies LVM logical volume
# mkfs.xfs -f /dev/insigdato/movies
format /dev/insigato/OS.iso
# mkfs.ext4 /dev/insigdato/OS.iso
create mount points, adjust fstab and mount
# mkdir /insigdato # mkdir /insigdato/movies # mkdir /insigdato/OS.iso # mkdir /insigdato/mp3 # echo "/dev/insigdato/movies /insigdato/movies xfs rw,noatime 0 0" >> /etc/fstab # echo "/dev/insigdato/OS.iso /insigdato/OS.iso ext4 rw,noatime 0 0" >> /etc/fstab # echo "/dev/insigdato/mp3 /insigdato/mp3 ext3 rw,noatime 0 0" >> /etc/fstab # for i in `ls /dev/insigdato`;do mount /dev/insigdato/$i /insigdato/$i;done
Check the LVM physical volume
# pvdisplay --- Physical volume --- PV Name /dev/sdc VG Name insigdato PV Size 1.82 TiB / not usable 1.09 MiB Allocatable yes PE Size 4.00 MiB Total PE 476932 Free PE 412932 Allocated PE 64000 PV UUID LY8rp6-IxmV-Cd4Z-AalR-ZN45-6cp5-U2iiVM
hmm, 150GiB for movies? ... need more
extend the movies LVM logical volume
# lvextend -L165G /dev/insigdato/movies Extending logical volume movies to 165.00 GiB Logical volume movies successfully resized
Extend the xfs filesystem used by movies
# xfs_growfs /dev/insigdato/movies
meta-data=/dev/mapper/insigdato-movies isize=256 agcount=16, agsize=2457600 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=39321600, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=19200, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 39321600 to 43253760
while mounted and without affecting its contents ...
LVM introduction notes
