[root@ZQ ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x1a13ee0f.
Command (m for help): p
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x1a13ee0f
Device Boot Start End Blocks Id System
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +1G
Partition 1 of type Linux and of size 1 GiB is set
Command (m for help): p
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x1a13ee0f
Device Boot Start End Blocks Id System
/dev/sdb1 2048 2099199 1048576 83 Linux
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (2099200-20971519, default 2099200):
Using default value 2099200
Last sector, +sectors or +size{K,M,G} (2099200-20971519, default 20971519): +1G
Partition 2 of type Linux and of size 1 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
开始创建raid0
[root@ZQ ~]# ll /dev/sdb*
brw-rw----. 1 root disk 8, 16 Jun 4 05:47 /dev/sdb
brw-rw----. 1 root disk 8, 17 Jun 4 05:47 /dev/sdb1
brw-rw----. 1 root disk 8, 18 Jun 4 05:47 /dev/sdb2
[root@ZQ ~]# ll /dev/sda*
brw-rw----. 1 root disk 8, 0 Jun 4 05:35 /dev/sda
brw-rw----. 1 root disk 8, 1 Jun 4 05:35 /dev/sda1
brw-rw----. 1 root disk 8, 2 Jun 4 05:35 /dev/sda2
brw-rw----. 1 root disk 8, 3 Jun 4 05:35 /dev/sda3
[root@ZQ ~]# mdadm -C -v /dev/md0 -l 0 -n 2 /dev/sdb1 /dev/sdb2 #-C --creat创建一个新阵列 -v 显示详细信息（-verbose） -l --level设定磁盘阵列的级别 -n --raid device 指定阵列成员的数量
mdadm: chunk size defaults to 512K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@ZQ ~]# mdadm -Ds
ARRAY /dev/md0 metadata=1.2 name=ZQ:0 UUID=00d9284f:6fd6b3b0:afc571c6:c5441608
[root@ZQ ~]# mdadm -D /dev/md0 #查看具体信息
/dev/md0:
Version : 1.2
Creation Time : Sun Jun 4 05:51:54 2017
Raid Level : raid0
Array Size : 2095104 (2046.00 MiB 2145.39 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sun Jun 4 05:51:54 2017
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 512K
Name : ZQ:0 (local to host ZQ)
UUID : 00d9284f:6fd6b3b0:afc571c6:c5441608
Events : 0
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 18 1 active sync /dev/sdb2
需要自己手动生成配置文件
[root@ZQ ~]# mdadm -Ds > /etc/mdadm.conf
[root@ZQ ~]# cat /etc/mdadm.conf
ARRAY /dev/md0 metadata=1.2 name=ZQ:0 UUID=00d9284f:6fd6b3b0:afc571c6:c5441608
[root@ZQ ~]#
使用raid0，先分区
[root@ZQ ~]# fdisk /dev/md0
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x60e13d32.
Command (m for help): p
Disk /dev/md0: 2145 MB, 2145386496 bytes, 4190208 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk label type: dos
Disk identifier: 0x60e13d32
Device Boot Start End Blocks Id System
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-4190207, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-4190207, default 4190207):
Using default value 4190207
Partition 1 of type Linux and of size 2 GiB is set
Command (m for help): p
Disk /dev/md0: 2145 MB, 2145386496 bytes, 4190208 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk label type: dos
Disk identifier: 0x60e13d32
Device Boot Start End Blocks Id System
/dev/md0p1 2048 4190207 2094080 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@ZQ ~]# ll /dev/md0
brw-rw----. 1 root disk 9, 0 Jun 4 06:03 /dev/md0
[root@ZQ ~]# ll /dev/md0*
brw-rw----. 1 root disk 9, 0 Jun 4 06:03 /dev/md0
brw-rw----. 1 root disk 259, 1 Jun 4 06:03 /dev/md0p1
[root@ZQ ~]# mkfs.ext4 /dev/md0p1 #格式化，生成文件系统
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
131072 inodes, 523520 blocks
26176 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
[root@ZQ ~]# mkdir /raid0
[root@ZQ ~]# mount /dev/md0p1 /raid0/
[root@ZQ ~]# ls !$
ls /raid0/
lost+found
[root@ZQ ~]# cp /etc/passwd /raid0/
[root@ZQ ~]# ls !$
ls /raid0/
lost+found passwd
[root@ZQ ~]# mkdir /raid0
[root@ZQ ~]# mount /dev/md0p1 /raid0/
[root@ZQ ~]# ls !$
ls /raid0/
lost+found
[root@ZQ ~]# cp /etc/passwd /raid0/
[root@ZQ ~]# ls !$
ls /raid0/
lost+found passwd
[root@ZQ ~]# vim /etc/fstab
[root@ZQ ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 15G 3.6G 12G 24% /
devtmpfs 474M 0 474M 0% /dev
tmpfs 489M 156K 489M 1% /dev/shm
tmpfs 489M 7.0M 482M 2% /run
tmpfs 489M 0 489M 0% /sys/fs/cgroup
/dev/sda1 197M 131M 67M 67% /boot
tmpfs 98M 8.0K 98M 1% /run/user/1000
/dev/sr0 4.1G 4.1G 0 100% /run/media/zq/CentOS 7 x86_64
tmpfs 98M 0 98M 0% /run/user/0
/dev/md0p1 2.0G 6.1M 1.9G 1% /raid0
