New raid1~ in Linux come and take a look at it.

OperationPartitioning:

[Email protected] ~]# fdisk-l

disk/dev/sdb:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

disk/dev/sdc:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

disk/dev/sdd:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

Fdisk/dev/sdb

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 ').

[Email protected] ~]# Fdisk/dev/sdb

Command (M for help): t

Selected partition 1

Hex code (type L to list codes): FD

Changed system type of partition 1 to FD (Linux raid AutoDetect)

EstablishRAID1

[Email protected] ~]# mdadm-c/dev/md0-l 1-n 2/dev/sd[bc]1

Mdadm:Note:this array have metadata at the start and

May is suitable as a boot device. If you plan to

Store '/boot ' on this device, ensure that

Your Boot-loader understands md/v1.x metadata, or use

--metadata=0.90

Continue creating array? Yes

Mdadm:defaulting to version 1.2 metadata

Mdadm:array/dev/md0 started.

Creating a file system

Formatting :

[Email protected] ~]# mkfs.ext4/dev/md0

[Email protected] ~]# mkdir/data/

[Email protected] ~]# mount/dev/md0/data/

[Email protected] ~]# ll/data/

Total 16

drwx------2 root root 16384 5 11:16 lost+found

[email protected] ~]# Vi/etc/fstab

At the end, add the following:

drwx------2 root root 16384 15:21 lost+found

[Email protected] ~]# Mdadm-ds

Array/dev/md0 metadata=1.2 name=localhost.localdomain:0 uuid=c00e8204:a51e89ea:f6069fbe:9350ed9a

Write a configuration file

[Email protected] ~]# Mdadm-ds >>/etc/mdadm.conf

Restart

[email protected] ~]# reboot

[email protected] ~]# mount

/dev/mapper/volgroup-lv_root on/type ext4 (rw)

Proc On/proc type proc (rw)

Sysfs On/sys type SYSFS (rw)

Devpts on/dev/pts type devpts (rw,gid=5,mode=620)

Tmpfs ON/DEV/SHM type TMPFS (rw)

/DEV/SDA1 on/boot type EXT4 (rw)

/dev/md0 on/data type EXT4 (rw)

None On/proc/sys/fs/binfmt_misc type Binfmt_misc (rw)

Analog Failure

[Email protected] ~]# mdadm/dev/md0-a/DEV/SDB1

Mdadm:added/dev/sdb1

[Email protected] ~]# Cat/proc/mdstat

Personalities: [RAID1]

Md0:active RAID1 sdb1[2] sdc1[1]

20948288 blocks Super 1.2 [2/1] [_u]

[=====>.......] Recovery = 28.7% (6021952/20948288) finish=1.5min speed=159484k/sec

Unused devices: <none>

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