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Synology
DS1821+-RQ-K
Many in stock
Diskstations

3 Years Warranty

Excluding VAT

Designed for scalability and performance

The 8-bay Synology DS1821+ is aimed at IT enthusiast and SMB customers looking for a powerful and scalable storage solution, its business-grade backup solutions keep users safe and protected from potential data loss, while major improvements to compute capabilities and throughput means workloads are finished faster than ever before.

The performance you need

Reduce transfer times with the DS1821+, designed to accelerate your workloads. Easily add faster networking and NVMe drives to further boost performance.

Storage that fits your needs

Make the most of high-performance networking and file access without taking up unnecessary space. DS1821+ comes equipped with 8 bays and can scale up to 18 bays with 2 DX517 expansion units as your data needs grow.

Fully certified storage virtualization solutions

Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.

Ultimate Backup Solution

DS1821+ integrates various backup applications into an intuitive user interface, offering durable storage technologies to safeguard your valuable data on any device.

CPU

CPU Model

AMD Ryzen V1500B

CPU Quantity

1

CPU Architecture

64-bit

CPU Frequency

4-core 2.2 GHz

Hardware Encryption Engine (AES-NI)

Yes

Memory

System Memory

4 GB DDR4 ECC SODIMM

Memory Module Pre-installed

4 GB (4 GB x 1)

Total Memory Slots

2

Maximum Memory Capacity

32 GB (16 GB x 2)

Notes

·       Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.

·       Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.

·       For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.

Storage

Drive Bays

8

Maximum Drive Bays with Expansion Unit

18 (DX517 x 2)

M.2 Drive Slots

2 (NVMe)

Compatible Drive Type* (See all supported drives)

·       3.5" SATA HDD

·       2.5" SATA HDD

·       2.5" SATA SSD

·       M.2 2280 NVMe SSD

Hot Swappable Drive*

Yes

Notes

·       The hot swappable drive feature is not supported by M.2 SSD slots.

·       "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.

External Ports

RJ-45 1GbE LAN Port

4 (with Link Aggregation / Failover support)

USB 3.2 Gen 1 Port*

4

eSATA Port

2

Notes

The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) 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 kg

Others

System Fan

120 mm x 120 mm x 2 pcs

Fan Speed Mode

·       Full-Speed Mode

·       Cool Mode

·       Quiet Mode

Easy Replacement System Fan

Yes

Brightness Adjustable Front LED Indicators

Yes

Power Recovery

Yes

Noise Level*

22.2 dB(A)

Scheduled Power On / Off

Yes

Wake on LAN / WAN

Yes

Power Supply Unit / Adapter

250 W

AC Input Power Voltage

100V to 240V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption

59.8 W (Access)
26.18 W (HDD Hibernation)

British Thermal Unit

204.05 BTU/hr (Access)
89.33 BTU/hr (HDD Hibernation)

Notes

·       Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).

·       Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%

Temperature

Operating Temperature

0°C to 40°C (32°F to 104°F)

Storage Temperature

-20°C to 60°C (-5°F to 140°F)

Relative Humidity

5% to 95% RH

Certification

·       FCC

·       CE

·       BSMI

·       EAC

·       CCC

·       KC

·       VCCI

·       RCM

Warranty

3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus

Notes

The warranty period starts from the purchase date as stated on your purchase receipt.

Environment

RoHS Compliant

Packaging Content

·       Main Unit X 1

·       Accessory Pack X 1

·       AC Power Cord X 1

·       RJ-45 LAN Cable X 2

·       Quick Installation Guide X 1

Optional Accessories

·       DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G

·       Expansion Units: DX517

·       Enterprise Series 3.5" SATA HDD: HAT5300 Series

·       Plus Series 3.5" SATA HDD: HAT3300 Series

·       Enterprise Series 2.5" SATA SSD: SAT5200 Series

·       Enterprise Series M.2 2280 NVMe SSD: SNV3400 Series

·       25GbE Network Interface Card: E25G30-F2

·       10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1

Notes

All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

DSM Specifications
Storage Management
Maximum Single Volume Size 108 TB
Maximum Internal Volume Number 64
M.2 SSD Storage Pool Support* Yes
SSD Read / Write Cache (White Paper) Yes
SSD TRIM Yes
Supported RAID Type
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more)
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
File System
Internal Drives
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
File Services
File Protocol
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Concurrent SMB/AFP/FTP Connections 1,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) 2,000
Windows Access Control List (ACL) Integration Yes
NFS Kerberos Authentication Yes
Notes
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Maximum Local User Accounts 2,048
Maximum Local Groups 256
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 16
Hybrid Share
Maximum Hybrid Share Folders 10
Hyper Backup
Folder and Package Backup Yes
Entire System Backup Yes
Notes Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability Yes
Log Center
Syslog Events per Second 1,000
Virtualization
VMware ESXi 6.5 and VAAI Yes
Windows Server 2016 Yes
Windows Server 2019 Yes
Windows Server 2022 Yes
Citrix Ready Yes
OpenStack Yes
General Specifications
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
Yes
Central Management System
Yes
Synology Chat
Suggested Maximum Users 1,500
Suggested Concurrent Users 150
Notes When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
Download Station
Maximum Concurrent Download Tasks 80
SAN Manager
Maximum iSCSI Target Number 128
Maximum LUN 256
LUN Clone/Snapshot, Windows ODX Yes
Notes iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Additional accounts require purchase of licenses)
Suggested Maximum Users 750
Suggested Concurrent Users 150
Maximum Server Performance 1,484,000 emails per day, approx. 45GB
Notes
  • Models with more than 4 bays were installed with two SSDs for SSD cache.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
  • Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Media Server
DLNA Compliance Yes
Synology Photos
Facial Recognition Yes
Object Recognition Yes
Snapshot Replication
Maximum Snapshots per Shared Folder 1,024
Maximum of System Snapshots 65,536
Surveillance Station
Default Licenses 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
  • 720p: 40 channels, 1200 FPS
  • 1080p: 40 channels, 1050 FPS
  • 3M: 40 channels, 600 FPS
  • 5M: 40 channels, 440 FPS
  • 4K: 32 channels, 320 FPS
Maximum IP Cameras and Total FPS (H.265)
  • 720p: 40 channels, 1200 FPS
  • 1080p: 40 channels, 1200 FPS
  • 3M: 40 channels, 1120 FPS
  • 5M: 40 channels, 600 FPS
  • 4K: 40 channels, 480 FPS
Notes
  • Performance figures are obtained from testing conducted with the device fully populated with drives under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
Synology Drive
Recommended Number of Concurrent Sync Clients 550 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files 50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Utilizing SSD cache can significantly improve performance.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Suggested Maximum Users 4,500
Suggested Concurrent Users 1,800
Notes
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Video Station
Virtual Machine Manager
Recommended Virtual Machine Instances 8
Recommended Virtual DSM Number (Licenses required) 8 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 40

 

Shipping Policy

We can ship to all over Lebanon, Through our delivery drivers for Beirut district, and by Libanpost for outside Beirut district orders.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the product options you chose. Depending on the shipping provider, shipping date would be provided when contacting us through our phone numbers provided in the Contact us section.

Please also note that the shipping rates for many items we sell are location based.

Refund Policy

We have a 3-day return policy, which means you have 3 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging unsealed You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at admin@961souq.com. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

You can always contact us for any return question at admin@961souq.com.

Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items

Certain types of items cannot be returned, like perishable goods (such as headest ,earphone,network card wifi routers ), custom products (such as special orders or personalized items), and pre ordered goods ). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Exchanges

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Synology 8 bay NAS DiskStation DS1821+
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