How to add a hard disk to a Centos Server

How to add a hard disk to a Centos Server
Linux hard disk recognition:

Sda indicates 1st SCSI hard disks

Hda indicates 1st IDE Hard Disks

1st USB optical drives

You can use the "fdisk-l" command to list the hard disks currently connected to the system.

Steps:

1. Disable the server and add a new hard disk.

2. Start the server and log on as the root user.

3. View hard disk Information

Fdisk-l


Appears:

Disk/dev/sda: 146.1 GB, 146163105792 bytes

255 heads, 63 sectors/track, 17769 cylinders

Units = cylinders of 16065*512 = 8225280 bytes


Device Boot Start End Blocks Id System

/Dev/sda1*1 13 104391 83 Linux

/Dev/sda2 14 5112 40957717 + 83 Linux

/Dev/sda3 5113 5243 1052257 + 82 Linux swap/



Solaris

/Dev/sda4 5244 17769 100615095 5 Extended

/Dev/sda5 5244 17769 100615063 + 83 Linux



Disk/dev/sdb: 291.3 GB, 291331192320 bytes

255 heads, 63 sectors/track, 17769 cylinders

Units = cylinders of 16065*512 = 8225280 bytes

Disk/dev/sdb1: 291.3 GB, 291331192320 bytes



4. Create a New Hard Disk Partition



Fdisk can use the m command to view the internal command of the fdisk command;

A: The command specifies the start partition;

D: Command to delete an existing partition;

L: The command displays the list of partition ID numbers;

M: view the fdisk Command help;

N: Create a New partition;

P: Command to display the partition list;

T: Command to modify the ID number of the partition type;

W: The command is used to modify and save the partition table.

Fdisk/dev/sdb

Command (m for help): n

Command action

E extended // input e to create an extended partition

P primary partition (1-4)

P

Partion number (1-4): 1
Command (m for help): w


Enter n to press enter, then p to press enter, then 1 to press enter, all the way to press enter, and finally enter w to press enter to save.

View: fdisk-l

The/dev/sdb1 partition is displayed.

5. format the partition:

# Mkfs-t ext3-c/dev/sdb1

6. Create/data directory:

Mkdir/data

7. Mount the partition:

Mount/dev/sdb1/data

8. automatic mounting after startup

# Vim/etc/fstab


9. Add the following content in the last line:

/Dev/sdb1/data ext3 defaults 0 0

10. Test

Umount/data/

Mount-a/data

Df-h