Concept Guide

Table 95. 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 96. 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
writepolicy=<wb | wt | wc | nwc>]
Different controllers support different write policies. The following table displays how to specify the
writepolicy=<wb | wt | wc | nwc | fwb> parameter for each of the write policies.
Table 97. 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
Controller=id
Specify the controller ID as reported by the omreport storage controller command. For example,
controller=2
Raid=<c | r0 | r1 | r1c | r5 | r6 | r10 | r50 | r60>
Use the raid=<c| r0 | r1| r1c | r5 | r6 | r10 | r50 | r60> parameter to specify a RAID level for a virtual disk.
Different controllers support different RAID levels. For more information about RAID levels a controller
supports and for general information about RAID levels, see the Dell OpenManage Online Help. The
following table displays how to specify the raid=n parameter for each RAID level.
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