Create a RAID method.

Create a RAID method. -- Linux general technology-Linux technology and application information. For details, refer to the following section. Create raid 5 and repair
Create: create three shards hdb1, hdc1, and hdd1 for raid, format them, and then
Fdisk ---> n ---> t (type: fd) ---> w: hdb1, hdc1, hdd1
Mdadm-C/dev/md0-l5 -- raid-devices = 3/dev/hd [bcd] 1
Mkfs-t ext3/dev/md0
Mount;
Mount-t ext3/dev/md0/mnt
Test:
Cd/mnt
Touch f1
Touch f2
Fix: Create a partition hdb2, format it, and add it to md0;
Mdadm/dev/md0-f/dev/hdb1 (mark the hard disk as damaged)
Mdadm/dev/md0-r/dev/hdb1 (remove partition hdb1)
Fdisk/dev/hdb (type: fd)
Mkfs-t ext3/dev/hdb2 (format/dev/hdb2)
Mdadm/dev/md0-a/dev/hdb2 (add a good hard disk partition )!