Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 305

Zoning overview 11 Blue Zone Server 1 Server 2 Red Zone Storage 1 Storage 3 Green Zone RAID Server 3 Storage 2 FIGURE 29 Zoning example Approaches to zoning Table 53 lists the various approaches you can take when implementing zoning in a fabric. TABLE 53 Approaches to fabric-based zoning Zoning approach Description Recommended approach Single HBA Zoning by single HBA most closely re-creates the original SCSI bus. Each zone created has only one HBA (initiator) in the zone; each of the target devices is added to the zone. Typically, a zone is created for the HBA and the disk storage ports are added. If the HBA also accesses tape devices, a second zone is created with the HBA and associated tape devices in it. In the case of clustered systems, it could be appropriate to have an HBA from each of the cluster members included in the zone; this is equivalent to having a shared SCSI bus between the cluster members and assumes that the clustering software can manage access to the shared devices. In a large fabric, zoning by single HBA requires the creation of possibly hundreds of zones; however, each zone contains only a few members. Zone changes affect the smallest possible number of devices, minimizing the impact of an incorrect zone change. This zoning philosophy is the preferred method. Fabric OS Administrator's Guide 305 53-1002745-02