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

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Create RAID Virtual Disk (Automatic Physical Disk Select)

Description

This command creates a disk group across the storage array physical disks, and a new virtual disk in the disk group. The RAID controller modules in the storage array choose the physical disks to include in the virtual disk.

Syntax

create virtualDisk physicalDiskCount=numberOfPhysicalDisks
                                 diskGroupUserLabel="diskGroupName"
                                 raidLevel=(0 | 1 | 5 | 6)
                                 userLabel=”virtualDiskName”
                                 physicalDiskMediaType=(HDD | SSD | unknown | allMedia)
                                 [physicalDiskType=(SAS)]
                                 [capacity=virtualDiskCapacity]
                                 [owner=(0 | 1)]
                                 [cacheReadPrefetch=(TRUE | FALSE)]
                                 [segmentSize=segmentSizeValue]
                                 [usageHint=(fileSystem | dataBase | multiMedia)]
                                 [enclosureLossProtect=(TRUE | FALSE)]
                                 [drawerLossProtect=(TRUE | FALSE)]
                                 [dssPreAllocate=(TRUE | FALSE)]
                                 [securityType=(none | capable | enabled)]
                                 [dataAssurance=(none | enabled)]

Parameters

Parameter Description
physicalDiskCount Number of unassigned physical disks to use in the disk group.
  • NOTE: The physicalDiskCount parameter enables you to choose the number of physical disks to use in the disk group. You do not need to specify the physical disks by enclosure ID and slot ID. The RAID controller modules choose the specific physical disks to use for the disk group.
diskGroupUserLabel The alphanumeric identifier (including – and _) that you want to give the new disk group. Enclose the disk group identifier in double quotes (" ").
raidLevel RAID level of the disk group that contains the virtual disk. Valid values are 0, 1, 5 or 6.
userLabel Name to give to the new virtual disk. You must put quotation marks (" ") around the new virtual disk name.
physicalDiskType Specifies the type of physical disk to use in the virtual disk. You cannot mix physical disk types in the virtual disk. The valid physical disk type is SAS.
capacity The 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: A space must be added 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 The 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.
cacheReadPrefetch The setting to turn on or turn off cache read prefetch. To turn off cache read prefetch, set this parameter to FALSE. To turn on cache read prefetch, set this parameter to TRUE.
segmentSize Amount of data (in KB) 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.
enclosureLossProtect Specifies that enclosure loss protection is enforced when creating the disk group. To enforce enclosure loss protection, set this parameter to TRUE. The default setting is FALSE. For information about the enclosureLossProtect parameter, see Enclosure Loss Protection.
drawerLossProtect The setting to enforce drawer loss protection when you create the replication repository disk group. To enforce drawer loss protection, set this parameter to TRUE. The default value is FALSE.
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.
usageHint The setting for both cacheReadPrefetch parameter and the segmentSize parameter to be 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.
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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