Linux disk and file System Management 3 file system

1 File system

1 operating system to manage files and data through the file system, disk or partition needs to create a filesystem before it can be used for the operating system, the process of creating a file system is called a format

2 devices that do not have a file system are called bare devices

3 common file systems are FAT32, NFTS, Ext2, Ext3, XFS, HFS, etc.

The mainstream file system under Windows 4 is ntfs,linux under the mainstream file system for ext2 and Ext3

5 to determine the quality of a file system is mainly: the largest partition size, support the number of files, the length of support file name, day function, file access performance

2 Creating a file system

1 using the command mke2fs-t ext4/dev/sda1 to create the file system

-b Specifies the file system block size (blocks are the smallest unit of file system read-write operations, default is 4096)

-C When building the file system, check block damage

-L Specify Volume label

-j Establish file System log

2 MKFS can also create a file system, relatively simple mke2fs, supporting a relatively small number of parameters

Mkfs.ext4/dev/sda1

Mkfs.ext3/dev/sda1

Mkfs.vfat/dev/sda1

3 DUMPE2FS can be used to view the file system of a partition

Dumpefs/dev/sda1

4th Zhi

1 with log file system with strong stability, in the presence of errors, can be repaired

2 using a file system with a log, a two-phase commit is used, and the file system does the following when disk operations are performed

-The file system writes the specific contents of the transaction to be executed to the log

-File system to operate

-delete the log after successful operation

3 The advantage of doing this is that when there is an accident, we can write the recovery data through the log written previously. But it will lose some performance.

5 E2label to play the label

1 e2label/dev/sda1 Linuxcast, the name of the general default label is uppercase

6 fsck to check and repair the file system

1 fsck/dev/sda1

2 use-y parameter without prompting to directly repair fsck-y/dev/sda1

3 system startup is the disk will be fsck operation

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