Find Out Current Disk Size:
fdisk -l /dev/sdb
- Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes
- 255 heads, 63 sectors/track, 364801 cylinders
- Units = cylinders of 16065 * 512 = 8225280 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 512 bytes
- Disk identifier: 0x00000000
- Disk /dev/sdb doesn’t contain a valid partition table
Linux – Create 3TB partition size:
To create a partition start GNU parted as follows:
- # parted /dev/sdb
Output:
- GNU Parted 2.3
- Using /dev/sdb
- Welcome to GNU Parted! Type ‘help’ to view a list of commands.
(parted)
Creates a new GPT disklabel i.e. partition table:
- (parted) mklabel gpt
Sample outputs:
- Warning: The existing disk label on /dev/sdb will be destroyed and all
- data on this disk will be lost. Do you want to continue?
- Yes/No? yes
(parted)
Next, set the default unit to TB, enter:
(parted) unit TB
To create a 3TB partition size, enter:
(parted) mkpart primary 0 0
OR
(parted) mkpart primary 0.00TB 3.00TB
To print the current partitions, enter:
(parted) print
Sample outputs:
- Model: ATA ST33000651AS (scsi)
- Disk /dev/sdb: 3.00TB
- Sector size (logical/physical): 512B/512B
- Partition Table: gpt
- Number Start End Size File system Name Flags
- 1 0.00TB 3.00TB 3.00TB ext4 primary
- Quit and save the changes, enter:
(parted) quit
Sample outputs:
Information: You may need to update /etc/fstab.
Use the mkfs.ext3 or mkfs.ext4 command to format the file system, enter:
# mkfs.ext3 /dev/sdb1
OR
# mkfs.ext4 /dev/sdb1
Sample outputs:
- mkfs.ext4 /dev/sdb1
- mke2fs 1.41.12 (17-May-2010)
- Filesystem label=
- OS type: Linux
- Block size=4096 (log=2)
- Fragment size=4096 (log=2)
- Stride=0 blocks, Stripe width=0 blocks
- 183148544 inodes, 732566272 blocks
- 36628313 blocks (5.00%) reserved for the super user
- First data block=0
- Maximum filesystem blocks=4294967296
- 22357 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, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848, 512000000, 50731776, 644972544 - Writing inode tables: done
- Creating journal (32768 blocks): done
- Writing superblocks and filesystem accounting information: done
- This filesystem will be automatically checked every 31 mounts or
- 180 days, whichever comes first. Use tune2fs -c or -i to override.
Type the following commands to mount /dev/sdb1, enter:
- # mkdir /data
- # mount /dev/sdb1 /data
- # df -H
Sample outputs:
| Filesystem | Size | Used | Avail | Use% | Mounted on |
| /dev/sdc1 | 16G | 819M | 14G | 6% | / |
| tmpfs | 1.6G | 0 | 1.6G | 0% | /lib/init/rw |
| udev | 1.6G | 123k | 1.6G | 1% | /dev |
| tmpfs | 1.6G | 0 | 1.6G | 0% | /dev/shm |
| /dev/sdb1 | 3.0T | 211M | 2.9T | 1% | /data |
Make sure you replace /dev/sdb1 with actual RAID or Disk name or Block
Ethernet device such as /dev/etherd/e0.0. Do not forget to update
/etc/fstab, if necessary. Also note that booting from a GPT volume
requires support in your BIOS / firmware. This is not supported on non-EFI
platforms. I suggest you boot server from another disk such as IDE / SATA
/ SSD disk and store data on /data.
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