A company plans to upgrade all the servers on a site from their current hard drive devices to Serial ATA drives. This is a major upgrade that will affect all the servers and the clients who depend on the network services and the critical data they provide. Which action should be taken before attempting this upgrade?
A.
set up an isolated server, install SATA drives identical to the ones to be used for the upgrade, and run a pilot program of testing prior to deployment
B.
develop an upgrade checklist that includes obtaining the latest drivers, operating system updates, ESD (electrostatic discharge) best practices, and downtime schedules
C.
make sure that each server has a full and redundant backup of the operating system, applications, and data, and update the servers
D.
create a performance baseline on each server to be compared after the upgrade, and update the servers