Linux Add new disk expansion space

To add a disk expansion operation:

1. Add a physical disk to the server to restart the server, #fdisk-L View the identification disk (take/DEV/SDB as an example)

[~]# fdisk-l

disk/dev/sda:42.9 GB, 42949672960 bytes

255 heads, Sectors/track, 5221 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk IDENTIFIER:0X0006A7C5


Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 204800 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 287 2097152 Swap/solaris

Partition 2 does not end on cylinder boundary.

/dev/sda3 287 5222 39640064-up Linux


disk/dev/sdb:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000





2. Adding partitions


[~]# Fdisk/dev/sdb

Warning:invalid flag 0x0000 of partition Table 4 would be a corrected by W (rite)


Warning:dos-compatible mode is deprecated. It ' s strongly recommended to

Switch off the mode (command ' C ') 1116.www.qixoo.qixoo.com and change display units to

Sectors (Command ' u ').


Command (M for help): M

Command Action

A toggle a bootable flag

b Edit BSD Disklabel

C Toggle the DOS compatibility flag

D Delete a partition (delete partition)

L list known partition types

M Print this menu

n Add a new partition (new partition)

o Create a new empty DOS partition table

P Print the partition table (display partition information)

Q Quit without saving changes (do not save exit)

s create a new empty Sun Disklabel

t change a partition ' s system ID

U Change display/entry units

V Verify the partition table

W Write table to disk and exit (save exit)

X Extra functionality (experts only)



#用 "n" New partition Select "P" primary partition, where you can create a new three primary partition the rest of the extended partition can be built to select the "E" extended partition


Command (M for help): N

Command Action

E extended (extended partition)

P primary partition (1-4) (primary partition)

1

Invalid partition number for type ' 1 '

Command Action

E Extended

P primary partition (1-4)

P (P is the new primary partition)

Partition number (1-4): 1 (primary partition)

First cylinder (1-2610, default 1):

Using Default value 1

Last cylinder, +cylinders or +size{k,m,g} (1-2610, default 2610): +2g (allocates 2G space to the primary partition)

Command (M for help): P (print out the configured partition information)


disk/dev/sdb:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk Identifier:0xbf76d5e8


Device Boot Start End Blocks Id System

/DEV/SDB1 1 262 2104483+ Linux (allocated partition)




It is generally necessary to build three primary partitions and then the extended partitions that are needed for the remaining space.

Create a new three primary partition and two extended partitions and save exit

Command (M for help): P


disk/dev/sdb:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk Identifier:0xbf76d5e8


Device Boot Start End Blocks Id System

/DEV/SDB1 1 262 2104483+ Linux

/DEV/SDB2 263 524 2104515-up Linux

/DEV/SDB3 525 786 2104515-Up Linux

/DEV/SDB4 787 2610 14651280 5 Extended

/DEV/SDB5 787 918 1060258+-up Linux

/DEV/SDB6 919 1050 1060258+-up Linux


Command (M for help): W

The partition table has been altered!


Calling IOCTL () to re-read partition table.

Syncing disks.



3. Make the partition effective

[~]# partprobe (forcing the kernel to re-locate the partition table)


4. View New partition

[~]# fdisk-l/dev/sdb


disk/dev/sdb:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk Identifier:0xbf76d5e8


Device Boot Start End Blocks Id System

/DEV/SDB1 1 262 2104483+ Linux

/DEV/SDB2 263 524 2104515-up Linux

/DEV/SDB3 525 786 2104515-Up Linux

/DEV/SDB4 787 2610 14651280 5 Extended

/DEV/SDB5 787 918 1060258+-up Linux

/DEV/SDB6 919 1050 1060258+-up Linux



5. Format the partition

[~]# MKFS.EXT3/DEV/SDB1

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

131648 inodes, 526120 blocks

26306 blocks (5.00%) reserved for the Super user

First block of data =0

Maximum filesystem blocks=541065216

Block groups

32768 blocks per group, 32768 fragments per group

7744 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912


Writing Inode table: complete

Creating Journal (16384 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.


[~]# MKFS.EXT3/DEV/SDB2

[~]# MKFS.EXT3/DEV/SDB3

[~]# MKFS.EXT3/DEV/SDB5

[~]# MKFS.EXT3/DEV/SDB6 (the remaining partitions are formatted)




6. New mount directory and mount to system

[~]# mkdir-p/SDB/SDB1

[~]# mkdir-p/SDB/SDB2

[~]# mkdir-p/SDB/SDB3

[~]# mkdir-p/SDB/SDB5

[~]# mkdir-p/SDB/SDB6

[~]# Ls/sdb

SDB1 sdb2 sdb3 SDB5 SDB6

[~]# MOUNT/DEV/SDB1/SDB/SDB1

[~]# MOUNT/DEV/SDB2/SDB/SDB2

[~]# MOUNT/DEV/SDB3/SDB/SDB3

[~]# MOUNT/DEV/SDB5/SDB/SDB5

[~]# MOUNT/DEV/SDB6/SDB/SDB6



7. Modify the configuration file settings to automatically mount the boot

[~]# Vi/etc/fstab

#/etc/fstab

# Created by Anaconda on Fri Oct 14 22:27:19 2016

#

# Accessible filesystems, by reference, is maintained under '/dev/disk '

# See mans Pages Fstab (5), Findfs (8), mount (8) and/or Blkid (8) for more info

#

UUID=BD82CAD1-2B0A-4984-9846-06E690B1FDAD/EXT3 Defaults 1 1

Uuid=6d8f8e24-7849-4ad9-af35-7e8fb71eb7ec/boot ext3 Defaults 1 2

uuid=dc268ee4-ba91-471f-9acf-94d0a2658083 swap swap defaults 0 0

TMPFS/DEV/SHM TMPFS Defaults 0 0

Devpts/dev/pts devpts gid=5,mode=620 0 0

Sysfs/sys Sysfs Defaults 0 0

PROC/PROC proc Defaults 0 0

/DEV/SDB1/SDB/SDB1 ext3 defaults 0 0 (new add Mount option)

/DEV/SDB2/SDB/SDB2 ext3 defaults 0 0 (defaults are 00)

/DEV/SDB3/SDB/SDB3 ext3 defaults 0 0

/DEV/SDB5/SDB/SDB5 ext3 defaults 0 0

/DEV/SDB6/SDB/SDB6 ext3 defaults 0 0



8. Restart the server to take effect and view the partition results

[~]# reboot

[~]# Df-ht

Filesystem Type Size used Avail use% mounted on

/dev/sda3 ext3 38G 7.7G 28G 22%/

Tmpfs tmpfs 495M 0 495M 0%/dev/shm

/DEV/SDA1 ext3 194M 30M 155M 17%/boot

/DEV/SDB1 ext3 2.0G 68M 1.9G 4%/sdb/sdb1

/DEV/SDB2 ext3 2.0G 68M 1.9G 4%/sdb/sdb2

/DEV/SDB3 ext3 2.0G 68M 1.9G 4%/sdb/sdb3

/DEV/SDB5 ext3 1020M 34M 935M 4%/SDB/SDB5

/DEV/SDB6 ext3 1020M 34M 935M 4%/SDB/SDB6


Expansion succeeded.

Note: 1, this is the virtual machine on its own experimental operation, so a disk of space 20G in the real working environment of the expansion of the disk are hundreds of G or even several t;

2, Linux also has a better scalability for the server expansion of the method that is LVM, more flexible operation is also very simple.

Linux Add new disk expansion space