Linux系统磁盘如何挂载？

[root@qxyw ~]# fdisk -l

Disk /dev/xvda: 42.9 GB, 42949672960 bytes255 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: 0x0008a9a5Device Boot          Start         End      Blocks   Id  System/dev/xvda1               1         523     4194304   82  Linux swap / Solaris
Partition 1 does not end on cylinder boundary./dev/xvda2   *         523        5222    37747712   83  Linux

Disk /dev/xvde: 322.1 GB, 322122547200 bytes255 heads, 63 sectors/track, 39162 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@qxyw ~]# fdisk /dev/xvde
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x590ca8b1.
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): 1First cylinder (1-39162, default 1): 
Using default value 1Last cylinder, +cylinders or +size{K,M,G} (1-39162, default 39162): 
Using default value 39162Command (m for help): p

Disk /dev/xvde: 322.1 GB, 322122547200 bytes255 heads, 63 sectors/track, 39162 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: 0x590ca8b1Device Boot      Start         End      Blocks   Id  System/dev/xvde1               1       39162   314568733+  83  Linux

Command (m for help): w
The partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.

[root@qxyw ~]# mkfs.ext4 xvde1
mke2fs 1.41.12 (17-May-2010)
Could not stat xvde1 --- No such file or directory

The device apparently does not exist; did you specify it correctly?[root@qxyw ~]# mkfs.ext4 /dev/xvde1
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 blocks19660800 inodes, 78642183 blocks3932109 blocks (5.00%) reserved for the super user
First data block=0Maximum filesystem blocks=4294967296
2400 block groups32768 blocks per group, 32768 fragments per group8192 inodes per group
Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 25 mounts or180 days, whichever comes first.  Use tune2fs -c or -i to override.

[root@qxyw home]# mount /dev/xvde1 /home/mysql
[root@qxyw home]# df -h
Filesystem            Size  Used Avail Use% Mounted on/dev/xvda2             36G  2.4G   32G   7% /tmpfs                 3.9G     0  3.9G   0% /dev/shm/dev/xvde1            296G  191M  281G   1% /home/mysql

[root@qxyw ~]# blkid
/dev/xvda1: UUID="5546dd0c-ef40-451b-b266-df8ef3a49967" TYPE="swap" 
/dev/xvda2: UUID="77fc0962-b3cf-400a-8903-0632e077fa09" TYPE="ext3" 
/dev/xvde1: UUID="1d17945b-c369-42de-85a8-47217d24d3e5" TYPE="ext4"

#
# /etc/fstab
# Created by anaconda on Thu Jan 12 02:47:21 2017#
# 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=77fc0962-b3cf-400a-8903-0632e077fa09 /                       ext3    defaults        1 1UUID=5546dd0c-ef40-451b-b266-df8ef3a49967 swap                    swap    defaults        0 0tmpfs                   /dev/shm                tmpfs   defaults        0 0devpts                  /dev/pts                devpts  gid=5,mode=620  0 0sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
UUID=d17945b-c369-42de-85a8-47217d24d3e5 /home/mysql ext4 defaults      0 0

[root@qxyw /]# cd home[root@qxyw home]# mkdir mysql
[root@qxyw home]# mv /var/lib/mysql/* /home/mysql[root@qxyw home]# ln /home/mysql /var/lib/mysql

[root@qxyw mysql]# df
Filesystem           1K-blocks      Used Available Use% Mounted on/dev/xvda2            37155392   2417608  32850400   7% /tmpfs                  4018012         0   4018012   0% /dev/shm/dev/xvde1           309633052    217092 293687524   1% /home/mysql