Workflow For Adding And Removing Cache Memory; Workflow For Adding Control Memory; Workflow For Removing Control Memory - Hitachi G200 User Manual

be performed, first split any pairs in COPY status, and then resynchronize the
pairs when the cache or control memory operation is completed.

Workflow for adding and removing cache memory

Use the following workflow to add or remove cache memory in a storage
system in which TrueCopy pairs already exist:
1 Identify the status of the TrueCopy volumes in the storage system.
.
2 If a TrueCopy volume is in the COPY status, wait until the status changes
.
to PAIR, or split the TrueCopy pair.
Do not add or remove cache memory when any volumes are in the COPY
status.
3 When the status of all volumes has been confirmed, cache memory can
.
be added to or removed from the storage system by your service
representative. Contact Hitachi Data Systems customer support for
adding or removing cache memory.
4 After the addition or removal of cache memory is complete, resynchronize
.
the pairs that you split in step 2.

Workflow for adding control memory

Use the following workflow to add control memory to a storage system in
which TrueCopy pairs already exist:
1 Identify the status of the TrueCopy volumes in the storage system.
.
2 If a TrueCopy volume is in the COPY status, wait until the status changes
.
to PAIR, or split the TrueCopy pair.
Do not add control memory when any volumes are in the COPY status.
3 When the status of all volumes has been confirmed, control memory can
.
be added to the storage system by your service representative. Contact
Hitachi Data Systems customer support for adding or removing cache
memory.
4 After the addition of control memory is complete, resynchronize the pairs
.
that you split in step 2.

Workflow for removing control memory

Use the following workflow to remove control memory:
Note: For the following cases, you do not need to delete the TC pairs in step
2 because there is no dedicated area for TC, such as bit map areas:
• VSP G200: Control memory is added in Extension2.
• VSP G400, G600, G800: Control memory is added in Extension4.
1 Identify the status of all volumes.
.
2 If a volume is used by a TrueCopy pair, delete the TrueCopy pair.
.
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
Planning for TrueCopy
3-3