HP StorageWorks XP Remote Web Console Software - Manual (Page 146)

• The following are restrictions for mapping command devices as remote command devices.
Table 10 Restrictions on remote command devices
Restriction Item
OPEN-V Emulation type
1 Number of LDEVs in an external LU
Disable IO Suppression mode
Disable Cache mode
96,000 blocks (about 47 MB) Minimum capacity
2 TB Maximum capacity
• XP External Storage's Discovery operation cannot identify remote command devices.
• When an external array has a remote command device (that is, when a command device in an-
other external array is mapped to this external array), make sure that the remote command device
does not have the smallest LUN ID on the port in the external array.
• 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.
• XP Cache LUN 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) .
NOTE:
Command devices that can be mapped as remote command devices are displayed on XP External
Storage's panes as shown in
Table 9 .
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) to map it.
Remote command devices 146