Administrator Guide

Table 12. PS Series Volumes (continued)
Callout Description
Thin provisioning allocates space based on how much is actually used, but gives the impression the entire
volume size is available. (For example, a volume with 100GB storage can be allocated to use only 20GB,
while the rest is available for other uses within the storage pool.) An offline volume indicates that it can no
longer be accessed by the iSCSI initiator until it has been set online.
For each volume, the group generates an iSCSI target name, which you cannot modify. An iSCSI target name includes a prefix, a
string, and the volume name. Initiators use the target name to connect to a volume. For example:
iqn.2001-05.com.equallogic:7-8b0900-6d0000000-001ebbc5d80sf0k0-db3
where:
prefix: iqn.2001-05.com.equallogic
string: 7-8b0900-6d0000000-001ebbc5d80sf0k0
volume name: db3
Each volume appears on the network as an iSCSI target. Hosts with iSCSI initiators use the volume's target name to connect to
the volume.
Each iSCSI volume supports a set of features and capabilities:
● Snapshots — To protect volume data from mistakes, viruses, or database corruption, you can use snapshots.
● Replication — To protect against disasters, you can replicate volume data from one group to another.
● Thin Provisioning — To manage storage capacity utilization on demand, you can use thin provisioning.
● Clones — To create a boot image, full system backup, or transfer a system to another person, you can use cloning.
● Volume Undelete — To restore mistakenly deleted volumes, you might be able to use volume undelete.
NOTE: The system permanently deletes volumes after 7 days, and sometimes sooner.
● Volume Folders — To organize volumes into folders for quick visual reference, you can use volume folders.
● Control Access to iSCSI Initiators — To protect your volumes from unauthorized and uncoordinated access by iSCSI
initiators, you can use access control policies.
● Control Access to Hosts (servers) — To prevent inadvertent corruption of the volume caused by multiple hosts writing to it
in an uncoordinated manner, enable multihost access to a volume.
Create a Volume
Create a volume to present a local unit of storage on a PS Series group.
Steps
1. Click the Storage view.
2. In the Storage pane, select a PS Series group.
3. Click the Storage tab.
4. In the Storage tab navigation pane, select Volumes.
5. In the right pane, click Create Volume. The Create Volume dialog box opens.
6. In the Name field, type a name for the volume.
7. In the Volume Folder pane, select the Volumes node or a parent folder for the volume.
8. In the Notes field, type any notes to associate with this volume.
9. In the Size field, type a size for the volume in megabytes (MB), gigabytes (GB), or terabytes (TB).
10. (Optional) Configure the remaining volume attributes as needed.
● To change the amount of space reserved for volume snapshots, type a percentage in the Snapshot Reserve field.
● To copy ACL settings from an existing volume, click Copy ACL, select a volume from the dialog box, and click OK.
● To change the storage pool assignment, click Change, select a storage pool from the dialog box, and click OK.
● To change the sector size of the volume, select a size from the Sector Size area.
● To enable thin provisioning, select the Thin Provisioned Volume checkbox:
○ In the Minimum Volume Reserve field, type the minimum reserve percentage of the volume.
○ In the In-Use Warning Limit field, type the in-use space warning limit percentage of the volume.
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PS Series Storage Array Administration