User manual

FIBRE-to-SAS/SATA RAID SUBSYSTEM
User Manual
99
Chapter 7 Logical Volume Management
Logical Volumes are required for assigning mappings to Hosts. A Logical Volume
can be expanded or re-assigned to a different Host after it has been created.
A Logical Volume can be created either as a private volume or as a global volume.
Global Logical Volumes:
Global logical volumes can be mapped to user-specified ports. Once a global
volume is mapped to a port, all hosts that log into that port can access the logical
volume at the configured LUN for this port. Hosts that are not logged into a
mapped port will not be able to access the global volume.
Private Logical Volumes:
Private logical volumes can be mapped to user-specified ports AND hosts. Private
volumes can have a set of ports enabled, at which they can be accessible by
selected hosts only. Private volumes are only accessible by hosts that have been
mapped to that volume at a specified LUN. In addition, the host also needs to be
logged into a port that has been enabled for the private volume.
Hosts that are not mapped to a private volume will not be able to access the
private volume irrelevant of the login port.
Mapping hosts to volumes can be performed on the Logical Volume Functions Î
Host Mapping screen.
WARNING! Any file system on a mapped Logical Volume may be
lost if it is re-mapped to a different host.
The following functions are available with respect to Logical Volumes:
 View - see the status of a Logical Volume
 Create - create a new Logical Volume
 Modify, Delete - modify, expand or delete Logical Volumes
 Host Mapping - assign hosts to logical volumes