RAID0创建
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[[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# 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. [[email protected] ~]# mdadm -Ds ARRAY /dev/md0 metadata=1.2 name=ZQ:0 UUID=00d9284f:6fd6b3b0:afc571c6:c5441608 [[email protected] ~]# 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 [[email protected] ~]# mdadm -Ds > /etc/mdadm.conf [[email protected] ~]# cat /etc/mdadm.conf ARRAY /dev/md0 metadata=1.2 name=ZQ:0 UUID=00d9284f:6fd6b3b0:afc571c6:c5441608 [[email protected] ~]# 使用raid0，先分区 [[email protected] ~]# 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. [[email protected] ~]# ll /dev/md0 brw-rw----. 1 root disk 9, 0 Jun 4 06:03 /dev/md0 [[email protected] ~]# 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 [[email protected] ~]# 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 [[email protected] ~]# mkdir /raid0 [[email protected] ~]# mount /dev/md0p1 /raid0/ [[email protected] ~]# ls !$ ls /raid0/ lost+found [[email protected] ~]# cp /etc/passwd /raid0/ [[email protected] ~]# ls !$ ls /raid0/ lost+found passwd [[email protected] ~]# mkdir /raid0 [[email protected] ~]# mount /dev/md0p1 /raid0/ [[email protected] ~]# ls !$ ls /raid0/ lost+found [[email protected] ~]# cp /etc/passwd /raid0/ [[email protected] ~]# ls !$ ls /raid0/ lost+found passwd [[email protected] ~]# vim /etc/fstab [[email protected] ~]# 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
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