If a technician has six 1TB disks and uses RAID 1 for the first channel and RAID 5 for the second channel, how will the configuration look?

In this scenario, the technician is configuring six 1TB disks using two different RAID levels: RAID 1 and RAID 5.

RAID 1, known for its mirroring capabilities, requires a minimum of two disks but would typically use an even number of disks as each disk is mirrored to another. This means that for every disk used in RAID 1, an identical disk must also be used to store the same data, effectively halving the usable storage capacity for that portion.

On the other hand, RAID 5 uses striping with parity, which requires a minimum of three disks. The parity information allows for data recovery in case of a single disk failure. In a RAID 5 configuration, the effective storage capacity is n-1, where n is the number of disks used, as one disk's worth of space is dedicated to parity.

Given that there are 6 disks available, the configuration of two disks in RAID 1 allows for a mirrored setup, consuming 2 disks, which leaves 4 disks available for the RAID 5 configuration. With those 4 disks in RAID 5, the effective storage would be 4 disks - 1 disk for parity, resulting in 3 disks worth of usable space.