Administrator Guide

NOTE: When a volume is preallocated, the Storage Center allocates all of the space on the volume to the server.
The Free Space of the volume is 0 MB and the Used/Active Space of the volume is the equal to the size of volume
on Storage Center. To keep the volume preallocated when it is formatted on the server, the SCSI UNMAP feature
must be disable on the server.
To schedule snapshot creation and expiration for the volume, apply one or more Snapshot Profiles by clicking Change located to
the right of Snapshot Profiles. The default Snapshot Profile is Daily.
To configure LUN settings, restrict mapping paths, configure multipathing, or present the volume as read-only, click Advanced
Mapping.
To prevent snapshots from being created by a Snapshot Profile, select the Pause Snapshot Creation checkbox.
To temporarily stop snapshot expiration, select the Pause Snapshot Expiration checkbox.
To allow space management snapshots to be combined into the next scheduled or manual snapshot, select the Allow Snapshots
to coalesce into active Snapshot checkbox.
To use specific disk tiers and RAID levels for volume data, select the appropriate Storage Profile from the Storage Profile drop-
down menu.
NOTE:
Using the Recommended Storage Profile allows the volume to take full advantage of data progression.
If more than one Storage Type is defined on the Storage Center, select the Storage Type to provide storage from the Storage
Type drop-down menu.
To change the volume QoS profile for the volume, select a profile from the Volume QoS Profile drop-down menu.
To change the group QoS profile for the volume, select a profile from the Group QoS Profile drop-down menu.
To enable Data Reduction, select the Compression checkbox and select either Compression or Deduplication with
Compression from the Data Reduction Profile drop-down menu.
11. Click OK.
Related concepts
Modifying Volumes
Create Multiple Volumes Simultaneously and Map Them to a Server
If a server requires additional storage and you do not want to use existing volumes, you can create and map multiple volumes to the server
in a single operation.
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere
Central.
2.
From the STORAGE menu, click Servers.
The Servers view is displayed.
3. Select the server to which to map new volumes.
4. Click (New), then select New Volume.
The New Volume dialog box opens.
5. In the Volume Count field, type the number of volumes to create.
6. Type a name for the volume in the Name field.
7. Select a unit of storage from the drop-down menu and enter the size for the volume in the Configured Size field. The available
storage units are bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB).
8. Select a parent folder for the volume from the Volume Folder drop-down menu.
9. To force all data written to the to the lowest tier, select the Import to Lowest Tier checkbox.
10. (Optional) Configure the remaining volume attributes as needed.
To allocate storage to the volume before the volume is mapped to the server, select the Preallocate Storage checkbox.
NOTE:
When a volume is preallocated, the Storage Center allocates all of the space on the volume to the server.
The Free Space of the volume is 0 MB and the Used/Active Space of the volume is the equal to the size of volume
on Storage Center. To keep the volume preallocated when it is formatted on the server, the SCSI UNMAP feature
must be disable on the server.
To schedule snapshot creation and expiration for the volume, apply one or more Snapshot Profiles by clicking Change located to
the right of Snapshot Profiles. The default Snapshot Profile is Daily.
To configure LUN settings, restrict mapping paths, configure multipathing, or present the volume as read-only, click Advanced
Mapping.
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Storage Center Server Administration