LVM basic concepts - drive, physical volume, volume group, logical volumes
- fdisk or parted - create an LVM Linux partition (8e) - can use MANY drives
- physical volume - pvcreate ; see it with pvdisplay and pvs - create physical volumes on devices
- volume group - vgcreate ; see it with vgdisplay and vgs - create ONE volume group from many physical volumes
- logical volume - lvcreate ; see it with lvdisplay and lvs - create logical volumes within a volume group
- file systems on logical volumes - mkfs -t ext4 /dev/mapper/vgname-lvname
http://johnmeister.com/linux/FileSystems/lvm-commands.html
setup LVM on Linux (configuration details from SuSE setup - 2005)
process:
fdisk -l
pvcreate /dev/sd?5
pvdisplay
vgcreate vg199 /dev/sd[c-k]5
vgdisplay
lvcreate -L 303400 vg199
lvdisplay
mkfs -t ext3 /dev/mapper/vg199-lvol0
vi /etc/fstab
- add: /dev/vg199/lvol0 /VG199 ext3 defaults 0 0
mkdir /VG199
mount -a
df -h
from /root:
fdisk -l > fdisk.6sep05
--> cat fdisk.6sep05
Disk /dev/sda: 47 MB, 47185920 bytes
2 heads, 45 sectors/track, 1024 cylinders
Units = cylinders of 90 * 512 = 46080 bytes
Disk /dev/sdb: 47 MB, 47185920 bytes
2 heads, 45 sectors/track, 1024 cylinders
Units = cylinders of 90 * 512 = 46080 bytes
Disk /dev/sdc (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdc3 u 0 36826 35352960 5 Whole disk
/dev/sdc4 u 0 2 1920 f Unknown
/dev/sdc5 u 3 36826 35350080 e Unknown
Disk /dev/sdd (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdd3 u 0 36826 35352960 5 Whole disk
/dev/sdd4 u 0 2 1920 f Unknown
/dev/sdd5 u 3 36826 35350080 e Unknown
Disk /dev/sde (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sde3 u 0 36826 35352960 5 Whole disk
/dev/sde4 u 0 2 1920 f Unknown
/dev/sde5 u 3 36826 35350080 e Unknown
Disk /dev/sdf (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdf3 u 0 36826 35352960 5 Whole disk
/dev/sdf4 u 0 2 1920 f Unknown
/dev/sdf5 u 3 36826 35350080 e Unknown
Disk /dev/sdg (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdg3 u 0 36826 35352960 5 Whole disk
/dev/sdg4 u 0 2 1920 f Unknown
/dev/sdg5 u 3 36826 35350080 e Unknown
Disk /dev/sdh (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdh3 u 0 36826 35352960 5 Whole disk
/dev/sdh4 u 0 2 1920 f Unknown
/dev/sdh5 u 3 36826 35350080 e Unknown
Disk /dev/sdi (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdi3 u 0 36826 35352960 5 Whole disk
/dev/sdi4 u 0 2 1920 f Unknown
/dev/sdi5 u 3 36826 35350080 e Unknown
Disk /dev/sdj (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdj3 u 0 36826 35352960 5 Whole disk
/dev/sdj4 u 0 2 1920 f Unknown
/dev/sdj5 u 3 36826 35350080 e Unknown
Disk /dev/sdk (San disk label): 30 heads, 64 sectors, 36826 cylinders
Units = cylinders of 1920 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdk3 u 0 36826 35352960 5 Whole disk
/dev/sdk4 u 0 2 1920 f Unknown
/dev/sdk5 u 3 36826 35350080 e Unknown
------------------------------------------------
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> pvcreate /dev/sdc5 /dev/sdd5 /dev/sde5 /dev/sdf5 /dev/sdg5 /dev/sdh5 /dev/sdi5 /dev/sdj5 /dev/sdk5
Physical volume "/dev/sdc5" successfully created
Physical volume "/dev/sdd5" successfully created
Physical volume "/dev/sde5" successfully created
Physical volume "/dev/sdf5" successfully created
Physical volume "/dev/sdg5" successfully created
Physical volume "/dev/sdh5" successfully created
Physical volume "/dev/sdi5" successfully created
Physical volume "/dev/sdj5" successfully created
Physical volume "/dev/sdk5" successfully created
------------------------------------------------
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> pvdisplay
--- NEW Physical volume ---
PV Name /dev/sdc5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 5JQ3e8-BYuk-zGGm-dAl9-zc4R-fg4f-vbef9N
--- NEW Physical volume ---
PV Name /dev/sdd5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID FMO1Re-ZWCI-x86f-AWYU-1Ptb-x0et-7y7d34
--- NEW Physical volume ---
PV Name /dev/sde5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID Wz63XN-yLRY-wH83-0jce-2WwN-MHno-kHc4UM
--- NEW Physical volume ---
PV Name /dev/sdf5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID VgjrsQ-MfnV-Buth-6sVG-hnrp-6B25-ljgOJU
--- NEW Physical volume ---
PV Name /dev/sdg5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID haUHuI-zhU2-vdNR-MD3J-pjdy-rQaR-wLJ3vs
--- NEW Physical volume ---
PV Name /dev/sdh5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 8os5zU-DPeG-kTty-WScN-WQWk-dlCC-4t5Fow
--- NEW Physical volume ---
PV Name /dev/sdi5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID TFEMUp-CTGg-1RXJ-WYCY-9Mu5-B5AP-OpA1zu
--- NEW Physical volume ---
PV Name /dev/sdj5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID PnJYGj-qNzD-6lTd-FDx1-IDGD-6smm-ZVRp8m
--- NEW Physical volume ---
PV Name /dev/sdk5
VG Name
PV Size 33.71 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID rjK5kQ-H91T-M3ne-hDYy-aL0u-Pk0i-KPf4u0
------------------------------------------------
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> vgcreate vg199 /dev/sd[c-k]5
Volume group "vg199" successfully created
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> vgdisplay
--- Volume group ---
VG Name vg199
System ID
Format lvm2
Metadata Areas 9
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 9
Act PV 9
VG Size 303.40 GB
PE Size 4.00 MB
Total PE 77670
Alloc PE / Size 0 / 0
Free PE / Size 77670 / 303.40 GB
VG UUID Sm2YQ7-H5yk-k832-eqGs-SfEL-dWOV-DT2NVk
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> lvcreate -L 303400 vg199
Logical volume "lvol0" created
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> lvdisplay
--- Logical volume ---
LV Name /dev/vg199/lvol0
VG Name vg199
LV UUID AiwwiO-DYcZ-Ufv2-NDiA-BbN8-XnVh-843Z51
LV Write Access read/write
LV Status available
# open 0
LV Size 296.29 GB
Current LE 75850
Segments 9
Allocation inherit
Read ahead sectors 0
Block device 253:0
------------------------------------------------
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> mkfs -t ext3 /dev/mapper/vg199-lvol0
mke2fs 1.36 (05-Feb-2005)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
38846464 inodes, 77670400 blocks
3883520 blocks (5.00%) reserved for the super user
First data block=0
2371 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616
Writing inode tables: 1194/2371
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> vi /etc/fstab
add:
#########################################
/dev/vg199/lvol0 /VG199 ext3 defaults 0 0
#########################################
--> mkdir /VG199
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> mount -a
------------------------------------------------
root@linux-srv [/root]
------------------------------------------------
--> df -h
Filesystem Size Used Avail Use% Mounted on
/dev/cciss/c0d0p2 72G 4.4G 64G 7% /
tmpfs 16G 8.0K 16G 1% /dev/shm
/dev/mapper/vg199-lvol0
292G 33M 277G 1% /VG199
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john meister UNIX Systems Administrator
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