This topic highlights changes to disk management for V5R4.
- Checklist 12: Upgrade load source disk unit with local mirroring protection explains the procedure for upgrading the capacity of the load source disk unit.
- Use the Start DASD Management Operation (QYASSDMO) API to reset the correct path for missing multipath connections.
- An external storage unit located on a storage area network (SAN) can now be configured as the load source unit. For more information, see External load source unit.
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To find other information about what's new or changed this release, see the Memo to users.