A Fibre Channel switch has eight ports and all ports must be operational from 8...

Total Operational Hours (Monday to Friday): 12 hours/day * 5 days = 60 hours

Failure Times:

Monday: 2 hours (10 AM to 12 PM)

Wednesday: 5 hours (4 PM to 9 PM)

Thursday: 3 hours (4 PM to 7 PM)

Friday: 3 hours (3 PM to 6 PM)

Saturday (not counted in the required time frame)

Total Failure Hours (Monday to Friday): 2 + 5 + 3 + 3 = 13 hours

Availability Calculation:Availability=(Total Operational Hours−Failure HoursTotal Operational Hours)×100Availability=(Total Operational HoursTotal Operational Hours−Failure Hours​)×100Availability=(60−1360)×100=70Availability=(6060−13​)×100=70

References: Dell ISM V5 Course, Module on Availability and Performance Management.