TS-251A - NAS QNAP - Free user manual and instructions
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| Product Type | NAS (Network Attached Storage) |
| Brand | QNAP |
| Model | TS-251A |
| Number of Bays | 2 |
| Processor | Intel Celeron N3160 4-core 1.6 GHz (burst up to 2.2 GHz) |
| Memory | 4 GB DDR3L RAM (expandable to 8 GB) |
| Storage Interface | SATA 6 Gb/s, 2.5 or 3.5 inch drives |
| RAID Support | JBOD, RAID 0, RAID 1, single disk |
| Dimensions (HxWxD) | 169 x 102 x 218 mm |
| Weight | 1.2 kg (without drives) |
| Power Supply | External 90W power adapter |
| Power Consumption | Approx. 17.5 W in operation, 0.5 W standby |
| Cooling | 1 x 7 cm fan (rear), smart fan control |
| Connectivity | 2 x Gigabit RJ45, 2 x USB 3.0, 1 x HDMI 1.4b, 1 x SD slot |
| HDMI Output | Yes, up to 4K resolution for multimedia streaming |
| Noise Level | Approx. 19.5 dB (A) in operation |
| Operating Temperature | 0 - 40 °C |
| File System | EXT4, supports NTFS, FAT32, HFS+ via external drives |
| Security | QNAP Security Counselor, encrypted volumes (AES-256), access control lists |
| Backup Solutions | QNAP Hybrid Backup Sync, Rsync, Cloud backup |
| Multimedia Features | DLNA, iTunes server, Plex Media Server support, transcoding |
| Maintenance | User-replaceable drives, RAM, and fan; firmware updates via web interface |
| Spare Parts & Repair | Hard drives and RAM can be replaced by user; fan replacement possible; warranty service available |
| General Information | Compatible with Windows, Mac, Linux; supports virtualization (Container Station, Virtualization Station) |
Frequently Asked Questions - TS-251A QNAP
What is the maximum storage capacity of QNAP TS-251A?
The TS-251A supports up to 2 internal drives of 3.5" or 2.5" SATA. Currently, drives up to 18 TB are available, giving a maximum raw capacity of 36 TB when using RAID 0.
Can I expand the RAM on the TS-251A?
Yes, the memory is upgradeable from the factory 4 GB DDR3L to up to 8 GB via a single SO-DIMM slot. Ensure you use compatible DDR3L 1.35V memory.
Does the TS-251A support 4K video playback?
Yes, it has an HDMI 1.4b output that can output 4K resolution at 30 fps. It also supports hardware transcoding for 4K video files.
How do I set up RAID 1 mirroring on my QNAP?
After installing two drives, initialize the NAS via QTS setup. In the 'Storage & Snapshots' app, create a new storage pool and select RAID 1 (mirroring). The system will then sync the drives.
Can I access my files remotely?
Yes, enable myQNAPcloud service on the device to access files via web browser or mobile apps. You can also use VPN or FTP for secure remote access.
What backup options does the TS-251A offer?
QNAP provides Hybrid Backup Sync for local, remote, and cloud backups. It supports Rsync, real-time backup, and scheduled backups to services like Google Drive, Dropbox, or Amazon S3.
Is the TS-251A compatible with Plex Media Server?
Yes, you can install Plex Media Server from the QNAP App Center. The device supports hardware transcoding for Plex, making it suitable for streaming media.
How do I replace a failed hard drive?
The TS-251A has tool-free drive trays. Simply press the release button, remove the old drive, insert a new one, and reseat the tray. If RAID 1 is used, the volume will rebuild automatically.
Can I use the TS-251A as a surveillance station?
Yes, install QVR Pro or Surveillance Station app from the App Center. It supports IP camera connection and recording, with up to 8 free channels (additional licenses for more).
What is the power consumption in standby?
The TS-251A consumes about 0.5 watts in sleep (standby) mode, and around 17.5 watts during typical operation with two drives.
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USER MANUAL TS-251A QNAP
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Product information
Brand : QNAP
Model : TS-251A
Category : NAS