Mapping Command Devices As Remote Command Devices; Restrictions On Remote Command Devices - HP StorageWorks XP12000 User Manual

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
• Even if the status of the remote command device is normal, an error may occur when the operations
or commands are performed on the remote command device.
If an error occurs even though the status of the remote command device is normal, check the status
of the command device of the external array, not the remote command device.
• The following are restrictions for mapping command devices as remote command devices.
Table 11 Restrictions on remote command devices
Item
Emulation type
Number of LDEVs in an external LU
IO Suppression mode
Cache mode
Minimum capacity
Maximum capacity
• External Storage XP's Discovery operation cannot identify remote command devices.
• When an external subsystem has a remote command device (that is, when a command device in
another external subsystem is mapped to this external subsystem), make sure that the remote
command device does not have the smallest LUN on the port in the external subsystem.
• 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
(Add LU).
148 Remote command devices
Restriction
OPEN-V
1
Disable
Disable
96,000 blocks (about 47 MB)
2 TB
Table 10.
Mapping external LUs