QNAP TVS-472XT 4-Bay NAS Enclosure - Manual (Page 125)

Snapshot Storage Limitations
The maximum number of snapshots a NAS can store is determined by the NAS CPU manufacturer or NAS
series, and installed memory.
Tip
For more information on NAS hardware specifications, go to https://www.qnap.com .
NAS CPU or Model Installed Memory Maximum Snapshots
per NAS
Maximum Snapshots
per Volume or LUN
• Intel CPU
• AMD CPU
≥ 1 GB 32 16
≥ 2 GB 64 32
≥ 4 GB 1024 256
• Annapurna Labs CPU
• TS-1635AX
• TS-328
• TS-128A, TS-228A
• TS-x51, TS-x51+
≥ 1 GB 32 16
≥ 2 GB 64 32
≥ 4 GB 256 64
Snapshot Creation
Taking a Snapshot
1. Go to Storage & Snapshots > Storage > Storage/Snapshots .
2. Select a thick volume, thin volume, or block-based LUN.
Tip
To take a snapshot of a file-based LUN, take a snapshot of its parent volume.
3. Click Snapshot and then select Take a Snapshot.
The Take a Snapshot window opens.
4. Optional: Specify a name.
5. Optional: Choose to keep the snapshot permanently.
If selected, QTS retains the snapshot indefinitely. If not selected, QTS may delete the snapshot
according to the snapshot retention policy set for the volume or LUN.
For more information, see Snapshot Retention Policy .
6. Select the LUN snapshot type.
This setting is only available when taking a snapshot of a block-based LUN.
Type Description
Crash consistent The snapshot records the state of the data on the
LUN.
QTS 4.4.x User Guide
Storage & Snapshots 124