環境使用vmware的測試環境。
vmware工具下面增加應硬盤操作，簡單操作，所需要的硬盤空間自己加，默認即可。
查看已經增加的新硬盤
fdisk /dev/sdb
(m進行操作)
輸入n，p主分區，化到圓扇區到133,（4G總共522的扇區，每個1G都是133個扇區）
已經給磁盤劃了主分區1，現在操作刪除。（這裏主要測試）
正常操作劃分去（其實和windowns很像，主要是英文介紹。不懂就按M幫助操作即可）
Command (m for help): n 【選擇分區】
Command action
e extended【擴展分區】
p primary partition (1-4)【主分區】
p【選擇扇區類型】
Partition number (1-4): 1【選擇分區號碼】
First cylinder (1-522, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-522, default 522): 133【選擇終止圓柱扇區】
Command (m for help): n
Command action
e extended
p primary partition (1-4)
e
Partition number (1-4): 1
Partition 1 is already defined. Delete it before re-adding it.
Command (m for help): n
Command action
e extended
p primary partition (1-4)
e
Partition number (1-4): 2
First cylinder (134-522, default 134):
Using default value 134
Last cylinder, +cylinders or +size{K,M,G} (134-522, default 522): 266
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (134-266, default 134): 134
Last cylinder, +cylinders or +size{K,M,G} (134-266, default 266): 266
Command (m for help): n
Command action
l logical (5 or over)【選擇邏輯分區】
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (267-522, default 267):
Using default value 267
Last cylinder, +cylinders or +size{K,M,G} (267-522, default 522): 522
Command (m for help): w【寫入分區】
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost dev]#
用mkfs.ext2指令格式化主分區；（或者mkfs.ext4也可以-通用，版本升級）
一共對序號1.5主分區格式化、擴展分區序號2，邏輯分區序號3進行格式化。
[root@localhost dev]# mkdir /tmp/sdb{1,2,3,5} （創建文檔）
[root@localhost dev]# mount /dev/sdb1 /tmp/sdb1 （掛載主分區，以及其他分區）
[root@localhost dev]# mount /dev/sdb2 /tmp/sdb2
mount: you must specify the filesystem type （#這是爲什麼掛載不了，是因爲掛載掛在擴展分區中邏輯分區，擴展分區符號不能加入，系統提示定義你的文件系統類型。）還去網上找點資料補充，說怎麼老是掛載不了上。
[root@localhost dev]# mount /dev/sdb3 /tmp/sdb3/
[root@localhost dev]# mount /dev/sdb5 /tmp/sdb5/
[root@localhost dev]# fdisk -l （使用fdisk指令看分區劃分情況。）
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00039fd9
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 5222 41430016 8e Linux LVM
Disk /dev/sdb: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x59949818
Device Boot Start End Blocks Id System （第二個硬盤分區情況）
/dev/sdb1 1 133 1068291 83 Linux
/dev/sdb2 134 266 1068322+ 5 Extended
/dev/sdb3 267 522 2056320 83 Linux
/dev/sdb5 134 266 1068291 83 Linux
Disk /dev/mapper/VolGroup-LogVol01: 2000 MB, 2000683008 bytes
255 heads, 63 sectors/track, 243 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-LogVol00: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-LogVol04: 8208 MB, 8208252928 bytes
255 heads, 63 sectors/track, 997 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-LogVol03: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-LogVol02: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
[root@localhost dev]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-LogVol00
9.8G 5.5G 3.8G 59% /
tmpfs 495M 80K 495M 1% /dev/shm
/dev/sda1 477M 29M 424M 7% /boot
/dev/mapper/VolGroup-LogVol02
9.8G 713M 8.6G 8% /home
/dev/mapper/VolGroup-LogVol03
9.8G 23M 9.2G 1% /opt
/dev/mapper/VolGroup-LogVol04
7.4G 37M 7.0G 1% /tmp
/dev/sdb1 1.1G 1.3M 974M 1% /tmp/sdb1 （每個分區的磁盤空間大小，和使用情況。）
/dev/sdb3 1.9G 3.0M 1.8G 1% /tmp/sdb3
/dev/sdb5 995M 1.3M 942M 1% /tmp/sdb5
[root@localhost dev]#
（參考幫助：https://blog.csdn.net/fanhuiren888/article/details/79291768）這個大師寫的也很詳細了。可以一起參考