QNAP 2‑Bay TS‑251A 2GB

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Identifiers
Model QNAP TS-251A-2G
MPN QNAP TS-251A-2G
Dimensions / Weight
Key Features
AC input voltage
The alternating current voltage range that the product accepts from its power source, expressed in volts (V). It indicates the minimum and maximum supply voltages compatible with the device.
100-240 V
Backup features Cloud,iSCSI LUN
Backup function
Indicates whether a device has the capability to create backups of its data or settings, allowing restoration in case of loss, failure, or interruption.
Yes
Browser supported
A list of web browsers that the product can run or support, typically including major desktop and mobile browsers such as Chrome, Firefox, Safari, Edge, Internet Explorer, Opera, and others. Each value represents a distinct browser name or version range that has been verified to work with the device.
Microsoft Internet Explorer 10+, Mozilla Firefox 8+, Apple Safari 4+, Google Chrome
Built-in FTP server
Indicates whether the product includes a built‑in FTP server that allows file transfer and management over the network without requiring an external device.
Yes
Built-in iTunes server Yes
Built-in UPnP AV media server
Indicates whether the product includes a built‑in Universal Plug and Play (UPnP) Audio/Video media server that can stream audio or video content to other devices on the network. A value of "Yes" means the device has this capability; "No" means it does not.
Yes
Cable lock slot
Indicates whether the product includes a slot for inserting a cable lock, such as a Kensington or similar security device.
Yes
Cable lock slot type
The specific type of cable lock interface that a device provides for securing cables, such as Kensington, Noble, IBM or other standard locking mechanisms.
Kensington
Cables included
A list of the cable types that are supplied with the product, such as USB, HDMI, VGA, DisplayPort, LAN (RJ‑45), SATA, audio or other relevant connectors.
AC,LAN (RJ-45)
Card reader integrated
Indicates whether the device includes a built‑in card reader that can read removable memory cards such as SD, microSD, MMC or similar formats.
Yes
Chassis type
The physical configuration or shape of a computer chassis, such as tower, rack‑mount (e.g., 1U, 2U), desktop, mini‑PC, or other compact designs. It indicates the overall size and mounting style that determines compatibility with motherboards, power supplies, and case accessories.
Tower
Compatible memory cards
List of the memory card types that a device can read or write, such as MicroSD (TransFlash), SD, MMC, CompactFlash, and others. Each value represents a format that the device’s slot or reader supports for storage expansion.
SD
Cooling type
The method used to dissipate heat from a component or system, such as active cooling (fans or liquid loops), passive heat sinks, or no active cooling. It indicates whether the product relies on airflow, conduction, or other mechanisms to maintain safe operating temperatures.
Active
Depth
The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.
219 mm
Device class
A free‑text label that identifies the general category or type of a device, such as "NAS", "Server", "Router", "Storage Enclosure" or any other descriptive class used by manufacturers to classify their products. The value is intended to help users quickly understand the primary function or form factor of the item.
Home & Home Office
DHCP Client
Indicates whether the device supports the DHCP client function, meaning it can automatically request an IP address and related network settings from a DHCP server.
Yes
DHCP server
Indicates whether the device supports acting as a DHCP server, allowing it to assign IP addresses and network configuration settings to clients on the network.
Yes
ECC supported by processor
Indicates whether the processor in a device supports Error Correcting Code (ECC) memory, allowing detection and correction of single-bit errors during data storage or transfer.
No
Embedded options available
Indicates whether the product includes embedded options such as firmware features, hardware modules or configuration settings that are built into the device and available for use without external accessories.
Yes
Enhanced intel speedstep technology Yes
Ethernet LAN
Indicates whether the product includes an Ethernet LAN interface for wired network connectivity, allowing data transmission over RJ‑45 or compatible cables.
Yes
Ethernet LAN data rates
Maximum theoretical speed at which a device can send or receive data over its Ethernet LAN interface, expressed in megabits per second (Mbps) or gigabits per second (Gbps). It represents the upper bound of throughput under optimal conditions and is useful for comparing network performance between devices with wired connectivity.
10,100,1000 Mbit/s
Execute disable bit
Indicates whether the processor’s Execute Disable bit is enabled, allowing the CPU to prevent execution of code from memory regions marked as non-executable.
Yes
External power adapter
Indicates whether the product comes with an external power adapter in its packaging. A value of "Yes" means a charger is supplied; a value of "No" means no charger is included and the user must obtain one separately.
Yes
Fan diameter
The linear measurement across the widest part of a fan, expressed in units such as millimeters (mm), centimeters (cm) or inches (in). It represents the overall width of the fan and is useful for determining fit, compatibility with cases, and airflow characteristics.
7 cm
Fan voltage
The electrical potential difference supplied to a fan, expressed in volts (V). It indicates the nominal operating voltage required for the fan to run correctly and helps users match power supplies or adapters with compatible fans.
12 V
Flash memory
The total amount of internal flash memory available in a device, expressed as a data size (e.g., megabytes or gigabytes). This attribute indicates how much data can be stored on the device’s built‑in flash storage.
4096 MB
HDMI ports quantity 1
Height
The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.
169 mm
Hot spare
Indicates whether the device includes an active backup unit (hot spare) that can automatically replace a failed drive without service interruption.
Yes
Hot-swap drive bays
Indicates whether the product’s drive bays support hot‑swap, meaning drives can be inserted or removed while the device is powered on without shutting down or rebooting.
Yes
Idle states
A list of the various low‑power or standby modes that a device can enter to conserve energy when not actively performing tasks.
Yes
Installed storage drive type No
Integrated 4G WiMAX
Indicates whether a device includes built‑in 4G WiMAX connectivity, allowing it to access mobile broadband networks without an external modem.
No
Intel 64
Indicates whether the processor is compatible with the Intel® 64 architecture, enabling it to run operating systems and applications designed for x86‑64 processors.
Yes
Intel clear video technology
Indicates whether the product incorporates Intel’s Clear Video HD technology, a hardware feature that enhances video playback and capture quality by providing smoother motion, reduced artifacts, and improved color accuracy.
Yes
Intel enhanced halt state
Indicates whether the processor includes Intel’s Enhanced Halt State feature, which allows the CPU to enter a low‑power idle mode when not actively executing instructions, thereby reducing energy consumption without compromising performance.
Yes
Intel rapid storage technology
Indicates whether the product supports Intel Rapid Storage Technology, a software and firmware solution that enables RAID configurations, improves storage performance, and provides data protection features for compatible drives.
No
Intel secure boot
Indicates whether the product supports Intel Secure Boot, a firmware security feature that ensures only trusted software is loaded during system startup.
Yes
Intel smart connect technology
Indicates whether the product incorporates Intel Smart Connect Technology, a feature that enables automatic network connectivity and device management for seamless integration into enterprise or home environments.
No
Intel trusted execution technology
Indicates whether the product incorporates Intel’s Trusted Execution Technology, a security feature that creates isolated execution environments to protect sensitive code and data from tampering or unauthorized access.
No
Internal memory
The total amount of internal memory available in a device, expressed as a data size such as megabytes (MB) or gigabytes (GB). It indicates how much information the component can hold for active processes and affects multitasking performance.
2 GB
Internal memory type
The type of memory physically installed inside a device, such as DDR4 SDRAM, LPDDR3, or other RAM variants. It indicates the architecture and generation of the internal memory modules that the product uses or supports.
DDR3L
iSCSI support Yes
Jumbo frames support Yes
LED indicators
A list of the functions or statuses that an LED indicator on a device can display, such as power status, activity, link, and other operational signals.
Power,Ready,Reset
Link aggregation
Indicates whether the device can combine multiple network connections into a single logical link to increase bandwidth or provide redundancy.
Yes
Linux operating systems supported
List of Linux operating systems that the product can run or support, including specific versions and architectures when relevant. Each value represents a distinct Linux distribution or kernel version supported by the hardware or software.
Yes
Maximum internal memory supported by processor
The largest amount of internal random‑access memory (RAM) that a processor can address and support, expressed as a data size such as megabytes or gigabytes. It indicates the upper limit of memory capacity for active processes and multitasking performance on devices using this CPU.
8 GB
Maximum number of PCI Express lanes
The total count of PCI Express lanes available on a device or component, indicating the maximum number of high‑speed communication channels that can be used simultaneously for peripherals such as graphics cards, storage devices, and networking adapters.
4
Memory channels supported by processor
The total number of independent memory channels that a processor or motherboard supports for installing RAM modules. Each channel can handle one or more memory sticks, allowing the system to access data in parallel and improving performance.
Dual
Multilingual support
Indicates whether a product supports multiple languages for its user interface, documentation or help resources. A value of "Yes" means the device offers language options beyond the default; "No" indicates it is limited to a single language.
Yes
Noise level
The sound intensity produced by a product, expressed in decibels (dB) or sones. It indicates how loud the device is during operation and helps users assess suitability for quiet environments.
18.3 dB
Number of screws
The total count of individual screws included with a product or component. It indicates how many separate screw units are provided for assembly, mounting, or securing parts, regardless of size or type.
14
On-board graphics adapter base frequency
The clock speed at which the integrated graphics processor runs under normal conditions, expressed in hertz (Hz). It indicates how many cycles per second the GPU performs and is useful for comparing visual performance across devices that use an on‑board graphics solution.
320 MHz
On-board graphics adapter burst frequency 600 MHz
On-board graphics adapter DirectX version
The version number of the DirectX graphics API supported by a device, indicating its graphical capabilities and compatibility with software that relies on specific DirectX features.
12.0
On-board graphics adapter model
The model name or number of the integrated graphics adapter built into a device, such as a laptop or motherboard. It identifies the specific GPU variant used for rendering and video processing, allowing users to compare visual performance and compatibility across products.
Intel® HD Graphics 400
On/off switch
Indicates whether the product includes an on/off switch that allows the user to power it on or off manually.
Yes
Operating system installed
The operating system that is installed on the device, indicating the software platform that manages hardware resources and provides services for applications. It can be a commercial OS such as Windows or macOS, an open‑source distribution like Linux, or a proprietary firmware used in embedded devices.
QNAP Turbo System
Operating system version
The specific version of the operating system that a product supports or runs, expressed as a numeric revision (e.g., 10, 11) or a descriptive name (e.g., Nougat). This attribute helps users determine compatibility with software and updates.
4.2
PCI Express configurations
A textual description of how PCI Express lanes are distributed across the available slots or interfaces in a device. The value typically lists groups of lanes separated by commas, where each group may contain a number of lanes and optional ‘+’ signs to indicate combined lanes that share the same speed (e.g., "1x16", "2x8", "1x8+2x4"). This attribute helps users understand the bandwidth capacity and compatibility of expansion slots.
1x2+2x1,1x4,2x2,4x1
PCI Express slots version
The version of the PCI Express specification supported by a device or component. It indicates the maximum bandwidth and compatibility with PCIe devices such as graphics cards, storage controllers, and expansion cards. The value is typically expressed as a numeric revision (e.g., 2.0, 3.0, 4.0) but may also include descriptive labels for specific generations.
2.0
Power consumption (off) 0.72 W
Power management
Indicates whether the device supports power‑management features such as automatic sleep, wake‑on‑LAN, or energy‑saving modes. A value of "Yes" means the product can enter low‑power states or be remotely controlled to conserve energy; "No" indicates it lacks these capabilities.
Yes
Power supply location
The physical position where the power supply unit is installed or mounted within a device, such as top, bottom, rear, side, front, or built‑in. This attribute helps users understand where to find the power source and plan cable routing or ventilation.
External
Processor ARK ID
The Processor ARK ID is a numeric identifier assigned by Intel to each processor model. It uniquely distinguishes one CPU from another and can be used to look up detailed specifications, compatibility information, or firmware updates for that specific chip.
91832
Processor boost frequency
The maximum operating frequency that a processor can reach when its turbo or boost feature is active, expressed in hertz (Hz). This value indicates the peak performance capability of the CPU under load and helps users compare how fast a processor can run beyond its base clock speed.
2.48 GHz
Processor codename Braswell
Processor family
The processor family identifies the group or series of CPU models that share a common architecture, design, and performance characteristics. It helps users compare processors across brands and generations by indicating the underlying technology used in the chip.
Intel® Celeron®
Processor frequency
The fundamental operating frequency of a processor, expressed in hertz (Hz). It indicates the speed at which the CPU runs under normal conditions and is typically reported in gigahertz (GHz) or megahertz (MHz). This value helps users compare performance potential across different models.
1.6 GHz
Processor model
Identifies the exact model of the central processing unit used in a device, including brand and numeric designation such as "Intel Core i5-8250U" or "AMD Ryzen 7 3700X". This value allows users to distinguish between different processor families, generations, and performance levels.
N3060
Processor operating modes
The set of instruction set architectures or execution modes that a processor can operate in, such as 32‑bit or 64‑bit. This attribute indicates the architectural mode(s) supported by the CPU and helps users determine compatibility with software that requires a specific bitness.
64-bit
Processor package size
The overall dimensions of a processor’s physical package, expressed as length × width × height in millimetres or inches. It indicates the size that must fit within a motherboard socket or mounting area and helps users compare compatibility across different CPU models.
25 x 27 mm
Processor series
The processor series identifies the family or generation of a CPU, such as "Intel Xeon E5-2600" or "AMD Ryzen 5000". It is used to group models that share similar architecture, performance characteristics and compatibility features.
Intel Celeron N3000 series
Processor socket
The physical connector used by a processor to attach to a motherboard or other compatible platform. Common examples include LGA 1151, BGA 1440, Socket AM4, and LGA 1200. This attribute indicates the exact socket designation required for proper CPU installation and compatibility.
BGA 1170
Quick installation guide
Indicates whether a quick‑installation guide is provided with the product. A value of "Yes" means that a brief, step‑by‑step manual or overview is included to help users set up the device quickly; "No" indicates that no such guide is supplied.
Yes
RAID levels
A comma‑separated list that specifies the RAID configurations supported by a storage controller or device. Each entry can be a numeric level (e.g., 0, 1, 5, 10) or a special label such as JBOD. This attribute indicates which disk arrangements the system can manage.
0,1,JBOD
RAID support
A comma‑separated list of RAID levels that a storage device or controller can support, such as 0, 1, 5, 10, JBOD, and other proprietary configurations. Each value represents a distinct RAID mode the system is capable of creating or managing.
Yes
Reset button
Indicates whether the device has a physical reset button that restores factory settings or original configuration when pressed.
Yes
S.M.A.R.T. support
Indicates whether the product supports S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology), a feature that monitors storage device health and predicts failures.
Yes
Security algorithms
Una lista de los algoritmos criptográficos y protocolos de seguridad que el producto soporta, como cifrado (AES, WEP), autenticación (WPA2-PSK, EAP-TLS) o protocolos de red (HTTPS, SSH). Cada elemento describe un algoritmo individual; la lista puede contener varios valores separados por comas.
256-bit AES,FIPS 140-2,HTTPS,SSH,SSL/TLS
Share folder
A list of network file‑sharing protocols that the device can use to expose shared folders or drives. Common values include CIFS/SMB, AFP, NFS, FTP, and WebDAV. The attribute helps users understand which remote access methods are available for mounting or accessing storage on the device.
CIFS/SMB
Share folder access right management
Indicates whether the product allows users to manage access rights for shared folders. A value of "Yes" means that the device or service provides a mechanism to assign, modify, or revoke permissions on shared directories, enabling controlled sharing among multiple users.
Yes
Storage drive sizes supported
A list of the physical sizes and types of storage drives that a product can accommodate, such as 2.5‑inch, 3.5‑inch, or M.2. The values are typically separated by commas and may include additional descriptors like "M.2" to indicate an internal solid‑state drive interface.
2.5,3.5"
Storage drives installed
The total count of individual storage devices (hard disk drives or solid‑state drives) that are physically present in the product. It indicates how many separate drives are installed, regardless of capacity or interface type.
No
Supported file systems
A comma‑separated list of file system formats that the product can read or write, such as FAT32, NTFS, ext4, exFAT, HFS+, and others. Each value represents a distinct storage format supported by the device’s firmware or operating system.
FAT32,HFS+,NTFS,ext3,ext4
Supported storage drive interfaces
List of physical or logical interfaces that allow an internal storage drive to communicate with the system, such as SATA, M.2 PCIe, U.2, SAS, NVMe, or other standard connections.
Serial ATA III
Supported storage drive types
A list of the types of storage drives that a product can accommodate or use, such as HDD, SSD, or hybrid configurations. Each entry indicates a distinct drive type that is supported by the device’s bays, slots, or external interfaces.
HDD,SSD
System bus rate
The maximum theoretical speed at which the system bus can transfer data, expressed in gigatransfers per second (GT/s). This value indicates the bandwidth capacity of the internal communication pathway between components such as the CPU and memory or peripheral devices.
5 GT/s
System log
Indicates whether the product includes a system log feature that records events, errors, or status updates for troubleshooting and monitoring purposes. The value is a simple yes/no answer.
Yes
Thermal monitoring technologies Yes
Tjunction
Die maximale Temperatur, bei der ein Produkt sicher betrieben werden kann. Der Wert wird in Grad Celsius angegeben und gibt an, bis zu welcher Hitze das Gerät ohne Gefahr für Funktionsstörungen oder Schäden arbeiten darf.
90 °C
Type
The general category or style of the product, such as laptop, printer cartridge, or cooling fan. It helps buyers quickly identify the nature of the item and compare similar products.
NAS
UART
Indicates whether the product includes a UART (Universal Asynchronous Receiver/Transmitter) serial communication interface. A value of "Yes" means the device has at least one UART port for transmitting and receiving serial data; "No" indicates no such interface is present.
Yes
Wake-on-LAN ready
Indicates whether the device can be powered on remotely via Wake‑on‑LAN, allowing a network administrator or user to start it from sleep or off state using a network packet.
Yes
Web-based management
Indicates whether the product can be configured and monitored through a web interface accessible via a browser, allowing remote administration over a local or internet connection.
Yes
Weight
The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.
1.28 kg
Wi-Fi
Indicates whether the product has built‑in Wi‑Fi capability, allowing it to connect to wireless networks without requiring external adapters or dongles.
No
Width
The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.
102 mm
QNAP

QNAP is a Taiwanese technology company that produces network-attached storage (NAS) devices. The company was founded in 2004 and is headquartered in Taipei. QNAP's products are used by consumers, small businesses, and enterprises, and include NAS devices, surveillance solutions, and cloud storage services.