3.7 Upgrade peripheral devices, internal and external
Verify appropriate system resources (e.g., expansion slots, IRQ, DMA, etc.)
Perform upgrade checklist
A peripheral device is any device that is not part of the core computer system (processor, memory, and the data bus). Peripheral devices can be either internal to the server chassis or external to the network server chassis.
Balance the Load When adding additional adapters (NICs, SCSI controllers, RAID controllers, and so on) to network servers that have multiple peer (not bridged) buses, consider the data load expected to be supported by the new adapter. By doing so you can decide which bus is the best candidate for installation of the new adapter.