Dell EMC OpenManage Command Line Interface Guide Version 9.1

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Parameter specification for creating and reconfiguring virtual disk

The following table displays how to specify the omconfig storage controller action=createvdisk parameters:

Table 1. Parameters And Types . The following table displays how to specify the parameter for creating and reconfiguring virtual disk.
Parameters Type
controller=id Required
raid=<c | r0 | r1 | r1c | r5 | r6 | r10 | r50 | r60> Required
size=<number | max | min> Required
pdisk=<connector:targetID,connector:targetID,.....> Required
[stripesize=<2k b| 4kb | 8kb | 16kb | 32kb | 64kb | 128kb>] Optional
[cachepolicy=<d | c>] Optional
[readpolicy=<ra | nra | ara | rc | nrc>] Optional
[writepolicy=<wb | wt | wc | nwc | fwb>] Optional
[name=<string>] Optional
[spanlength=<n>] parameter Optional

controller=id parameter

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 EMC OpenManage Online Help. The following table displays how to specify the raid=n parameter for each RAID level.

Table 2. Raid level and parameter specification . The following table displays how to specify the raid=n parameter for each RAID level.
RAID Level raid=n Parameter Specification
RAID-0 raid=r0
RAID-1 raid=r1
RAID-5 raid=r5
RAID-6 raid=r6
RAID-10 raid=r10
RAID-50 raid=r50
RAID-60 raid=r60

size=<number | max | min>

The following table displays how to specify the size=<number | max | min>

Table 3. Size Parameter.

The following table displays how to specify the size=<number | max | min>

size=<number | max | min> Parameter Specification Description
size=<n> Use this specification to indicate a specific size for the virtual disk. The virtual disk size is specified in b (bytes), m (megabytes), or g (gigabytes). For example, size=500m indicates that the virtual disk is 500 MB.
size=max To create a virtual disk that is the maximum size possible, specify size=max. When creating an RAID-50 virtual disk, this parameter is specified as size=max.
size=min To create a virtual disk that is the minimum size possible, specify size=min.

PDISKID=<connector:enclosureID:targetID | connector:targetID>

Use this parameter to specify the physical disks to be included in the virtual disk.

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.

stripesize=<2kb | 4kb | 8kb | 16kb | 32kb | 64kb | 128kb>

Different controllers support different stripe sizes. For more information on stripe sizes supported for a controller, see the OpenManage Online Help . All stripe sizes are specified in kilobytes. For example, when specifying 128 KB as the stripe size, type: stripesize=128kb

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 4. Cache Policy Parameters . The following table displays how to specify the [cachepolicy=<d | c>] parameter for each of the cache policies.
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 5. Disk Cache Policy Parameters . The following table indicates how to specify the [diskcachepolicy=<disabled | enabled>] parameter for each of the cache policies.
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 6. Read Policy Parameters . The following table displays how to specify the readpolicy=<ra | nra | ara | rc | nrc> parameter for each of the read policies.
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 7. Write Policy Parameters . The following table displays how to specify the writepolicy=<wb | wt | wc | nwc | fwb> parameter for each of the write policies.
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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