How to Use GPT partition for linux disks larger than 2 TB

In linux, we can convert a large-capacity disk to the GPT format. Because the GPT format disk is equivalent to the 4*16 bytes of the four partition tables originally reserved in the MBR disk, only the first 16 bytes are reserved. Others are similar to extended partitions, the real partition table is 512 bytes later, so there is no limit on four primary partitions for the GPT disk table.

To operate the GPT disk partition table, we need to use the powerful parted command.

Example: Common parted commands

# Parted/dev/sdb
GNU Parted 1.8.1
Using/dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.

(Parted) mklabel gpt
Format the MBR disk as GPT

(Parted) mkpart primary 0 0 100
Divide a primary partition with a starting position of 0 and a size of MB

(Parted) mkpart primary 100 200
Divide a primary partition with a starting position of m and a size of m

(Parted) mkpart primary 0-1

Divide all spaces into one partition

(Parted) print

Print current Partition

(Parted) quit

Some other commands that may be used

(Parted) mklable msdos

If you want to convert the GPT disk into an MBR disk

After partitioning, you must use mkfs. ext3 for formatting.

# Partprobe

# Mkfs. ext3-F/dev/sdb1

In practice:

Take redhat 5 as an example:

Parted/dev/sdb mklabel gpt. Convert to GPT.
Parted/dev/sdb mkpart primary 0 1000000 create 1 TB partition.
Mkfs-t ext3/dev/sdb1
Mount/dev/sdb1/mnt/B
In this way, partition B of A large disk is hung under the mnt directory of the linux system.

Manually mount upon startup

Vi/etc/fstab

/Dev/sdb1/mnt/B auto defaults 0 0