How to format a new volume in Linux as ext4 or ext3
In this article i will walk you thru the steps you need to format a new volume as ext4 format and make it available to your Linux box.
We have a volume called /dev/sdg and at the moment it needs formatting.
[root@aodba~]# blkid /dev/sdg
To format the new volume to ext4 file system type we will use mkfs.ext4 utility as root user.
- you need to provide him with the y falg to continue.
- you can choose mkfs.ext2 or mkfs.ext3 as well and as per your needs, the process is the same. (wanna read more about File System Types ? )
[root@aodba~]# mkfs.ext4 /dev/sdg
mke2fs 1.41.12 (17-May-2010)
/dev/sdg is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
3932160 inodes, 15728640 blocks
786432 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
480 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 28 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.Now we can check that our volume thou is no mounted the file system type if ext4
[root@aodba~]# blkid /dev/sdg
/dev/sdg: UUID="d3ab63f7-f7e1-4207-8a6e-7dd925a73346" TYPE="ext4"- Great we can see that now we have the volume formatted with ext4 fs type.
Next we need to mount the new formatted volume to our Linux host
- we are going to mount it on directory /vertica_storage/t1_data_03
[root@aodba~]# mount /dev/sdg /vertica_storage/t1_data_03
[root@aodba~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 29G 7.6G 20G 29% /
tmpfs 48G 0 48G 0% /dev/shm
/dev/sda1 485M 94M 366M 21% /boot
/dev/sdc 1808G 143G 306G 81% /vertica
/dev/sdd 380G 172M 280G 1% /vertica_storage/t0_temp
/dev/sde 2427G 190G 404G 82% /vertica_storage/t1_data
/dev/sdf 1428G 107G 305G 76% /vertica_storage/t1_data_02
/dev/sdg 600G 180M 599G 1% /vertica_storage/t1_data_03Add the new new mount point to /etc/fstab file.
The configuration file /etc/fstab contains the necessary information to automate the process of mounting partitions. In a nutshell, mounting is the process where a raw (physical) partition is prepared for access and assigned a location on the file system tree (or mount point).echo "/dev/sdg /vertica_storage/t1_data_03 ext4 defaults 1 2" /etc/fstab