Block-Based and File-Based LUNs

QTS supports two types of LUN: block-based and file-based.

Tip:

Block-based LUNs support more features and have faster read/write speeds. QNAP recommends using block-based LUNs whenever possible.

Feature

Block-based LUN

File-based LUN

Parent storage space

Storage pool

Thick volume

VAAI Full Copy

Supported

Supported

VAAI Block Zeroing

Supported

Supported

VAAI Hardware-Assisted Locking

Supported

Supported

VAAI Thin Provisioning and Space Reclaim

Supported

Not supported

Thin provisioning

Supported

Supported

QTS space reclamation

Supported (when using VAAI or the host is Windows Server 2012, Windows 8 or later)

Not supported

Microsoft ODX

Supported

Not supported

LUN export

Supported

Supported

LUN snapshots

Supported

Partially supported (You can take a snapshot of the LUN's parent volume.)

Read/write speeds

High

Medium to low