Device Setup Requirements/Configuration

To support discovery, install EMC Solutions Enabler on the host where the Symmetrix VAIL provider is installed. For instructions on installing EMC Solutions Enabler, see your vendor documentation.

If you want to install EMC Solutions Enabler at a location other than the default location, use the EMC Symmetrix Control Panel on the VEA GUI to input the install location to the EMC Symmetrix VAIL provider.

To fully discover an array, the host on which EMC Solutions Enabler is installed must be able to see a VCMDB LUN in the storage array. In addition to the VCMDB LUN, one other LUN in the array should be visible to the host where Solutions Enabler is installed. This LUN acts as a "gatekeeper" and enables communication between the host and the storage array. If the VCMDB LUN is the only LUN in the array that is visible to the host, Solutions Enabler uses it as the gatekeeper, but this is not an optimal configuration. If a second LUN is not visible to the host, determine whether the LUNs in the array are all masked or zoned away from the host where Solutions Enabler is installed. Verify that the VCMDB and other gatekeeper devices are not in the NR (Not Ready) state. See the EMC Host Connectivity Guide documentation for information about performing Fabric Configuration, Device Mapping, and Device Masking operations required to make gatekeeper devices visible to the host where Solutions Enabler is installed.

Exclude the VCMDB and other gatekeeper devices from multipathing.

Do not run more than one tool (GUI or CLI) at the same time that alters the device masks on an array because this can corrupt array configuration data.

EMC limits the number of World Wide Names(WWNs) that can be assigned to a single FA port to 32. If more than 32 WWNs are assigned to an array port, EMC Solutions Enabler returns an error message. To assign new HBA WWNs to an array port that already has the maximum 32 WWNs assigned to it, first remove some of the WWNs from the port to create available slots in the database. For instructions, see your vendor documentation.