With GST, if you connect the same four volumes, you connect to the one target. For example, with Volume Scoped Target (VST), if you connect four iSCSI volumes to the host, connect each target to the host individually. GST reduces the number of individual host connections needed for configuration and management, which saves you time. NimbleOS 5.1.x and later supports iSCSI Group Scoped Target (GST) on HPE Nimble Storage iSCSI arrays. While data volume attachment paths can have many target ports configured, typically a Nimble storage system is configured in HPE OneView with the port groups automatically assigned to the minimal set of target ports (one port on each controller in the storage system group), instead of making all the targets accessible through the path network. A dual array storage system group that requires four target ports for proper failover redundancy cannot properly support boot volumes. Therefore, Hewlett Packard Enterprise recommends using only single-array storage system groups when configuring Fibre Channel connectivity. HPE OneView can only provision a single pair of target ports to boot a server. In Nimble storage systems, if SAN is configured using Fibre Channel over Ethernet (FCoE), the Nimble port is configured using the Fibre Channel. For Fibre Channel access, configure a SAN zone or a network for at least one port on each active controller and standby controller for proper redundancy (if there is controller failover) and for supporting volumes that move from one pool (controller pair) to another. ISCSI discovery and data access IP addresses are not tied to a specific controller or port. Failover occurs at the controller level and not at the individual port level. Each controller, typically, has 4 to 12 ports, and storage volumes are available to all the active ports. Each array has a pair of controllers - an active controller and a standby controller. A storage pool is configured for each array. A Nimble storage system consists of a group of one to four storage arrays.
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