User's Manual

Using the Storage Management Service 173
[cachepolicy=<d | c>] Parameter (Optional)
Different controllers support different cache policies. See the online help for more information. The
following table indicates how to specify the [cachepolicy=<d | c>] parameter for each of the
cache policies.
[readpolicy=<ra| nra| ara| rc| nrc>] Parameter (Optional)
Different controllers support different read policies. See the online help for more information. The
following table indicates how to specify the [readpolicy=<ra| nra| ara| rc| nrc>] parameter for each of
the read policies.
[writepolicy=<wb| wt| wc| nwc>] Parameter (Optional)
Different controllers support different write policies. See the online help for more information. The
following table indicates how to specify the [writepolicy=<wb| wt| wc| nwc | fwb>] parameter for
each of the write policies.
Table 9-19. Cache Policy Parameters
Cache Policy cachepolicy=d | c Parameter Specification
Direct I/O cachepolicy=d
Cache I/O cachepolicy=c
Table 9-20. Read Policy Paramaters
Read Policy readpolicy=ra | ara | nra | rc | nrc
Parameter Specification
Read ahead readpolicy=ra
Adaptive read ahead readpolicy=ara
No read ahead readpolicy=nra
Read cache readpolicy=rc
No read cache readpolicy=nrc
Table 9-21. Write Policy Parameters
Write Policy writepolicy=wb | wt | wc | fwb | nwc
Parameter Specification
Write–back cache writepolicy=wb
Write–through cache writepolicy=wt
Write cache writepolicy=wc
Force write back writepolicy=fwb
No write cache writepolicy=nwc