A Fibre Channel switch has eight ports and all ports must be operational from 6 AM to 6 PM, Monday through Friday.
However, a failure of Port 4 occurs with the week as follows:
Monday= 11 AM to 1 PM
Wednesday= 5 PM to 10 PM
Thursday= 7 AM to 10 AM
Saturday= 11 AM to 1 PM
What is the availability of Port 4 in that week?
Front-end ports connect the storage array controller to the host servers, while back-end ports connect it to the disk drives. The cache provides temporary storage for frequently accessed data to speed up I/O operations. Link control cards manage communication between the front-end and back-end ports.
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