HP StorageWorks XP Remote Web Console Software - Manual (Page 117)

External Storage XP user guide 117
• Device name
NOTE: The device name reported to the host is the same as the one displayed in the Device
column of the Device list. For the device names reported to the host, see Table 10 .
• The following are restrictions for mapping command devices as remote command devices.
• External Storage XP’s Discovery operation cannot identify remote command devices.
• You cannot execute I/Os to remote command devices.
• You cannot set command devices to disabled on remote command devices.
• You cannot set command devices’ security on remote command devices.
• Do not set command devices’ security on the external array side for command devices mapped as
remote command devices.
• You cannot create LUSE volumes using remote command devices.
• You cannot use Volume Manager to create CVs in remote command devices.
• Cache LUN XP is not available on remote command devices.
Mapping command devices as remote command devices
To map command devices in external arrays as remote command devices, see ” Mapping external LUs
(Add LU) ” on page 73.
NOTE: Command devices that can be mapped as remote command devices are displayed on External
Storage XP’s panes as shown in Table 10 .
When you select Discovery in the Device tree on the LU Operation pane, the external array’s WWNs
appear. When you select an external array’s WWN in the Device tree, information such as OPEN-V-CM
appears in the Device column of the Device list for command devices that can be mapped. Select a
command device that can be mapped, and follow the procedure in ” Mapping external LUs (Add LU) ” on
page 73 to map it.
Using Continuous Access XP or Continuous Access XP Journal with
remote command devices
To use Continuous Access XP or Continuous Access XP Journal with a remote command device, you would
traditionally need two different kinds of ports: an initiator port for Continuous Access XP or Continuous
Access XP Journal, and an external port for the remote command device. However, if you set the
Initiator/External MIX mode, you can use a port as both the initiator port for Continuous Access XP or
Continuous Access XP Journal and as the external port only for remote command device use.
Before setting the Initiator/External MIX mode, you must prepare initiator and external ports in one port
block of Standard mode. You can set the Initiator/External MIX mode on the port block consisting of the
initiator and external ports.
Table 11 Restrictions on remote command devices
Item Restriction
Emulation type OPEN-V
Number of LDEVs in an external LU 1
IO Suppression mode Disable
Cache mode Disable
Minimum capacity 96,000 blocks (about 47 MB)
Maximum capacity 2 TB