On most implememntations of RAID controllers, RAID 01 fault tolerance is less. The main difference is the fault tolerance level.The storage capacity on these will be the same.Performance on both RAID 10 and RAID 01 will be the same.Main difference between RAID 10 vs RAID 01 i.e the disks within the groups are striped. This is why it is called “mirror of stripes”.i.e Disk 1 is mirrored to Disk 4, Disk 2 to Disk 5, Disk 3 to Disk 6. i.e The Group 1 and Group 2 will look exactly the same. Across the group, the data is mirrored.So, block A is written to Disk 1, block B to Disk 2, block C to Disk 3. i.e In the Group 1 which contains three disks, the 1st block will be written to 1st disk, 2nd block to 2nd disk, and the 3rd block to 3rd disk. Within the group, the data is striped.In the above example, Group 1 has 3 disks and Group 2 has 3 disks. For example, if you have total of 6 disks, create two groups with 3 disks each as shown below. To understand this better, create two groups.But in most cases this will be implemented as minimum of 4 disks. It is also called as “mirror of stripes”.If you are new to this, make sure you understand how RAID 0, RAID 1 and RAID 5 and RAID 2, RAID 3, RAID 4, RAID 6 works. i.e the disks within the group are mirrored. This is why it is called “stripe of mirrors”.i.e Block A is written to Group 1, Block B is written to Group 2, Block C is written to Group 3. Across the group, the data is striped.Block B written on Disk 3 will be mirrored on Disk 4. So, block A written on Disk 1 will be mirroed on Disk 2. The data on Disk 1 will be exactly same as the data on Disk 2. In the above example, Disk 1 and Disk 2 belongs to Group 1.
Within the group, the data is mirrored.For example, if you have a total of 6 disks in RAID 10, there will be three groups–Group 1, Group 2, Group 3 as shown in the above diagram. To understand this better, group the disks in pair of two (for mirror).It is also called as “stripe of mirrors”.In the following diagrams A, B, C, D, E and F represents blocks. I’m going to keep this explanation very simple for you to understand the basic concepts well. This article explains the difference between the two with a simple diagram.
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