RAID Configuration for Two-Channel RAID Controller: RAID1 and RAID5

B.

In this scenario, the technician is using a two-channel RAID controller to set up two different RAID configurations: RAID1 for the first channel and RAID5 for the second channel. The RAID1 configuration uses mirroring to create a duplicate copy of the data on each disk, while the RAID5 configuration uses striping with parity to provide fault tolerance and improved performance.

There are six 1TB disks total, so we need to allocate them between the two RAID configurations.

For the RAID1 configuration, we need two disks since RAID1 requires at least two disks to provide redundancy. Therefore, two of the six disks will be used for RAID1.

For the RAID5 configuration, we need at least three disks to provide fault tolerance through parity. With three disks, we can lose one disk without losing any data. Therefore, we will use three of the six disks for RAID5.

This leaves us with one disk remaining. Since we cannot split a disk between RAID configurations, we will allocate it to one of the two configurations. Since we already have two disks allocated to RAID1 and three disks allocated to RAID5, the only option left is to allocate the remaining disk to the RAID5 configuration.

Therefore, the final configuration will be:

• RAID1: 2 disks (1TB each) = 2TB total capacity
• RAID5: 3 disks (1TB each) = 2TB total capacity (usable capacity will be less due to parity)
• Single disk: 1 disk (1TB) = 1TB total capacity

In summary, the correct answer is C. Three disks will be used for RAID1 and three disks will be used for RAID5.