Reference Guide

When reconfiguring a virtual disk, you must specify all physical disks to include in the reconfigured virtual
disk. The physical disk specification applies to physical disks in the original virtual disk and continues in
the reconfigured virtual disk and to any new physical disks being added to the reconfigured virtual disk.
Some controllers allow you to remove a physical disk from a virtual disk. In this case, do not specify to
remove the physical disk.
The pdisk=<PDISKID> parameter indicates a physical disk by specifying either
connector:enclosureID:targetID or connector:targetID.
Cachepolicy=<d | c>
cachepolicy=<d | c>] Parameter
Different controllers support different cache policies. The following table displays how to specify the
[cachepolicy=<d | c>] parameter for each of the cache policies.
Table 100. Cache Policy Parameters
Cache Policy cachepolicy=d | c Parameter Specification
Direct I/O cachepolicy=d
Cache I/O cachepolicy=c
Diskcachepolicy=<disabled | enabled>
Different controllers support different disk cache policies. The following table indicates how to specify
the [diskcachepolicy=<disabled | enabled>] parameter for each of the cache policies.
Table 101. Disk Cache Policy Parameters
Disk Cache Policy diskcachepolicy=disabled | enabled Parameter
Specification
Disabled diskcachepolicy=disabled
Enabled diskcachepolicy=enabled
Readpolicy=<ra | nra | ara | rc | nrc>]
Different controllers support different read policies. The following table displays how to specify the
readpolicy=<ra | nra | ara | rc | nrc> parameter for each of the read policies.
Table 102. Read Policy Parameters
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
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