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The HS-251, powered by dual-core Intel Celeron 2.41 GHz processor, was created as a silent NAS solution that allows users to enjoy files and media with no distractions, providing a perfect match for home theater enthusiasts and audiophiles looking to maximize their audiovisual experience and users who wish to constantly run their systems without any background noise. Coupled with the support of HDMI connectivity for 1080p video playback and hardware transcoding capability, the HS-251 is an ideal companion at home for multimedia entertainment. Being fanless, the HS-251 has no internal moving parts for improved reliability and remains clean and dust-free even after long-term usage. The HS-251 is excellent used with SSDs or WD Red and Seagate NAS drives as a reliable storage solution.
| Product Description | QNAP HS-251 Turbo NAS - NAS server - 4 TB | Device Type | NAS server | Host Connectivity | Gigabit Ethernet | Total Storage Capacity | 4 TB | Installed Devices / Modules Qty | 2 (installed) / 2 (max) | Dimensions (WxDxH) | 30.2 cm x 22 cm x 4.13 cm | Weight | ) | Processor | 1 x Intel Celeron 2.41 GHz (Dual-Core) | Storage Controller | RAID SATA 6Gb/s RAID RAID 0, 1, JBOD | Hard Drive | 2 x 2 TB | Networking | 10Mb LAN, 100Mb LAN, GigE | RAM | 1 GB | Power | AC 120/230 V | Storage Operating System | QNAP QTS 4.1 | System Requirements | UNIX, Linux, Microsoft Windows XP or later, Apple MacOS X or later, Microsoft Windows Server 2003 or later |
General | |
| Device Type | NAS server |
| Host Connectivity | Gigabit Ethernet |
| Total Storage Capacity | 4 TB |
| Installed Devices / Modules Qty | 2 (installed) / 2 (max) |
| Width | 30.2 cm |
| Depth | 22 cm |
| Height | 4.13 cm |
| Weight | ) |
| Built-in Devices | Led panel |
Processor / Memory | |
| Processors Installed | 1 x Intel Celeron 2.41 GHz |
| Number of Cores | Dual-Core |
| Max Supported Qty | 1 |
| RAM | 1 GB DDR3L |
| Flash Memory Installed | 512 MB |
Storage Controller | |
| Type | RAID |
| Interface Type | SATA 6Gb/s |
| RAID Level | RAID 0, RAID 1, JBOD |
Hard Drive | |
| Type | HDD - hot-swap |
| Capacity | 2 x 2 TB |
Networking | |
| Data Link Protocol | 10Mb LAN, 100Mb LAN, GigE |
| Network / Transport Protocol | TCP/IP, iSCSI, SMTP, FTP, DHCP, Bonjour, SMB, DDNS |
| Remote Management Protocol | SNMP 2, Telnet, SNMP 3, HTTP, HTTPS, TFTP, SSH |
| Network Services Compatibility | Microsoft Active Directory (AD), Apple Bonjour Protocol, DHCP, DDNS, Microsoft CIFS, Network File System (NFS), FTP, FTPS, Server Message Block (SMB), Apple File Protocol (AFP), HTTP, HTTPS, Web-based Distributed Authoring and Versioning (WebDAV) |
| Features | Trunking, LDAP support, wake on LAN (WOL), Syslog support, manageable, E-mail alert, print server, IPv6 support, IP address filtering, video server, firmware upgradable, proxy server, backup server, download client, file sharing, event log, Trivial File Transfer Protocol (TFTP) support, Access Control List (ACL) support, SSH support, iTunes server, Jumbo Frames support, DHCP server, FTP server, SMS alert, BitTorrent Client, UPnP Media Server, bandwidth control, IPv4 support, surveillance station, teaming support, DLNA Media Server, Apple Time Machine compatible, DHCP client, cloud backup, VPN Server, SFTP client, SNMP support, Apple AirPlay |
| Encryption Algorithm | SSL, TLS |
| Compliant Standards | DLNA CERTIFIED, UPnP |
Expansion / Connectivity | |
| Expansion Bays | 2 (total) / 0 (free) x hot-swap - 2.5" / 3.5" |
| Interfaces | 2 x Ethernet 1000Base-T - RJ-45 , 2 x USB 3.0 - Type A , 2 x USB 2.0 - Type A , 1 x HDMI output |
Miscellaneous | |
| Cables Included | 2 x network cable |
| Features | Security lock slot (cable lock sold separately), audible alarm, fanless |
Power | |
| Power Device | External power adapter |
| Voltage Required | AC 120/230 V |
| Power Provided | 60 Watt |
Software / System Requirements | |
| Storage Operating System | QNAP QTS 4.1 |
| OS Required | UNIX, Linux, Microsoft Windows XP or later, Apple MacOS X or later, Microsoft Windows Server 2003 or later |
Environmental Parameters | |
| Min Operating Temperature | 0 °C |
| Max Operating Temperature | 40 °C |
| Humidity Range Operating | 5 - 95% (non-condensing) |
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