Synology DS1821+ DiskStation 8-Bay Tower NAS
8-bay DiskStation (up to 18-bay), Quad Core 2.2 GHz, 4GB RAM (up to 32GB), Built-in two M.2 NVMe SSD slots, 10GbE NIC support (optional). High capacity...
Frequently Bought Together
8-bay DiskStation (up to 18-bay), Quad Core 2.2 GHz, 4GB RAM (up to 32GB), Built-in two M.2 NVMe SSD slots, 10GbE NIC support (optional). High capacity storage and data protection for anyone.
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.
CPU
AMD Ryzen™
Quad-core 2.2 GHz
Cache Acceleration
Dual M.2 2280 slots for NVMe Cache
Performance
113K 4K random read IOPS
Scalability
Expand up to 18 drives with two DX517 expansion units
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.
Specs
|
Hardware Specifications |
|
| 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) | ✔ |
| 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) |
| 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* | ✔ |
| External Ports | |
| RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) |
| RJ-45 1GbE LAN Port* | |
| RJ-45 10GbE LAN Port | |
| Out-of-Band Management LAN Port | |
| USB 3.2 Gen 1 Port* | 4 |
| eSATA Port | 2 |
| Expansion Port | |
| PCIe | |
| PCIe Expansion | 1 x Gen3 x8 slot (x4 link) |
| File System | |
| Internal Drives | Btrfs |
| EXT4 | |
| External Drives | Btrfs |
| EXT4 | |
| EXT3 | |
| FAT | |
| NTFS | |
| HFS+ | |
| exFAT | |
| 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 | ✔ |
| Brightness Adjustable Front LED Indicators | ✔ |
| Power Recovery | ✔ |
| Noise Level* | 22.2 dB(A) |
| Scheduled Power On / Off | ✔ |
| Wake on LAN / WAN | ✔ |
| 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) | |
| 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 | Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions. |
| 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 | |
| 3.5" SATA HDD: HAT5300/HAT3300 | |
| 2.5" SATA SSD: SAT5210 | |
| M.2 2280 NVMe SSD: SNV3410 | |
| 25GbE Network Interface Card: E25G21-F2 | |
| 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1 | |
| Surveillance Device License Pack | |
|
DSM Specifications |
|
| Storage Management | |
| Maximum Single Volume Size* | 108 TB |
| Maximum Internal Volume Number | 64 |
| M.2 SSD Storage Pool Support* | ✔ |
| SSD Read / Write Cache (White Paper) | ✔ |
| SSD TRIM | ✔ |
| RAID Group | |
| 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 | |
| File Services | |
| File Protocol | SMB/AFP/NFS/FTP/WebDAV |
| 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 | ✔ |
| NFS Kerberos Authentication | ✔ |
| 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 | ✔ |
| Entire System Backup | ✔ |
| High Availability | |
| Synology High Availability | ✔ |
| Log Center | ✔ |
| Syslog Events per Second | 1,000 |
| Virtualization | |
| VMware vSphere with VAAI | ✔ |
| Windows Server 2016 | ✔ |
| Windows Server 2019 | ✔ |
| Windows Server 2022 | ✔ |
| Citrix Ready | ✔ |
| OpenStack | ✔ |
| General Specifications | |
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers | Google Chrome |
| Firefox | |
| Microsoft 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 |
|
Add-on Packages view the complete package list |
|
| Antivirus by McAfee (Trial) | ✔ |
| Central Management System | ✔ |
| Synology Chat | ✔ |
| Maximum Users | 1,500 |
| Maximum Number of Concurrent Users | 150 |
| Document Viewer | ✔ |
| Download Station | ✔ |
| Maximum Concurrent Download Tasks | 80 |
| SAN Manager | ✔ |
| Maximum iSCSI Target Number | 128 |
| Maximum LUN | 256 |
| LUN Clone/Snapshot, Windows ODX | ✔ |
| Synology MailPlus / MailPlus Server | |
| Free Email Accounts | 5 (Licenses required for additional accounts) |
| Maximum Number of Concurrent Users | 150 |
| Maximum Server Performance | 1,484,000 emails per day, approx. 45GB |
| Media Server | ✔ |
| DLNA Compliance | ✔ |
| Synology Photos | ✔ |
| Facial Recognition | ✔ |
| Snapshot Replication | ✔ |
| Maximum Snapshots per Shared Folder | 1,024 |
| Maximum of System Snapshots | 65,536 |
| Surveillance Station | ✔ |
| Maximum IP cam (Licenses required) | 40 (including 2 Free License) (see all supported IP cameras) |
| Total FPS (H.264) | 1200 FPS @ 720p (1280x720) |
| 1050 FPS @ 1080p (1920x1080) | |
| 600 FPS @ 3M (2048x1536) | |
| 440 FPS @ 5M (2591x1944) | |
| 320 FPS @ 4K (3840x2160) | |
| Total FPS (H.265) | 1200 FPS @ 720p (1280x720) |
| 1200 FPS @ 1080p (1920x1080) | |
| 1120 FPS @ 3M (2048x1536) | |
| 600 FPS @ 5M (2591x1944) | |
| 480 FPS @ 4K (3840x2160) | |
| 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) |
| Synology Office | ✔ |
| Maximum Users | 1,800 |
| 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 |