Mapping A Command Device As A Remote Command Device - HP StorageWorks XP24000 User Manual

Table 30 Restrictions on Remote Command Device
Item
Emulation type
Number of LDEVs in an external volume
Cache mode
Minimum capacity
Maximum capacity
The remote command device cannot be identified by the port discovery or volume discovery
of XP External Storage.
When an external storage system (A) has a remote command device (B) [that is, when a
command device in another external storage system (C) is mapped to this external storage
system (A)], make sure that the remote command device (B) does not have the smallest LUN
ID on the port in the external storage system (A).
You cannot execute I/Os to the remote command device.
You cannot set the command device disable on the remote command device.
You cannot set the command device security on the remote command device.
Do not set the command device security on the external storage system side for the command
device that is mapped as a remote command device.
You cannot create a LUSE volume using a remote command device.
You cannot create CVs using the VLL function in the remote command device.
Cache Residency Manager is not available on the remote command device.

Mapping a Command Device as a Remote Command Device

The command devices that can be mapped as remote command devices appear in the Device
column of the Volume Operation window as shown in
To map a command device, select a command device that can be mapped and follow the procedure
in "Mapping an External Volume Automatically" (page
Using XP Continuous Access or XP Continuous Access Journal with Remote
Command Device
When you want to use XP Continuous Access or XP Continuous Access Journal with a remote
command device, you need two different kinds of ports, which are an initiator port for XP Continuous
Access or XP Continuous Access Journal and an external port for the remote command device.
However, if you set the Initiator/External MIX mode, you will be able to use a port as both initiator
port for XP Continuous Access or XP Continuous Access Journal and external port only for the
remote command device.
Before you set the Initiator/External MIX mode, you need to prepare initiator ports and external
ports in one port block of the Standard mode. You can set the Initiator/External MIX mode on the
port block that consists of the initiator ports and external ports.
Figure 42 (page 118)
mode. When the Standard mode is set to the ports, you have to connect the cables for both initiator
port and external port. However, if you set the Initiator/External MIX mode, you just need to connect
one cable, and you can use XP Continuous Access or XP Continuous Access Journal and remote
command device.
HP Confidential
shows the difference between the Standard mode and Initiator/External MIX
Mapping a Command Device as a Remote Command Device
Restriction
OPEN-V
1
Disable
96,000 Blocks (about 47 MB)
4 TB
Table 29 (page
63).
115).
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