Maximizing Efficiency Through Data Replication Manager Data Movement Application Notes

Procedures and Examples
30 Application Notes - Maximizing Efficiency Through Data Replication Manager Data Movement
I 2. Show the initial conditions of the LUN with data to be moved. Use the command:
SHOW UnitNumber
Example: show d1
Example Display 21 shows a sample output of this command.
Example Display 21
LUN Uses Used by
------------------------------------------------------------------------------
D1 DISK10000
LUN ID: 6000-1FE1-0000-1530-0009-9231-4229-009A
NOIDENTIFIER
Switches:
RUN NOWRITE_PROTECT READ_CACHE
READAHEAD_CACHE WRITEBACK_CACHE
MAX_READ_CACHED_TRANSFER_SIZE = 32
MAX_WRITE_CACHED_TRANSFER_SIZE = 32
Access:
HOSTA
State:
ONLINE to the other controller
NOPREFERRED_PATH
Size: 17769177 blocks
Geometry (C/H/S): ( 5258 / 20 / 169 )
I 3. Enable access to the other storage subsystem (in this example, it is the target site or BUILDNGB).
Refer to callout 1 on Figure 11. Use the command:
SET UnitNumber ENABLE_ACCESS_PATH=HostIDs
Example: set d1 enable_access_path=BUILDNGBa,BUILDNGBb,BUILDNGBc,BUILDNGBd
Example Display 22 shows a sample warning message that appears.
Example Display 22
Warning 1000: Other host(s) in addition to the one(s) specified can still
access this unit. If you wish to enable ONLY the host(s)
specified, disable all access paths (DISABLE_ACCESS=ALL), then
again enable the ones specified
I 4. Set LUN D1 to a preferred path with the following command:
SET UnitNumber PREFERRED_PATH=THIS_CONTROLLER
Example: set d1 preferred_path=this_controller
T 5. View the initial conditions at the target site. Use the command:
SHOW UNITS
The message “No LUNs” appears in this case because none have been created.
T 6. Prepare a LUN on the target subsystem (refer to callout 2 on Figure 11). Use the commands:
INITIALIZE ContainerName
Example: initialize disk10000
ADD UNIT UnitNumber ContainerName DISABLE_ACCESS_PATH=ALL
Example: add unit d1 disk10000 disable_access_path=all