Add a new hard disk to Ubuntu in virtualbox

Vitrualbox does not allow you to change the disk size. Therefore, when the hard disk is insufficient, you can only add a new hard disk.

The procedure is as follows:

1. Disable Ubuntu, enable vistualbox, and choose "Settings"> "Storage"> "add virtual hard disk"

2. Start Ubuntu with the following command:
#1 sudo fdisk-l // view the existing system disk space
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Disk/dev/SDA: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Disk identifier: 0x000af383

Device boot start end blocks ID system
/Dev/sda1*1 1244 9992398 + 83 Linux
/Dev/sda2 1245 1305 489982 + 5 extended
/Dev/sda5 1245 1305 489951 82 Linux swap/Solaris

Disk/dev/SDB: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Disk identifier: 0x00000000

Disk/dev/SDB doesn' t contain a valid Partition Table
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The above information shows the Newly Added Disk Space/dev/sdb. here we need to partition the new disk space.
#2 fdisk/dev/SDB
#3 command (M for help): m // enter m to view help information.
The output is as follows:
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Command action
A toggle a bootable flag
B edit BSD disklabel
C toggle the DOS compatibility flag
D delete a partition
L List known partition types
M print this menu
N Add a new partition
O create a new empty DOS partition table
P print the Partition Table
Q quit without saving changes
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
X extra functionality (experts only)
----------------------------------------------------------------------------
#4 command (M for help): n
The output is as follows:
----------------------------------------------------------------------------
Command action
E extended
P primary partition (1-4)
----------------------------------------------------------------------------

Type: P and select add primary partition;
Type: 1 and select the primary Partition Number as 1. In this way, the primary partition created is sdb1;

#5 first cylinder (1-1014, default 1): 1 // Number of disks starting from the first primary Partition
#6 last cylindet or + Siza or + sizem or + sizek: + 1024 MB // It Can Be A number in MB or the number of disk blocks, here, we enter + MB to indicate that the partition size is 1 GB.

In this way, we have created a partition. If you want to create more partitions, you can continue to create the partition according to the above steps.
Finally, type w to save all and exit to complete the partition of the new disk.

4. Format Disk Partitions
#7 sudo mkfs-T ext3/dev/sdb1 // format/dev/sdb1 in ext3 format

5. Mount partitions
#8 sudo mkdir/Data // create a mount point
#9 sudo Mount/dev/sdb1/Data // mount the new disk partition to the/Data Directory
#10 sudo DF // view the mounting result

6. automatic mounting upon startup
#11 VI/etc/fstab // modify the/etc/fstab file
Add the following content to the/etc/fatab file:
/Dev/sdb1/Data ext3 defaults 1 2