Linux Disk Management

I. how to fix the primary boot record corruption of Liunx: ddif = devzeroof = devsdabs

I. how to fix the failure of the Master Guide record of Liunx: dd if =/dev/zero of =/dev/sda bs = unit size count = count use this command to destroy the master boot record.

Repair process:

1: Restart

A. saving the CD

B. network saving

2: Enter rescue installed system mode

3. enter the shell mode.

4: chroot/mnt/sysimage

5: grub-install/dev/sda boot records are saved.

II. Disk partitioning

1: enter the command fdisk/dev/sdb to partition the disk/dev/sdb.

Enter the command m to display all commands to the menu

P: Display partition table information

N start partitioning and select the partition type

W. Save the partition information and exit

2: view the disk partition information fdisk-l/dev/sda

3: format the disk and create a file system.

Mkfs. ext4/dev/sdb1 note! Only one partition can be formatted here, and the entire disk cannot be formatted using mkfs. ext4/dev/sdb. In this way, all the partitions will disappear and need to be divided again.

4: the difference between the parted command and the fdisk command is that the maximum partition size of a fdisk is 2 TB, which takes effect after the parted is divided!

5: run the partpreb command after Partitioning. you do not need to restart to read the partition table information again. you can use the partpreb command when restarting the server is prohibited.