HP MSA 2040 CLI Reference Guide

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create vdisk 67

create vdisk

Description Creates a vdisk using the specified RAID level, disks, and spares. When you create a vdisk, all its

disks must be the same type: either SAS SSD, enterprise SAS, or midline SAS.

For each RAID level, the minimum and maximum numbers of disks supported are:

• NRAID: 1

• RAID 0: 2–16

• RAID 1: 2

• RAID 3: 3–16

• RAID 5: 3–16

• RAID 6: 4–16

• RAID 10: 4–16

• RAID 50: 6–32

For best practices for creating vdisks, see the SMU Reference Guide.

Syntax

create vdisk

level nraid|raid0|r0|raid1|r1|raid3|r3|raid5|r5|raid6|r6|raid10|r10

|raid50|r50

disks

[assigned-to a|b|auto]

[spare

disks

]

[chunk-size 16k|32k|64k|128k|256k|512k]

[mode online|offline]

name

Parameters level nraid|raid0|r0|raid1|r1|raid3|r3|raid5|r5|raid6|r6|raid10|r10

|raid50|r50

Specifies the RAID level.

disks

IDs of the disks to include in the vdisk. RAID 10 requires a minimum of two RAID-1 sub-vdisks each

having two disks. RAID 50 requires a minimum of two RAID-5 sub-vdisks each having three disks.

For disk syntax, see "Command syntax" (page 20).

assigned-to a|b|auto

Optional. For a system operating in Active-Active ULP mode, this specifies the controller to own the

vdisk. To let the system automatically load-balance vdisks between controllers, use auto or omit this

parameter. In Single Controller mode, this parameter is ignored; the system automatically

load-balances vdisks in anticipation of the insertion of a second controller in the future.

spare

disks

Optional. IDs of 1–4 dedicated spares to assign to a RAID 1, 3, 5, 6, 10, or 50 vdisk. For disk

syntax, see "Command syntax" (page 20).

chunk-size 16k|32k|64k|128k|256k|512k

Optional. The amount of contiguous data, in KB, that is written to a vdisk member before moving to

the next member of the vdisk. For RAID 50, this option sets the chunk size of each RAID-5 subvdisk.

The chunk size of the RAID-50 vdisk is calculated as: configured-chunk-size x (subvdisk-members - 1).

For NRAID and RAID 1, chunk-size has no meaning and is therefore not applicable. The default

size is 512k.

mode online|offline

Optional. Specifies whether the vdisk is initialized online or offline.

• online: Enables you to use the vdisk immediately after creating it while it is initializing.

Because online uses the verify method to create the vdisk, it takes longer to complete initializing

than offline. Online initialization is fault-tolerant. This option is the default.

• offline: You must wait for the vdisk initialization process to finish before using the vdisk;

however, offline takes less time to complete initializing than online.