Volume & LUN Snapshots - QNAP


Volume & LUN Snapshots - QNAP

Simplify Volume & LUN Restoration with Snapshots

Prevent data loss with snapshots

Snapshots allow your QNAP NAS to record the state of the system at any time. If an unexpected situation arises on your system, you can revert back to a previous state that the snapshot has recorded. The Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up and restore data back to any point of time to prevent loss of important data.

Volume & LUN Snapshots

Modern businesses need modern solutions for backup and restoration

With files and data being all-important for the long-term success of businesses, IT administrators need all-encompassing solutions for backing up and restoring both important files and the system itself. Businesses also need to be able to react quickly for backing up and restoring important files and system information, and also need the comfort of knowing that these backups can be easily replicated to other servers/NAS with no extra complications.

Modern businesses need modern solutions for backup and restoration

Benefits of Snapshots

The Storage Manager features numerous tools for taking snapshots and restoring files and data as necessary. Individual files can be easily restored if they are accidentally deleted or saved over, and the entire system can be easily reverted to a previous, healthier state if necessary. Snapshots can be taken by schedule or manually and then backed up to other NAS or servers in order to provide an all-encompassing backup solution.

  • Volume and LUN Snapshots Volume and LUN Snapshots

    QNAP’s block-based snapshot technology supports up to 1,024 snapshots for both volume and LUN in total, and 256 per volume or LUN.

  • Backup via RTRR/rsync Backup via RTRR/rsync

    Automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.

  • Snapshot Agent Utility Snapshot Agent Utility

    The Snapshot Agent utility is designed for servers to help create consistent snapshots for Microsoft® VSS and VMware® vSphere Client.

  • Snapshot Replica Snapshot Replica

    Efficiently replicates volume/LUN snapshots to a remote server by copying only the changes made. This can save time & bandwidth, and can be run manually or on a scheduled basis.

  • Snapshot Vault Snapshot Vault

    Centrally stores snapshots from multiple NAS. Remote snapshots can be cloned as a local volume for data access.

  • Snapshot Clone Snapshot Clone

    Quickly clone a volume or LUN snapshot from the Snapshot Vault as a volume or iSCSI LUN on a QNAP NAS without interrupting the current system operation.

What is the difference between Block-based LUN and File-based LUN?

File-based LUN and Block-based LUN are two different ways of sharing NAS storage using iSCSI LUN. File-based LUN creates image files in the file system then shares the space to other devices. As the image files are saved in the file system, its efficiency is limited. The newer Block-based LUN, however, can directly allocate space at the block level. Not only does it increase efficiency but also provides native support for virtualization applications, such as VAAI thin provisioning and storage reclaim and Microsoft® ODX, making Block-based LUN the ideal choice for iSCSI storage solution.

Why are Block-based LUN snapshots important to enterprises?

Block-based LUN are highly-efficient and ideal for virtualization environments, ensuring servers and virtual machines operate smoothly with additional storage space outside its local storage. Compared with File-based LUN snapshots, Block-based LUN snapshots provide faster snapshots backup and recovery, therefore helping to reduce disaster recovery time while also minimizing potential impact to a business.

Why is QNAP's snapshot support better?

Snapshots are a must-have feature for modern storage systems. QNAP's snapshots help protect your folders, files, and iSCSI LUNs. In the event of malware attacks or unwanted changes, your stored data can be quickly reverted and restored to a specific point in time to ensure continuity.

Check out the difference between QNAP 's snapshot support compared to competitor products.

Snapshot Application QNAP Competitors that use Btrfs
(S-brand, N-brand)
Other competitors
(W-brand, B-brand)
Block-based iSCSI LUN (Thick Provisioning and Thin Provisioning)
File-based iSCSI LUN (Thin Provisioning)
Protected by the volume snapshot, the process is done within seconds.
File-based iSCSI LUN (Thick Provisioning)
Protected by the volume snapshot, the process is done within seconds
Volume (Multiple Folders)
Shared Folder
With Snapshot Shared Folder
Availability All x86-based (Intel/AMD) models
*ARM-based models
Only available on selected models

*QTS 4.3.4 (or later) required.

Maximum Snapshots

NAS CPU Installed Memory Per NAS Per Volume/Block-based LUN
AMD ≧1GB 32 16
≧2GB 64 32
≧4GB 1024 256
Annapurna Labs ≧1GB 32 16
≧2GB 64 32
≧4GB 256 64
Intel ≧1GB 32 16
≧2GB 64 32
≧4GB 1024* 256

*TS-x51/x51+ series models only support up to 256 snapshots instead of 1024.

More Features

Snapshot shared folder

QNAP provides the “snapshot shared folder” mechanism that contains only one shared folder on a single volume, reducing the time needed to recover single folders to a few seconds. In a test conducted by QNAP, restoring a 300GB shared folder from a snapshot took around 30 minutes. Restoring the same shared folder from a snapshot shared folder only took 3 minutes.

Snapshot shared folder

Easy management

Snapshot Manager supports smart snapshot space management that helps control the number of snapshots, and allows starting Snapshot Replica tasks after specified local snapshots are taken. Users can also initiate Snapshot Manager in File Station for creating snapshots, and identifying differing content using the snapshot overview with Unify Snapshot Directory.

Easy management

Windows Previous Versions support

Snapshots enable Windows users to restore files directly from File Explorer simply by right clicking on files, saving time and effort without requiring help from IT administrators.

Windows Previous Versions support

Protecting Your Data from Ransomware

  Snapshot Replica RTRR Rsync NAS to NAS
Data backup scope Volume/LUN Shared folder Shared folder Shared folder
Transmission mode Block-based File-level file-based File-level block-based File-level block-based
Backup scheme Transmit only modified blocks Transmit new files Transmit new files but only with modified blocks
Backup schedule Scheduled Immediate/Scheduled Scheduled Scheduled
Encryption Support Support Support Support
Compression Support Support Support Support
Memory requirement At least 4GB RAM Unlimited Unlimited Unlimited
Remote system QNAP NAS QNAP NAS Rsync Server QNAP NAS
Application scenario
  • A large number of files with various file sizes
  •  Large files with frequent modifications such as virtual machine images or backup images.
  • Real-time file replication
  • File synchronization
  • Fast transmission on local network
  • Transmits large files with minor modifications
  • Transmit to a remote site over the Internet