A customer created a RAID 6 volume using 4x 600GB disks. How much usable disk space is available?

In a RAID 6 configuration, the setup allows for two disks worth of redundancy, meaning that two disks can fail without losing data. This is achieved by distributing parity information across all disks in the array.

When calculating the usable disk space in a RAID 6 configuration, the formula is:

Total usable space = (Number of disks - 2) x Size of each disk

Here, the customer has 4 disks, each of 600GB. Applying the formula:

1. Calculate the number of disks utilized for data: 4 disks - 2 disks (for redundancy) = 2 disks.

2. Then, multiply the number of usable disks by the size of each disk: 2 disks x 600GB = 1200GB, which can also be represented as 1.2TB.

Thus, the available usable disk space for the RAID 6 volume created by the customer is indeed 1.2TB. This demonstrates how the redundancy offered by RAID 6 influences the total usable space by sacrificing some capacity for data protection.