Question

Famous requirement for availability is "five nines." this refers to the requirement that a device or a service must be available 99.999 percent of the time. Assume that you have a device with hardware availability of 99.9995 percent. Now assume that an operational error is made that causes the device to go offline for 5 minutes until the error is corrected. Calculated over a period of a month, how much has the operational error just caused availability to drop?

Answer 1

it's too long question I don't know