Dell External OEMR 2970 User Guide - Page 153

Use this parameter to specify a name for the virtual disk. For example, each of the write policies.

Page 153 highlights

Table 8-20. Read Policy Paramaters Read Policy Read ahead Adaptive read ahead No read ahead Read cache No read cache readpolicy=ra | ara | nra | rc | nrc Parameter Specification readpolicy=ra readpolicy=ara readpolicy=nra readpolicy=rc readpolicy=nrc [writepolicy=] Parameter (Optional) Different controllers support different write policies. See the online help for more information. The following table indicates how to specify the [writepolicy=] parameter for each of the write policies. Table 8-21. Write Policy Parameters Write Policy Write-back cache Write-through cache Write cache Force write back No write cache writepolicy=wb | wt | wc | fwb | nwc Parameter Specification writepolicy=wb writepolicy=wt writepolicy=wc writepolicy=fwb writepolicy=nwc [name=] Parameter (Optional) Use this parameter to specify a name for the virtual disk. For example: name=VirtualDisk1 NOTE: The CERC SATA 1.5/2s controller does not allow you to specify a virtual disk name. The virtual disk will be created with a default name. [spanlength=] Parameter (Required for RAID 50) Use this parameter to specify the number of physical disks to be included in each stripe. This parameter only applies to RAID 50 virtual disks. If you are not creating a RAID 50 virtual disk, do not specify this parameter. For example: spanlength=3 Using the Storage Management Service 153

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Using the Storage Management Service
153
[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.
[name=<string>] Parameter (Optional)
Use this parameter to specify a name for the virtual disk. For example:
name=VirtualDisk1
NOTE:
The CERC SATA 1.5/2s controller does not allow you to specify a virtual disk name. The virtual disk will be
created with a default name.
[spanlength=<n>] Parameter (Required for RAID 50)
Use this parameter to specify the number of physical disks to be included in each stripe.
This parameter
only applies to RAID 50 virtual disks. If you are not creating a RAID 50 virtual disk, do not specify this
parameter. For example:
spanlength=3
Table 8-20.
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 8-21.
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