Users Guide

When reconguring a virtual disk, you must specify all physical disks to include in the recongured virtual disk. The physical disk
specication applies to physical disks in the original virtual disk and continues in the recongured virtual disk and to any new physical
disks being added to the recongured 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
Dierent controllers support dierent cache policies. The following table displays how to specify the [cachepolicy=<d | c>] parameter
for each of the cache policies.
Table 164. Cache Policy Parameters
Cache Policy cachepolicy=d | c Parameter Specication
Direct I/O cachepolicy=d
Cache I/O cachepolicy=c
Diskcachepolicy=<disabled | enabled>
Dierent controllers support dierent disk cache policies. The following table indicates how to specify the [diskcachepolicy=<disabled
| enabled>] parameter for each of the cache policies.
Table 165. Disk Cache Policy Parameters
Disk Cache Policy diskcachepolicy=disabled | enabled Parameter Specication
Disabled diskcachepolicy=disabled
Enabled diskcachepolicy=enabled
Readpolicy=<ra | nra | ara | rc | nrc>]
Dierent controllers support dierent read policies. The following table displays how to specify the readpolicy=<ra | nra | ara | rc |
nrc> parameter for each of the read policies.
Table 166. Read Policy Parameters
Read Policy readpolicy=ra | ara | nra | rc | nrc Parameter Specication
Read ahead readpolicy=ra
Adaptive read ahead readpolicy=ara
No read ahead readpolicy=nra
Read cache readpolicy=rc
No read cache readpolicy=nrc
Writepolicy=<wb | wt | wc | nwc>
Dierent controllers support dierent write policies. The following table displays how to specify the writepolicy=<wb | wt | wc | nwc
| fwb> parameter for each of the write policies.
Table 167. Write Policy Parameters
Write Policy writepolicy=wb | wt | wc | fwb | nwc Parameter Specication
Write-back cache writepolicy=wb
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