Step 3: Selecting Disks; Step 4: Defining Volumes - HP P2000 Reference Manual

• Assign to. If the system is operating in Active-Active ULP mode, optionally select a controller to be
the preferred owner for the vdisk. The default, Auto, automatically assigns the owner to
load-balance vdisks between controllers. If the system is operating in Single Controller mode, the
Assign to setting is ignored and the system automatically load-balances vdisks in anticipation of the
insertion of a second controller in the future.
• RAID Level. Select a RAID level for the vdisk.
• Number of sub-vdisks. For a RAID- 1 0 or RAID-50 vdisk, optionally change the number of sub-vdisks
that the vdisk should contain.
• Chunk size. For RAID 3, 5, 6, 10, or 50, optionally set the amount of contiguous data 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 sub-vdisk. 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 disabled. The default and maximum size is 64KB.
2. Click Next to continue.

Step 3: Selecting disks

Select disks to include in the vdisk. The Disk Selection Sets table has one row for each sub-vdisk in a
RAID- 1 0 or RAID-50 vdisk, or a single row for a vdisk having another RAID level. The table also has a
SPARE row where you can assign dedicated spares to the vdisk. In each row, the Disks field shows how
many disks you can, and have, assigned. As you select disks, the table shows the amount of storage space
in the vdisk. For descriptions of storage-space color codes, see
page 33.
The Enclosures Front View table shows all disks in all enclosures. The Graphical tab shows disk information
graphically; the Tabular tab shows disk information in a table. Disks you select are highlighted and
color-coded to match the rows in the Disk Selection Sets table. Based on the type of disk you select first
(SAS or SATA), only available disks of that type become selectable; you cannot mix SAS and SATA disks in
a vdisk.
To select disks and spares
1. Select disks to populate each vdisk row. When you have selected enough disks, a checkmark appears
in the table's Complete field.
2. Optionally select up to four dedicated spares for the vdisk.
3. Click Next to continue.

Step 4: Defining volumes

A volume is a logical subdivision of a vdisk and can be mapped to controller host ports for access by
hosts. A mapped volume provides the storage for a file system partition you create with your operating
system or third-party tools. The storage system presents only volumes, not vdisks, to hosts.
You can create multiple volumes with the same base name, size, and default mapping settings. If you
choose to define volumes in this step, you will define their mapping settings in the next step.
To define volumes
1. Set the options:
• Specify the number of volumes to create. If you do not want to create volumes, enter 0. After
changing the value, press Tab.
• Optionally change the volume size. The default size is the total space divided by the number of
volumes.
• Optionally change the base name for the volumes. A volume name is case sensitive; cannot already
exist in a vdisk; cannot include a comma, double quote, or backslash; and can have a maximum of
20 bytes.
2. Click Next to continue.
58 Provisioning the system
About storage-space color codes on