IBM XIV Storage System Copy Services and Migration

When a partially populated XIV has a hardware upgrade to add usable capacity, more datamodules are added. At particular points in the upgrade path, the XIV will get more usableFibre Channel ports. In each case, we use half the available ports to communicate with anSVC cluster (we do this to facilitate growth as modules are added). Depending on the totalusable capacity of the XIV, not all interface modules have active Fibre Channel ports.Table 8-1 shows which modules will have active ports as capacity grows. You can also seehow many XIV ports we zone to the SVC as capacity grows.Table 8-1 XIV host ports as capacity growsXIV modulesTotal usablecapacity (TB)Total XIVhost portsXIV hostports to zoneto an SVCclusterActiveinterfacemodulesInactiveinterfacemodules6 27.26 8 4 4:5 69 43.09 16 8 4:5:7:8 6:910 50.29 16 8 4:5:7:8 6:911 54.65 20 10 4:5:7:8:9 612 61.74 20 10 4:5:7:8:9 613 66.16 24 12 4:5:6:7:8:914 73.24 24 12 4:5:6:7:8:915 79.11 24 12 4:5:6:7:8:9Another way to view the activation state of the XIV interface modules is shown in Table 8-2.As additional capacity is added to an XIV, additional XIV host ports become available. Wherea module is shown as inactive, this refers only to the host ports, not the data disks.Table 8-2 XIV host ports as capacity growsModule 27 TB 43 TB 50 TB 54 TB 61 TB 66 TB 73 TB 79 TBModule 9host portsModule 8host portsModule 7host portsModule 6host portsModule 5host portsModule 4host portsNot present Inactive Inactive Active Active Active Active ActiveNot present Active Active Active Active Active Active ActiveNot present Active Active Active Active Active Active ActiveInactive Inactive Inactive Inactive Inactive Active Active ActiveActive Active Active Active Active Active Active ActiveActive Active Active Active Active Active Active Active8.3.1 Capacity on demandIf the XIV has the Capacity on Demand (CoD) feature, then all Fibre Channel interface portsare present and active (usable) at the time of install, regardless of how much usable capacityhas been purchased.246 IBM XIV Storage System: Copy Services and Migration