The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM

In this example, there are 586 free physical extents.
Creating a single logical volume
The lvcreate command is used to create a logical volume. The -l flag specifies to use all
free extents, 586 in this example. The -n homelv specifies the name of the new logical
volume. The last argument homevg specifies the name of the volume group from which the
logical volume will be created.
# lvcreate -l 586 -n homelv homevg
Logical volume "homelv" created
Use the lvdisplay command to verify. The parameter is the full path of the logical volume,
not just the logical volume name:
# lvdisplay /dev/homevg/homelv
--- Logical volume ---
LV Name /dev/homevg/homelv
VG Name homevg
LV UUID BvXj0n-vA8D-yMY0-Ydex-bF2y-Gfeg-1pyr4O
LV Write Access read/write
LV Status available
# open 0
LV Size 2.29 GiB
Current LE 586
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 1024
Block device 253:4
Making a file system from the logical volume
Now you have a logical volume. Create an ext4 file system out of it using the mkfs.ext4
command:
# mkfs.ext4 /dev/homevg/homelv
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=1 blocks, Stripe width=0 blocks
150176 inodes, 600064 blocks
30003 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=616562688
19 block groups
32768 blocks per group, 32768 fragments per group
7904 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 25 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
The file system created from the logical volume is now ready to be mounted.
196 The Virtualization Cookbook for RHEL 6