A datacenter has 100 TB of Tier 1 storage, 600 TB of Tier 2 storage and a large tape library. HSM is moving data from Tier 1 to Tier 2 at the rate of 5 TB per month, while 10% of Tier 2 data is transf

Data moves from Tier 1 to Tier 2 at 5 TB/month, totaling 60 TB/year (5 TB * 12 months). Concurrently, 10% of the 600 TB Tier 2 data, which is 60 TB/year (0.10 * 600 TB), is moved to tape. Since the inflow into Tier 2 (60 TB/year) equals the outflow from Tier 2 (60 TB/year), there is no net increase in Tier 2 storage needed, meaning 0 TB over two years.

This answer incorrectly assumes a minimal net increase or miscalculates the annual balance; it does not account for the equilibrium achieved by data moving to tape.

This answer calculates the total data moved from Tier 1 to Tier 2 over one year (5 TB/month * 12 months = 60 TB) but neglects to subtract the data moved out of Tier 2 to tape.

This answer calculates the total data moved from Tier 1 to Tier 2 over two years (5 TB/month * 24 months = 120 TB) but fails to account for the substantial amount of data moving out of Tier 2 to tape during that period.