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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Create RAID Virtual Disk (Free Extent Base Select)

Description

This command creates a virtual disk in the free space of a disk group.

Syntax

create virtualDisk diskGroup="diskGroupName" userLabel="virtualDiskName" [freeCapacityArea=freeCapacityIndexNumber] [capacity=virtualDiskCapacity]
                                 [owner=(0 | 1)] [cacheReadPrefetch=(TRUE | FALSE)] [segmentSize=segmentSizeValue] [usageHint=(fileSystem | dataBase | multiMedia)]
                                 [dssPreAllocate=(TRUE | FALSE)] [securityType=(none | capable | enabled)] [dataAssurance=(none | enabled)]

Parameters

Parameter Description
diskGroup Sequence number of the disk group in which to create the new virtual disk. (To determine the sequence numbers of the disk groups in your storage array, enter the show storageArray Profile command.)
userLabel Name for the new virtual disk. You must put quotation marks (" ") around the new virtual disk name.
  • NOTE: You can use any combination of alphanumeric characters, hyphens, and underscores for the names. Spaces are not allowed. Command names can have a maximum of 30 characters. If you exceed the maximum character limit, replace square brackets ([ ]) with angle brackets (< >) to overcome this limitation.
freeCapacityArea Index number of the free space in an existing disk group to use to create the new virtual disk. Free capacity is defined as the free capacity between existing virtual disks in a disk group. For example, a disk group might have the following areas: virtual disk 1, free capacity, virtual disk 2, free capacity, virtual disk 3, free capacity. To use the free capacity following virtual disk 2, specify: 
freeCapacityArea=2
Use the show diskGroup command to determine if the free capacity area exists.
capacity Size of the virtual disk that you are adding to the storage array. Size is defined in units of bytes, KB, MB, GB, or TB.
  • NOTE: Add a space between the last digit and the size (bytes, KB, MB, or GB) for values greater than 9. If you do not specify a capacity, all the available physical disk capacity in the disk group is used. If you do not specify the capacity unit, bytes is used as the default unit.
owner RAID controller module that owns the virtual disk. Valid RAID controller module identifier values are 0 and 1. The identifier value is 0 for the RAID controller module on the top and 1 for the RAID controller module on the bottom when viewed from the rear of the enclosure. If you do not specify an owner, the RAID controller module firmware determines the owner.
  • NOTE: The owner parameter defines which RAID controller module owns the virtual disk. The preferred RAID controller module ownership of a virtual disk is the RAID controller module that currently owns the disk group.
cacheReadPrefetch The setting to turn on or turn off cache read prefetch. To turn on cache read prefetch, set this parameter to TRUE. To turn off cache read prefetch, set this parameter to FALSE.
segmentSize Amount of data (in kilobytes) that the RAID controller module writes on a single physical disk in a virtual disk before writing data on the next physical disk. Valid values are 8, 16, 32, 64, 128, 256, or 512. For information about the segmentSize parameter, see Using The Auto Configure Command.
usageHint The settings for both the cacheReadPrefetch parameter and the segmentSize parameter should be the default values. The default values are based on the typical I/O usage pattern of the application that is using the virtual disk. Valid values are fileSystem, dataBase, or multiMedia.
dssPreAllocate The setting to make sure that reserve capacity is allocated for future segment size increases. The default value is TRUE.
securityType The setting to specify the security level when creating the disk groups and all associated virtual disks.
  • none—The disk group and virtual disks are not secure.
  • capable—The disk group and virtual disks are capable of having security set, but security has not been enabled.
  • enabled—The disk group and virtual disks have security enabled.
For information about securityType, see Security Type.
dataAssurance The setting to specify that a disk pool has data assurance protection to make sure that the data maintains its integrity. When you use this parameter, only protected physical disks can be used for the disk pool.
These settings are valid:
  • none – The disk pool does not have data assurance protection.

  • enabled – The disk pool has data assurance protection. The disk pool supports protected information and is formatted with protection information enabled.

    The default value is none.

    • NOTE: This option is only valid for enablement, if the drives support DA.

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