azure云上面，一般系统盘都很小，空间基本不够使用，所以我们需要附加磁盘，首先在管理界面附加一个SSD磁盘，一般默认的是/dev/sdc目录。

1，先使用fdisk进行磁盘分区，一般直接分成一个区

[root@crm_db_m01 ~]# fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xd788cc0a.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-133544, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-133544, default 133544): 
Using default value 133544

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
   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)

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@crm_db_m01 ~]# 

2，分区后查看实际分好的分区磁盘目录名称

[root@crm_db_m01 ~]# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 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: 0x000c23d3

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3789    30432256   83  Linux
/dev/sda2            3789        3917     1024000   82  Linux swap / Solaris

Disk /dev/sdb: 240.5 GB, 240518168576 bytes
255 heads, 63 sectors/track, 29241 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: 0x40a7f99c

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       29242   234879936   83  Linux

Disk /dev/sdc: 1098.4 GB, 1098437885952 bytes
255 heads, 63 sectors/track, 133544 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: 0xd788cc0a

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      133544  1072692148+  83  Linux

3，使用 mkfs.ext4 命令格式化磁盘成格式化成ext4各式的文件系统。

[root@crm_db_m01 ~]# mkfs.ext4 /dev/sdc1
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
67043328 inodes, 268173037 blocks
13408651 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
8184 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
    102400000, 214990848

Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 27 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@crm_db_m01 ~]# 

4，开始挂载新的分区磁盘到/oracle

[root@crm_db_m01 ~]# mkdir /oracle
[root@crm_db_m01 ~]# mount /dev/sdc1 /oracle
[root@crm_db_m01 ~]# 

5，开机启动挂载配置

需要用uuid的方式挂载，最好先用ulkid获取/dev/sdc1的uuid，然后再设置开机启动挂载配置

 [root@crm_db_m01 ~]# blkid
/dev/sda1: UUID="6d089360-3e14-401d-91d0-378f3fd09332" TYPE="ext4" 
/dev/sdc1: UUID="81796489-70bd-4707-b844-9088f8a1a209" TYPE="ext4" 
[root@crm_db_m01 ~]# 

进行配置/etc/fstab，配置uuid

[root@crm_db_m01 ~]# vim /etc/fstab 
You have new mail in /var/spool/mail/root
[root@crm_db_m01 ~]# more /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Wed Jan 15 04:45:47 2014
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=6d089360-3e14-401d-91d0-378f3fd09332 /                       ext4    defaults        1 1
UUID=81796489-70bd-4707-b844-9088f8a1a209           /oracle                   ext4    defaults        1 2
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
[root@crm_db_m01 ~]#