QNAP TVS-472XT 4-Bay NAS Enclosure - Manual (Page 31)

Object Description Details
Volume A portion of storage space that
is used to divide up and manage
space on the NAS.
You can create volumes by dividing up storage pool
space, or using the space of a RAID group. QTS
offers three different volume types, with different
combinations of performance and flexibility.
Important
You must create at least one volume
before the NAS can start storing data.
iSCSI LUN
(logical unit
number)
A portion of storage space that
can be used by other NAS
devices, servers and desktop
computers using the iSCSI
protocol.
QTS offers two LUN types.
• Block-based LUN: Created from a storage pool. It
is similar to a volume, except that it has no file
system and must be linked to an iSCSI host.
• File-based LUN: Created on a volume. It is similar
to an ISO image file.
Shared folder A folder that is used for storing
and sharing files.
Shared folders are created on volumes. QTS
automatically creates a set of default shared folders.
You can create more shared folders and configure
permissions for each.
Global Settings
You can access global settings by clicking in the Storage & Snapshots window.
Storage Global Settings
Setting Description
RAID Resync Priority Specify the minimum speed of the following RAID operations:
• Rebuild
• Migration
• Scrubbing
• Sync
You can select one of the following priorities:
• Service First: QTS performs RAID operations at lower speeds in order
to maintain NAS storage performance.
• Default: QTS performs RAID operations at the default speed.
• Resync First: QTS performs RAID operations at higher speeds. Users
may notice a decrease in NAS storage performance while RAID
operations are in progress.
Important
This setting only affects RAID operation speeds when the
NAS is in use. When the NAS is idle, all RAID operations are
performed at the highest possible speeds.
QTS 4.4.x User Guide
Storage & Snapshots 30