What is the disk load at peak activity for a RAID 6 configuration?

Calculating Disk Load for RAID 6:Here’s how to calculate the disk load at peak activity for a RAID 6 configuration:

1. Separate reads and writes:

• Total I/Os: 4200
• Read/write ratio: 2:1
• Reads: 4200 * (2/3) = 2800
• Writes: 4200 * (1/3) = 1400

1. Consider RAID 6 write penalty:

• RAID 6 writes involve reading multiple data and parity blocks, then calculating and writing new parity blocks. This creates a write penalty of 2x compared to RAID 0.

1. Calculate total disk load:

• Disk Load = Reads + (Writes * Write Penalty)
• Disk Load = 2800 + (1400 * 2)
• Disk Load = 2800 + 2800
• Disk Load = 5600 I/Os

Therefore, the disk load at peak activity for a RAID 6 configuration is 5600 I/Os.
Important Note: This calculation assumes equal read and write access times. In reality, random I/Os can be slower than sequential I/Os, and performance might be further impacted by specific workload characteristics and hardware limitations.