SafeGuard Solutions Deploying Brocade AP-7600B and PB-48K ...

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◆ Unisys SafeGuard Solutions Replication Appliance Administrator’s Guide ◆ Unisys SafeGuard Solutions Replication Appliance Command Line Interface (CLI) Reference Guide ◆ Unisys SafeGuard Solutions Replication Appliance Installation Guide Overview of the deployment concepts Common terms for the deployment The new generation of EMC Brocade storage virtualization solutions is delivered both as the AP-7600B stand-alone switch, and as the PB-48K-AP4-18 blade, which slots into a Brocade EC-48000B director. Both offer 16 Fibre Channel ports. The management of these two platforms is divided between the following components: ◆ Control processor (CP) — Runs the Fabric OS and handles layer 2 communications. ◆ Blade processor (BP) — Runs the storage application services (SAS) and manages the virtualization layer. The Unisys SafeGuard Solutions SAS agent is installed on the BP. The CP and BP have unique IP addresses. You can use the ipaddrshow switch CLI command to display the IP address for each. It may be helpful to refer to Figure 2 on page 8 while reading the following paragraphs: ◆ Data path controller — Both the AP-7600B and PB-48K-AP4-18 have two data path controllers (DPCs). The DPC handles most I/O operations without further CPU involvement. You can associate a set of virtual initiators and virtual targets with each DPC. Note: When working with Unisys SafeGuard Solutions Release 6.1, in frame redirect mode, both DPCs are utilized. Otherwise, only one DPC is utilized. ◆ Host initiator — Each HBA on a host machine can be a host initiator (HI). Each host initiator is represented by a single virtual initiator on each DPC that it uses. 4 Unisys SafeGuard Solutions Deploying Brocade AP-7600B and PB-48K-AP4-18 Devices Technical Notes
◆ Virtual initiator — When working in multi-VI mode, a single virtual initiator (VI) is created to correspond with each host (HBA) initiator. In frame redirect mode, if the host is bound to targets on both DPCs, a separate VI is created for that host for each DPC. The WWN that is set for the virtual initiator is different from the WWN of the host initiator to which it corresponds. When working in multi-VI mode, LUN masking exposes the storage ports to the virtual initiator, rather than to the host initiator. In frame redirect, LUN masking does not change from that which is already in place for the host HBA. ◆ System virtual initiator — Unisys SafeGuard Solutions SAS agent creates a special System VI, to support communication between the splitter and the RAs. ◆ Virtual target — The virtual target (VT) is a representation on the switch of the actual storage target to which the host initiator directs it I/O. Its WWN is different, however, from the WWN of the storage target (as presented in “Virtual target WWNs” on page 11). Note: The point at which the Unisys SafeGuard Solutions SAS agent creates a virtual target depends on whether you are working in “multi-VI” or “frame redirect” mode. These modes are described in “Multi-VI and frame redirect modes” on page 6. The Unisys SafeGuard Solutions SAS agent creates the virtual target as follows: In multi-VI mode, upon first binding a host initiator to the virtual initiator to which the storage target is exposed. The host initiator then sends its I/O to the virtual target, rather than to the storage target. In frame redirect mode, upon first binding a host initiator to the storage target. ◆ Appliance virtual target — The appliance virtual target (AVT) is a special virtual target that ensures that the RA has access to the storage targets for groups that use reservations, as described in “Reservations” on page 15. ◆ Storage target — The storage target (ST) is a physical port on the storage array, to which the data written by the host initiator is ultimately directed. Unisys SafeGuard Solutions Deploying Brocade AP-7600B and PB-48K-AP4-18 Devices Technical Notes 5
Page 1 and 2: Unisys SafeGuard Solutions Deployin
Page 3 and 4: EMC ® Unisys SafeGuard Solutions D
Page 5: Table 1 Supported FOS and SAS per U
Page 9 and 10: Host Initiator FCID F2 Target FCID
Page 11 and 12: Figure 3 shows an example, when usi
Page 13 and 14: Virtual target WWNs Figure 4 shows
Page 15 and 16: Table 2 lists the minimal zoning th
Page 17 and 18: Figure 6 Required zoning for frame
Page 19 and 20: Scalability limitations The limitat
Page 21 and 22: Prepare Unisys SafeGuard Solutions
Page 23 and 24: 9. If working in multi-VI mode, cre
Page 25 and 26: 14. Create the Brocade zone, and ad
Page 27 and 28: Running and upgrading Unisys SafeGu
Page 29 and 30: Upgrading the SAS ◆ firmwareshow
Page 31 and 32: Migrating from multi-VI to frame re
Page 33 and 34: Preliminaries 1. Ensure that the co
Page 35 and 36: Connecting to the AP-7600B over a s
Page 37 and 38: To display on-screen syntax help, r
Page 40: © 2008 Unisys Corporation. All rig

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