Configuration settings for IBM DS5000, IBM DS4000, and IBM DS3000 systems
The system configuration interface provides configuration settings and options that can be used with the Storwize® V3700 clustered system.
These settings
and options can have the following scope:
- System
- Logical
unit (LU)
- The Storwize V3700 system attempts to follow preferred ownership that is specified by the system. You can specify which controller (A or B) is used to perform I/O operations to a given LU. If the Storwize V3700 system can see the ports of the preferred controller and no error conditions exist, the Storwize V3700 system accesses that LU through one of the ports on that controller. Under error conditions, the ownership is ignored.
- You must enable the following options on any LUs that are mapped to the Storwize V3700 system:
- read caching
- write caching
- write cache mirroring
- You must not have caching without batteries that are enabled.