Figure 3.4 RAID 10 Array

MegaRAID Controller

 

 

Data Flow

 

RAID 1

 

RAID 1

 

Disk 1

Disk 2

Disk 3

Disk 4

Segment 1

Segment 1

Segment 2

Segment 2

Segment 3

Segment 3

Segment 4

Segment 4

Segment 5

Segment 5

Segment 6

Segment 6

 

 

RAID 0

 

3.6RAID 50

RAID 50 provides the features of both RAID 0 and RAID 5, including both parity and disk striping across multiple drives. RAID 50 is best implemented on two RAID 5 disk arrays with data striped across both disk arrays. RAID 50 breaks up data into smaller blocks, and then stripes the blocks of data to each RAID 5 RAID set. RAID 5 breaks up data into smaller blocks, calculates parity by performing an exclusive-or on the blocks, and then writes the blocks of data and parity to each drive in the array. The size of each block is determined by the stripe size parameter, which is set during the creation of the RAID set.

RAID 50

3-7

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