Global settings for IBM System Storage DS5000 or IBM DS4000 systems

Global settings apply across IBM® System Storage® DS5000 or IBM DS4000® systems.

Table 1 lists the global settings that can be used with SAN Volume Controller clusters.

Table 1. IBM System Storage DS5000 and DS4000 system global options and required settings
Option	IBM DS5000 or IBM DS4000 system default setting
Start flushing	80%
Stop flushing	80%
Cache block size	4 Kb

Attention: Do not modify these settings unless you are directed by the IBM Support Center

Depending on the IBM DS5000 or IBM DS4000 model, use a host type of IBM TS SAN VCE or SAN Volume Contr to establish the correct global settings for the SAN Volume Controller cluster. Either set this as the system default host type or, if partitioning is enabled, associate each SAN Volume Controller port with this host type.