A licensed service on the node that enables you to export LUNs to hosts using the SCSI protocol over a Fibre Channel fabric.
HBA ( host bus adapter )
An I/O adapter that connects a host I/O bus to a computer's memory system. HBA is the preferred term in SCSI contexts. The HBA might be an FCP adapter or an iSCSI adapter. An adapter might have multiple ports.
host
A system that is accessing data on a node as blocks. The host accesses data using the FCP or iSCSI protocols.
igroup ( Initiator Group )
A collection of the unique identifiers, either iSCSI node names or WWPNs of initiators (hosts). Initiator groups can have multiple initiators, and multiple initiator groups can have the same initiator. To make the LUNs accessible to hosts, you use the lun map command to map LUNs to an initiator group. By mapping LUNs to the hosts listed in the initiator group, you allow access to the LUNs to these hosts. If you do not map a LUN, the LUN is not accessible to any hosts. The following example shows an FCP initiator group with two initiators:
igroup_1 (FCP) (ostype: solaris): 10:00:00:00:c7:2c:36:3e 10:00:00:00:c8:2c:37:g1
Initiator
The system component that originates an I/O command over an I/O bus or network.
iSCSI
A licensed service on the node that enables you to export LUNs to hosts using the SCSI protocol over TCP/IP.
LUN ( logical unit number )
The SCSI identifier of a logical unit within a target.
LUN clone
A complete copy of a LUN, which was initially created to be backed by a LUN or a file in a snapshot. The clone creates a complete copy of the LUN and frees the snapshot, which can then be deleted. For more information, see the lun create -b command on the man page for na_lun.
LUN path Mapped to LUN ID --------------------------------------------------- /vol/vol10/fcpdb.lun igroup_1 6
LUN path
The path to a LUN on the node. The following example shows a LUN path:
LUN path Mapped to LUN ID --------------------------------------------------- /vol/vol10/fcpdb.lun igroup_1 6
LUN serial
The unique serial number for a LUN as defined by the node. You use the lun serial command to change this number. The following example shows a LUN serial number:
node_1> lun show -v /vol/vol0/fcpdb /vol/vol0/fcpdb 10m (10485760) (r/w, online) Serial#: Och/RngAi4p4 Share: none Space Reservation: enabled Multiprotocol Type: image
map
To create an association between a LUN and an initiator group. A LUN mapped to an initiator group is exported to the nodes in the initiator group (WWNN or iqn) when the LUN is online. LUN maps are used to secure access relationships between LUNs and the host.
online
Signifies that a LUN is exported to its mapped initiator groups. A LUN can be online only if it is enabled for read/write access.
offline
Disables the export of the LUN to its mapped initiator groups. The LUN is not available to hosts.
share
Allows the LUN's data be accessible through multiple file protocols such as NFS and FCP. One can share a LUN for read or write access, or all permissions.
target
The system component that receives a SCSI I/O command.
WWN ( World Wide Number )
A unique 48 or 64-bit number assigned by a recognized naming authority (often through block assignment to a manufacturer) that identifies a connection to the storage network. A WWN is assigned for the life of a connection (device).
WWNN ( World Wide Node Name )
Every node has a unique World Wide Node Name (WWNN), which Data ONTAP refers to as a Fibre Channel Nodename, or simply node name. NetApp assigns a WWNN to a node based on the serial number of its NVRAM. The WWNN is stored on disk. The WWNN is a 64-bit address represented in the following format: nn:nn:nn:nn:nn:nn:nn:nn, where n represents a hexadecimal value.
WWPN ( World Wide Port Name )
Each Fibre Channel device has one or more ports that are used to connect it to the SAN network. Each port has a unique World Wide Port Name (WWPN), which Data ONTAP refers to as an FC Portname, or simply port name. The WWPN is a 64-bit address represented in the following format: nn:nn:nn:nn:nn:nn:nn:nn, where n represents a hexadecimal value.