D-Link ShareCenter Pro 1200, Руководство пользователя

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82 D-Link ShareCenter Pro 1200-05 User Manual
Section 3 - Configuration
iSCSI Target - iSCSI LUN
Introduction
:
In an iSCSI environment, LUNs are essentially numbered disk drives. An initiator negotiates with a target to establish connectivity
to a LUN; the result is an iSCSI connection that emulates a connection to a SCSI hard disk. The LUN can be created by the
following two methods.
Thin provisioning
:
The space is allocated only when needed. Advantages of Thin Provisioning on the ShareCenter Pro are as follows. With thin
provisioning, you can flexibly allocate disk space (on the iSCSI LUN) to the server applications allowing the storage capacity to
expand at any time regardless of the current storage size. The addition of storage space on the servers can easily be completed
for different operating systems each using their own iSCSI initiator. Thin provisioning allows efficient storage management since
the system administrator only has to monitor the storage capacity of the single ShareCenter Pro server rather than multiple
hard drives or tapes on other sub-storage systems. Also, over-allocation of space is allowed since the storage capacity of the
NAS can be expanded.
Pre-Allocate
:
The space will be allocated now. If you create a 50 GB LUN, then 50 GB will be immediately reserved for that LUN. (Note that
the creation will also take more time because of that process).