Disk Formatting mke2fs

Commands: Mke2fs, MKFS.EXT2, MKFS.EXT3, MKFS.EXT4

MKE2FS Common options are:

-B partition sets the size of each data chunk footprint, currently supports 1024, 2048, and 4096 bytes per block

-I set the inode size

-N Sets the number of inode, sometimes using the default inode count, so you have to customize the inode number

-C before formatting the disk to detect whether there is a problem, plus this option will be very slow

-L PRESETS the label of the partition label

-J create EXT3 format partition, if you use MKFS.EXT3, you don't have to add this option.

-T is used to specify what type of file system it can be ext2, ext3, or EXT4

-M format, specifies the percentage of the disk that is reserved to the administrator, and is only for the MKE2FS command

[Email protected] ~]# mke2fs-t EXT4/DEV/SDB5

MKE2FS 1.41.12 (17-may-2010)

File System label =

Operating system: Linux

Block size =4096 (log=2)

Chunked size =4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

66384 inodes, 265056 blocks

13252 blocks (5.00%) reserved for the Super user

First block of data =0

Maximum filesystem blocks=272629760

9 Block groups

32768 blocks per group, 32768 fragments per group

7376 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376

Writing Inode table: complete

Creating Journal (8192 blocks): complete

Writing Superblocks and FileSystem accounting information: Complete

This filesystem'll be automatically checked every mounts or

Whichever comes first. Use Tune2fs-c or-i to override.

Specifies that the file system format is EXT4 and that the command is equivalent to MKFS.EXT4/DEV/SDB5. One of the indicators in the example above is that "block size = 4096" Here involves a "block" concept. When the disk is formatted, the size of each block is pre-defined, and then all of the space is divided into one small block, and the data is stored in a block of the write. Ext File system default block size is 4096 that is 4k. When formatting, you can specify a block size of 1024, 2048, 4096 (which are multiplied). Although you can specify a block size of more than 4096 when you format it, you cannot mount it properly once you have more than 4096.

Specify the block size:

[Email protected] ~]# mke2fs-t ext4-b 8192/DEV/SDB5

Warning:blocksize 8192 not usable in most systems.

MKE2FS 1.41.12 (17-may-2010)

Mke2fs:8192-byte blocks too big for system (max 4096)

Do you want to continue anyway? (y,n) Y //Specify block size of 8192 will prompt, block value setting is too large, we directly input y forced formatting.

Warning:8192-byte blocks too big for system (max 4096), forced to continue

File System label =

Operating system: Linux

Block size =8192 (log=3)

Chunked size =8192 (log=3)

Stride=0 blocks, Stripe width=0 blocks

66336 inodes, 132528 blocks

6626 blocks (5.00%) reserved for the Super user

First block of data =0

Maximum filesystem blocks=150976512

3 Block Groups

65528 blocks per group, 65528 fragments per group

22112 inodes per group

Superblock backups stored on blocks:

65528

Writing Inode table: complete

Creating Journal (4096 blocks): complete

Writing Superblocks and FileSystem accounting information: Complete

This filesystem would be automatically checked every mounts or

Whichever comes first. Use Tune2fs-c or-i to override.

You can use-l to specify a label. The label will be used when the disk is mounted, or it can be written to the configuration file.

[Email protected] ~]# mke2fs-t ext4-l test-b 8192/DEV/SDB5

Command: E2label

This command is used to view or modify the label of a partition

[Email protected] ~]# E2LABEL/DEV/SDB5

TEST

[Email protected] ~]# E2LABEL/DEV/SDB5 TEST123

[Email protected] ~]# E2LABEL/DEV/SDB5

TEST123

Disk Formatting mke2fs