In this chapter, we are going to discuss how to design the storage that meets the needs of the business. In general, we purchase storage mainly by considering its high availability, performance, capacity, and cost! So let's talk about the important factors:
The high availability of storage is critical. A high availability of storage is meant to ensure that in any case—whether the hard disk, controller, link switches, or the host's HBA is broken—the storage can still provide resources for the host to use and you can access the storage. So, a storage design must consider the redundancy of all components. First, hard disk redundancy can be achieved according to the demands of the hard disk, the corresponding RAID, controller to double alive, the trunk switch to redundancy, and the HBA to redundancy so that the entire link is redundant. As different types of storage, with greater levels of availability, are factored in, the cost obviously rises. However, the importance...