Network storage (8 disk slots)-Shenzhen Ruianjie Electronic Technology Co., Ltd.

DiskStation ® DS1821+

Synology DiskStation DS1821
It is a powerful 8-slot network connected storage solution designed to store and protect mission critical data.
DS1821 is designed to handle an increasing amount of unstructured data, and its low-noise desktop form factor is specifically built for SOHO and SMB environments.
The 4K random read IOPS performance of DS1821 reaches over 110K, which is 177% higher than the previous generation product, very fast, and has sufficient scalability space.

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Product details

Highlights

Compared with previous generation products, the acceleration performance has increased by 177% in 4K random read IOPS and 76% in continuous write speed. Maximize performance by using dual built-in M.2 slots suitable for NVMe SSD cache, significantly improving HDD array performance without occupying hard disk slots
Easy expansion can be achieved by expanding two DX517 expansion devices to 18 hard drives as needed
Includes all features for protecting data using Synology Active Backup Suite, Hyper Backup, and Snapshot Replication to backup critical data from public clouds, computers, servers, virtual machines, and Synology NAS
Supports 10/25GbE, 10GbE SFP/RJ-45 and 25GbE SFP28 network cards, which can quickly increase network bandwidth according to the infrastructure

processor
Processor model	AMD Ryzen V1500B
Number of CPUs	1
CPU core	4
Processor architecture	64 bit
Processor frequency	2.2 GHz
Hardware Encryption Engine
Memory
system memory	4 GB DDR4 ECC SODI MM
Pre installed memory module	4 GB I4 GB x 1 J
Total number of memory slots	2
Maximum memory capacity	32 GB （16 GB x 2）
remarks	·Synology reserves the right to replace the same or higher frequency memory modules based on the supplier's product supply situation. Its compatibility and stability have undergone the same rigorous testing and inspection, so users can use it with confidence. ·Please choose Synology memory modules for better compatibility and reliability. If non Synology memory modules are used during memory expansion, Synology will not provide comprehensive product guarantees or technical support. ·For further information on recommended memory configurations, please refer to the hardware installation guide for your Synology product.
storage
Number of disk slots	8
Maximum number of disk slots for installing expansion devices	18 （ DX517 x 2）
M. 2 hard drive slots	2 （NVMe）
*Compatible with disk types(⻅ All supported disks)**	3.5-inch SATA HDDThe2.5-inch SATA HDDThe2.5-inch SATA SSDTheM.2 2280 NVM SSD
Disk hot swappable support*	support
remarks	M. 2 SSD slots do not support hard disk hot swapping function. The 'compatible hard drive type' indicates that the hard drive has been tested and is compatible with Synology products. This term does not refer to the maximum connection speed for each hard drive slot.

External port
RJ 45 1GbE Ethernet port	4
USB 3.2 Gen 1 port*	4
Expand ports	2
Expansion port type	eSATA
remarks	The USB Implementers Forum IUSBc IFJ renamed the standard originally named USB 3.0 to USB 3.2 Gen 1 in 2019.
PCIe
PCIe expansion	1 x Gen3 x8 slot (x4 link)
appearance
size (Height X Width X Depth)	166 mm x 343 mm x 243 mm
weight	6 kilograms
System fan	120 mm x 120 mm x 2 pcs
Fan mode	Fastest modeTheLow temperature modeThequiet mode
Replaceable system fan	√
Adjustable front panel LED indicator brightness	√
Automatic power restoration	√
Noise level*	22.2 dBIAJ
Timed opening/Shut down	√
Internet wake-up	√
Power supply unit /Transformer	250 watts
AC input voltage	100V to 240V AC
Current frequency	50/60 Hz, single frequency
Power consumption	59.8 watts (access)，26.18 watts (hard drive sleep)
remarks	Power consumption is at full load Measured with a Western Digital 1TB WD10EFRX hard drive. Noise level testing environment: Full load ，The Seagate 2TB ST2000VN000 hard drive is idle. Two G.R.A.S.Type 40AE microphones are installed at a distance of 1 meter each from the Synology NAS. Background noise: 16.49c17.51 dBIAJ； Temperature: 24.25c25.75. C； Humidity: 58.2c 61.8%
Warm and humiddegree
working temperature	0 ° C to 40 ° C I32 ° F to 104 ° FJ
Storage temperature	20 ° C to 60 ° C Ic5 ° F to 140 ° FJ
relative humidity	5% to 95% RH
remarks	Power consumption is at full load Measured with a Western Digital 1TB WD10EFRX hard drive. ·Noise level testing environment: Seagate 2TB ST2000VN000 hard drive is idle when fully loaded. Two G.R.A.S.Type 40AE microphones are installed at a distance of 1 meter each from the Synology NAS. Background noise: 16.49c17.51 dBIAJ; Temperature: 24.25c25.75. C； Humidity: 58.2c 61.8%

guarantee
3-year hardware warranty
remarks	The warranty period starts from the purchase date indicated on the purchase receipt.(View more content) If no valid product purchase receipt or product invoice is presented, or if there are obvious If there is an error or forgery, the warranty period of the provided product should be based on Synology's internal records are calculated from the date of manufacture.
environment
accord with RoHS standard
Packaging Content	host X 1 Accessories package X 1Thepower cord X 1 RJ 45 cable X 2TheQuick Installation Guide X 1
Choose accessories
DDR4 ECC SODI MM: D4ES01c4G/D4ES01c8G/D4ECSOc2666c16G Expand equipment ：DX517 Enterprise Series 3.5-inch SATA HDD: HIT5300 Series Plus Series 3.5-inch SATA HDD: HAT3300 Series Enterprise Series 2.5-inch SATA SSD: SAT5200 Series Enterprise Series M.2 2280 NVMe SSD: SNV3400 Series 25GbE card: E25G30cF2 10GbE card: E10G21cF2/E10G30cT2/E10G18cT1
remarks	All memory modules will press Run at the frequency limit specified by the CPU manufacturer.

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