Migrating data between storage units
Migrating data between storage units requires the use of Global Copy or IBM
TotalStorage Metro Mirror. Perform this process to migrate data between storage
units.
1. Establish paths between all Site A LSSs and Site B LSSs.
2. Establish all necessary volume pairs between the Site A storage units and the
Site B storage units. You can use either the Global Copy or the IBM
TotalStorage Metro Mirror feature.
3. Convert the pairs to IBM TotalStorage Metro Mirror after the bulk copy is
complete if you use Global Copy.
4. Ensure that all remote mirror and copy volumes are in duplex state.
5. Quiesce the applications before you switch to the new volumes.
6. End all remote mirror and copy pairs across all storage units.
7. End all theremote mirror and copy paths from the Site A storage units to the
Site B storage units.
8. Resume all applications that point to devices at the Site B storage units.
Moving workloads when migrating data between storage units
Moving workloads when migrating data between storage units requires the use of
Global Copy or IBM TotalStorage Metro Mirror. Perform this process to move
workloads between storage units.
1. Establish paths between all Site A LSSs and the Site B LSSs.
2. Establish all necessary volume pairs between the Site A storage units and the
Site B storage units. You can use either Global Copy or IBM TotalStorage
Metro Mirror.
If you use Global Copy, convert the pairs to IBM TotalStorage Metro Mirror
after the bulk copy is complete.
3. Ensure that all remote mirror and copy volumes are in duplex state.
4. Quiesce all of the applications.
5. End all remote mirror and copy pairs across all ESSs.
6. End all remote mirror and copy paths.
7. Establish remote mirror and copy paths from the Site B storage units to the
Site A storage units.
8. Establish all IBM TotalStorage Metro Mirror pairs from the Site B storage units
to the Site A storage units.
9. Suspend all remote mirror and copy pairs. This causes the storage units to
maintain a changed-track bitmap for all suspended remote mirror and copy
primary volumes.
10. Resume all the Site A applications. The Site A applications use the Site B
storage units disks.
11. Resume all the Site A applications that use the Site A storage units disks.
Offloading workloads when migrating data between storage units
Offloading workloads when migrating data between storage units requires the use
of Global Copy or IBM TotalStorage Metro Mirror.
1. Establish paths between all Site A LSSs and Site B LSSs.
2. Establish all critical volume pairs between Site A storage units and Site B
storage units, using either Global Copy or IBM TotalStorage Metro Mirror.
138 DS8000 User’s Guide
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