1. Add five more disks to the virtual machine.
2.Use themdadm command to create raid5 with the name “/dev/md5”.
-C stands for creation operation, -v shows During the creation process, -a yes to check the RAID name, -n is the number of hard disks used, -l is to define the RAID level and write the name of the hard disk to be added to the array at the end
< p style="text-align: left;">Enter mdadm -Cv /dev/md5 -a yes -n 3 -l 5 /dev/sdb / dev/sdc /dev/sdd /dev/sde/dev/sdf
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3. Format and mount for use
FormatRAID disk array to ext4 format:
input: mkfs.ext4 /dev/md5
4. Create a mount directory:
input: mkdir /RAID
To mount the file system:
Enter: mount /dev/md5/RAID
View disk mounting information:
< strong>Enter: df -h
5.View/dev/md0 device information
Parameter-D View the detailed information of the RAID array:
Enter: mdadm -D /dev/md5
6.Set up redundant backup disk
If initialized< /span>When a RAID5 array is used, 5 hard disks are directly given, of which 2 hard disk devices are used for automatic replacement when a certain disk in the array fails. First, unmount the disk system: input: umount /dev/md5 strong>
Stop the array device and completely deactivate it: Input: mdadm -S /dev/md5
Now the array has been found Not anymore: input: mdadm -D /dev/md5
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7.Createraid5 and set up two backup failure disks.
Input:mdadm -Cv /dev/md5 -n 3 -l 5 -x 2 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf
8.View the detailed information of the array (The number of Spare Devices is 2):
Enter: mdadm -D /dev/md5
9.Format the disk array toext4 system:
Input: mkfs.ext4 /dev/md5
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10.Because the fstab file has been set before, it can be mounted directly now:
Enter: mount -a
set the /dev/sdb device to fail and move it out of the array:/dev/sdb strong>
Enter mdadm /dev/md5 -f /dev/sdb
Set the /dev/sdc device to fail and move out of the array:
Enter mdadm /dev/md5 -f /dev/sdc
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11.Let’s look at the detailed information of the array again (the hard disk sde is directly replaced at this time):< /p>
Enter: mdadm -D /dev/md5
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