Dell OpenManage Server Administrator Version 5.4 Manuel d'utilisateur télécharger pdf (Page 154)

152 Using the Storage Management Service

[writepolicy=<wb| wt| wc| nwc>] Parameter (Optional)

Different controllers support different write policies. Table 6-21 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

Example Syntax

For example, you may want to create a RAID-5 virtual disk on a PERC 3/QC

controller. See Dell OpenManage Online Help for information on read, write,

and cache policies are supported by this controller. For example, to create a

virtual disk with the following read, write, and cache policy:

• Read-ahead

• Write–through caching

• Cache I/O

Table 6-21. 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

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Dell OpenManage Server Administrator Version 5.4 Manuel d'utilisateur Page 154