Create volume — Define volume characteristics

Use this page to define the properties for the specified volumes.

Introduction

The most efficient method of allocating storage is in exact multiples of 1 GB binary (one extent) or in increments of 2 million blocks.

Note: If you plan on working with remote mirror and copy functions associated with an Enterprise Storage System (ESS), ensure that you select Standard Open Systems - ESS Sizes as your volume type.

Menu path

Real-time manager or Simulated manager > Configure storage > Open Systems > Volumes – Open systems > Select Action: Create... > Go

Fields

RAID type

The supported or available RAID types (for example, RAID 5 and RAID 10).

Physical capacity for the DS6000™ series can be configured as RAID 5, RAID 10, or a combination of both. RAID 5 can offer excellent performance for most applications, while RAID 10 can offer better performance for selected applications, in particular, high random write content applications in the open systems environment.

Volume type

The type of volume.

Standard Open Systems - DS Sizes

Supported DS logical volume sizes range from 1 to 2048 binary gigabytes (1GB = 2³⁰ bytes). This allocation uses the storage capacity of DS systems most efficiently.

Standard Open Systems - ESS Sizes

Supported Enterprise Storage System (ESS) logical volume sizes range from 0.1 to 982.2 decimal gigabytes (1GB = 10⁹ bytes). You can calculate the exact number of 512 byte blocks as INT((INT(GBx10⁹/512)+63)/64)x64. The size of the volume that is created on the ESS is identical to the size of the volume that is created on the DS.

Standard Open Systems - Blocks

Supported block logical volume sizes range from 1 to 4 binary gigablocks (1 gigablock = 2³⁰ 512-byte blocks). If a specified size matches a supported DS or ESS logical volume size, the volume is identified as a DS or ESS logical volume, even though it is created by specifying the blocks volume type.

iSeries - Protected

Supported iSeries logical volume sizes are expressed in decimal gigabytes (1GB = 10⁹ bytes):

A0 (8.6 GB)
A02 (17.5 GB)
A04 (70.5 GB)
A05 (35.1 GB)
A06 (141.12 GB)
A07 (282.25 GB)

iSeries - Unprotected

Supported iSeries logical volume sizes are expressed in decimal gigabytes (1GB = 10⁹ bytes):

A81 (8.6 GB)
A82 (17.5 GB)
A84 (70.5 GB)
A85 (35.1 GB)
A86 (141.12 GB)
A87 (282.25 GB)

Enable write cache with mirroring

The option to create mirrored open systems volumes. Not selecting this option increases throughput, but at the risk of data loss. You cannot modify this selection after you have created the volume.

Select volume groups

The volume groups that you want to associate with these volumes. The default volume groups that are applicable to the selected volume type are displayed. A check in the check box activates the volume groups for your selection.

Create new group button

Clicking this button opens the first panel of the Create volume group wizard. The wizard directs you through the steps to provide the information that you need to create a new volume group. After you create a new volume group, the system refreshes and the volume group that you created is added to the list of volume groups that you can select for the volume.