Synology DS1621xs+/96TB-SIW PRO DiskStation 6-Bay 96TB NAS Bundle
£4,037.52 inc.VAT / £3,364.60 exc.VAT
Synology DS1621xs+/96TB-SIW PRO DiskStation 6-Bay 96TB NAS w/ 6x16TB IronWolf Pro
Synology DS1621xs+/96TB-SIW PRO DiskStation 6-Bay 96TB NAS Bundle is a high-end, high-performance NAS solution.
Out of stock
Synology DS1621xs+/96TB-SIW PRO DiskStation 6-Bay 96TB NAS w/6×16 TB IronWolf Pro Bundle
Synology DS1621xs+/96TB-SIW PRO DiskStation 6-Bay 96TB NAS Bundle is a high-end, high-performance NAS solution.
Synology DS1621xs+/96TB-SIW PRO DiskStation supports every aspect of your business with powerful data management, collaboration, and networking tools topped off with well-rounded data protection mechanisms in a 6-bay desktop chassis.
Built-in M.2 SSD cache slots, 10GbE connectivity, scalable storage, and Synology 5-year limited warranty make the DS1621xs+ a future-proof choice to build on-premises cloud infrastructure.

On-premises cloud solution built for performance
Key Features
- Bundled with 96TB of storage capacity (includes 6 x 16TB Seagate IronWolf Pro HDDs).
- Built for High-Speed Connectivity
Combine built-in 10GbE and optional high-speed NIC for over 3,100 MB/s sequential read performance. - Boost Performance With SSD Cache
Built-in M.2 2280 NVMe SSD slots (un-populated) permit cache acceleration without using storage drive bays. - Flexibly Expand Storage Size
Flexibly scale up to sixteen (16) drives to increase storage capacity as demand grows. - Collaboration and Productivity Suite
Build an on-premises, multi-user collaboration environment with fine-grained controls. - Protect and Restore Data in a Snap
Back up critical data and reduce your Recovery Time Objective (RTO) with Snapshot Replication. - Leverage Native Visualization Tools
Use virtualization storage tools to complete your SAN or run virtual machines on a full-featured hypervisor. - Fully Back Up Business Assets
Back up company data from PCs, public cloud, company servers, and virtual machines.
Includes Seagate IronWolf Pro Hard Drives
Seagate IronWolf Pro SATA Hard Drives are designed for everything business NAS. Get used to tough, ready and scalable 24×7 performance that can handle multi-drive environments.
Seagate IronWolf Pro SATA Hard Drives are purpose built for 1 to 16 bay business network attached storage and includes backup, archiving and disaster recovery applications.
Hard Drive Vital Statistics
- Model Number:Â ST16000NE000
- Capacity: 16 TB
- Speed:Â 7200 RPM
- Cache:Â 256MB
- Interface:Â SATA 6Gb/s
- Form factor:Â 3.5 inch

High-End Scalable Storage, Desktop Form Factor
The Synology DS1621xs+ offers great built-in functionality and easy hardware expand-ability, ideal for small and medium-sized businesses that need an efficient and space-saving storage solution.
- A server-class 4-core processor and 8 GB DDR4 ECC memory (upgradeable up to 32 GB) ensure smooth handling of heavy workloads and multi-tasking operations.
- Two (2) M.2 2280 NVMe SSD slots let you take full advantage of Synology SSD Cache functionality. Add SSD cache for up to 20 times faster I/O response without using front drive bays.
- One (1) built-in 10GbE port provides fast data transmission and can be bonded with an additional 10GbE NIC (sold separately) for sequential read speeds over 3,100 MB/s.
- Storage capacity can be increased to up to sixteen (16) drives with two (2) Synology DX517 expansion units (sold separately).
On-premises Collaboration & Synching Solution
The DS1621xs+ comes with Synology Collaboration Suite, the productivity and file sharing solution that powers team collaboration while leveraging the advantages of the private cloud to fully control data and prevent data leaks through HTTPS support, a built-in firewall, and multiple IP and account intrusion auto-blocking mechanisms.
- Synology Drive enables data synchronization and backup via web portal and desktop applications across Windows, macOS, and Linux platforms. Intelliversioning saves historical versions while minimizing storage space use and supports on-demand data restoration.
- Synology Office includes Documents, Spreadsheets, and Slides. Its online editing environment allows multiple users to edit, comment, and share company data simultaneously — at no additional licence fee.
- Synology MailPlus is a reliable mail server, accessible through an intuitive web-based client, that helps users to manage emails and increase productivity. MailPlus supports deployment in High-Availability clusters.
- Synology Chat enables instant conversations and optimises team communications with powerful features including message encryption, pinning, forwarding, reminders, and scheduling.
Establish a Strong Storage Foundation with Btrfs
The DS1621xs+ features a Btrfs file system optimized by Synology to offer you high reliability and high performance. Btrfs supports advanced storage technologies that meet the needs of modern business:
- Advanced snapshot technology provides schedulable and near-instantaneous data protection of shared folders and LUNs.
- File and folder level data restoration offers users who wish to restore only a specific file or folder more flexibility.
- Flexible Shared Folders and User Quota System provide comprehensive quota control on all user accounts and shared folders.
- File self-healing allows Btrfs file systems to auto-detect corrupted files using mirrored metadata and to recover broken data using RAID configurations.
- Inline compression compresses data before writing them to the drive, to optimize storage use and reduce write commands to the drives.
Running & Protecting Virtual Machines
Synology Virtual Machine Manager (VMM) is an intuitive hypervisor application that lets users easily set up virtual machines and run operating systems including Windows, Linux, and Virtual DSM.
With VMM, users can build up a cluster environment with multiple Synology systems while keeping the flexibility to scale out online and migrate virtual machines for load balancing and resource allocation.
Disaster recovery features including instant snapshot, replication, cloning, restore and failover help you fully protect each virtual machine and safeguard your digital assets at no additional cost.
VMM Pro licences give access to advanced features including remote replication, remote storage migration, high availability and live migration, helping users further minimize the risk of service downtime and manage IT resources with maximum flexibility.
- Snapshots for virtual machines
Perfectly clone and restore a virtual machine within seconds. - Live migration
Seamlessly migrate Virtual DSM instances from a Synology NAS to another. - Multi-tenant environment
Create multiple isolated virtual machines for subsidiary business units or departments.
Full Backup Suite
The DS1621xs+ offers users a complete range of backup solutions by integrating backup for cloud, physical and virtual on-premises environments in one software suite.
Backing up and restoring data is effortless — and completely free of licences on compatible NAS models.
- Back up your cloud data
Cloud Sync enables users to seamlessly back up or synchronize data between a local Synology NAS and other cloud services.
Active Backup for Office 365/G Suite offers users an on-premises backup solution for public cloud data,             optimizing storage efficiency by using Synology’s single instancing and block-level deduplication technology.
- Back up your PCs and servers
Active Backup for Business is an integrated solution to back up your Windows PC, servers and rsync/SMB file servers, offering various recovery options to ensure the lowest RTO.
Synology Drive Client backs up your Windows, macOS, and Linux desktop devices to safeguard important           computer files.
- Back up your virtual machines
Active Backup for Business is the solution to back up your virtual machines, offering a range of recovery options to ensure the lowest RTO. - Back up your Synology NAS
Hyper Backup offers a wide range of destinations for backups of your NAS, including on-premises and cloud.
Maximum Reliability Design
System reliability is critical for any business. The DS1621xs+ meets the need for maximum up time with a wide range availability and redundancy features:
- Synology High Availability ensures seamless transitioning between clustered servers in the event of an unexpected disaster and ensures that your services remain online.
- High reliability system design, including fan-less CPU heat-sinks and passive cooling technology, eliminates single points of failure.
- Hot-swappable drive trays are easily replaced if a drive malfunctions.
- DDR4 ECC SODIMM reduces power consumption and features error detection and correction capabilities during data transmission.
5-year warranty
Synology are committed to product innovation and quality. They guarantee a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your return on investment.
Powered by Synology DSM
- Central Management System
Manage multiple Synology NAS servers simultaneously on a centralised interface to increase business efficiency. - Synology MailPlus
Secure, reliable, and private mail server solution with an intuitive and modern mail client. - Synology High Availability
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications. - Security
Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats. - Synology Drive
A versatile solution for file management and synchronization. - Surveillance Station
Complete surveillance solution for recording, monitoring, and management.
Specifications
Hardware Specifications
CPU
CPU Model
- Intel Xeon D-1527
CPU Architecture
- 64-bit
CPU Frequency
- 4-core 2.2 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
- Yes (AES-NI)
Memory
System Memory
- 8 GB DDR4 ECC SODIMM
Memory Module Pre-installed
- 8 GB (8 GB x 1)
Total Memory Slots
- 2
Maximum Memory Capacity
- 32 GB (16 GB x 2)
Notes
- 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.
- 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.
Storage
Drive Bays
- 6
- Bundled with 96TB of storage capacity (includes 6 x 16TB Seagate IronWolf Pro HDDs).
Maximum Drive Bays with Expansion Unit
- 16 (DX517 x 2 – sold separately)
M.2 Drive Slots
- 2 (NVMe)
Compatible Drive Type
- 3.5″ SATA HDD
- 2.5″ SATA HDD
- 2.5″ SATA SSD
- M.2 2280 NVMe SSD
Maximum Single Volume Size
- 200 TB (32 GB RAM required, for RAID 5 or RAID 6 groups only)
- 108 TB
Hot Swappable Drive
- Yes
Notes
- “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.
- Each internal volume (may consist of multiple drives) is expandable up to 108TB (with memory less than 32GB) or 200TB (with memory equal to or greater than 32GB).
External Ports
RJ45 1GbE LAN Port
- 2 (with Link Aggregation / Failover support)
RJ45 10GbE LAN Port
- 1
USB 3.0 Port
- 3
eSATA Port
- 2
PCIe
PCIe Expansion
- 1 x Gen3 x8 slot (x8 link)
File System
Internal Drives
- Btrfs
- EXT4
External Drives
- Btrfs
- EXT4
- EXT3
- FAT
- NTFS
- HFS+
- exFAT
Notes
- exFAT Access is purchased separately in Package Center.
Appearance
Dimensions (H x W x D)
- 166 x 282 x 243 mm
Weight
- 5.3 kg
Others
System Fan
- 92 mm x 92 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
- 25.2 dB(A)
Scheduled Power On / Off
- Yes
Wake on LAN / WAN
- Yes
Power Supply Unit / Adapter
- 250 W
AC Input Power Voltage
- 100 V to 240 V AC
Power Frequency
- 50/60 Hz, Single Phase
Power Consumption
- 62.85 W (Access)
- 34.26 W (HDD Hibernation)
British Thermal Unit
- 214.45 BTU/hr (Access)
- 116.89 BTU/hr (HDD Hibernation)
Notes
- Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s) (sold separately).
- Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) (sold separately) 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: 24.25ºC-25.75ºC; Humidity: 58.2-61.8%
Temperature
Operating Temperature
- 0ºC to 40ºC (32ºF to 104ºF)
Storage Temperature
- -20ºC to 60ºC (-5ºF to 140ºF)
Relative Humidity
- 5% to 95% RH
Certification
- EAC
- VCCI
- CCC
- RCM
- KC
- FCC
- CE
- BSMI
Environment
- RoHS Compliant
Software Specifications
DSM Specifications
Storage Management
Maximum Internal Volume Number
- 256
Maximum iSCSI Target Number
- 256
Maximum iSCSI LUN
- 512
iSCSI LUN Clone/Snapshot, Windows ODX
- Yes
SSD Read / Write Cache (White Paper)
- Yes
SSD TRIM
- Yes
RAID Group
- Yes
Supported RAID Type
- RAID F1
- 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
- RAID F1
- RAID 1
- RAID 5
- RAID 6
- RAID 10
Volume Expansion by Adding a HDD
- RAID F1
- JBOD
- RAID 5
- RAID 6
Global Hot Spare Supported RAID Type
- RAID F1
- RAID 1
- RAID 5
- RAID 6
- RAID 10
File Services
File Protocol
- CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections
- 2,000
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)
- 8,000
Windows Access Control List (ACL) Integration
- Yes
NFS Kerberos Authentication
- Yes
Account & Shared Folder
Maximum Local User Accounts
- 16,000
Maximum Local Groups
- 512
Maximum Shared Folder
- 512
Maximum Shared Folder Sync Tasks
- 32
High Availability
Synology High Availability
- Yes
Log Center
Syslog Events per Second
- 1,500
Virtualization
VMware vSphere 6 with VAAI
- Yes
Windows Server 2016
- Yes
Citrix Ready
- Yes
OpenStack
- Yes
General Specifications
Networking Protocols
- SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
- Chrome
- Firefox
- Edge
- Internet Explorer 10 onwards
- Safari 10 onwards
- Safari (iOS 10 onwards)
- Chrome (Android 6.0 onwards)
Supported Language
- English
- German
- French
- Italian
- Spanish
- Danish
- Norwegian
- Swedish
- Dutch
- Russian
- Polish
- Hungarian
- Portuguese (Brazil)
- Portuguese (Europe)
- Turkish
- Czech
- Thai
- Japanese
- Korean
- Chinese (Traditional)
- Chinese (Simplified)
Add-on Packages
Antivirus by McAfee (Trial)
- Yes
Central Management System
- Yes
Synology Chat
Maximum Users
- 4,000
Notes
- The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
- CPU and RAM usage were both under 80% when the number of maximum users was reached.
- For tested models with expandable memory, the maximum amount of RAM was installed.
Document Viewer
- Yes
Download Station
Maximum Concurrent Download Tasks
- 80
exFAT Access (Optional)
- Yes
Synology MailPlus / MailPlus Server
Free Email Accounts
- 5 (Licences required for additional accounts)
Maximum Number of Concurrent Users
- 450
Maximum Server Performance
- 3,363,000 emails per day, approx. 102GB
Notes
- The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.
- For tested models with expandable memory, the maximum amount of RAM was installed.
- Read-write SSD cache was enabled in 5-bay (and above) NAS models with 2 SSDs units installed.
- The performance of the mail system will slightly decrease in high-availability mode due to data synchronisation between the two servers.
- Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, grey list, content scan, full-text search (English only).
Media Server
DLNA Compliance
- Yes
Moments
Facial Recognition
- Yes
Subject Recognition
- Yes
Auto Colour & Rotate
- Yes
Moments Select
- Yes
Snapshot Replication
Maximum Snapshots per Shared Folder
- 1,024
Maximum of System Snapshots
- 65,536
Surveillance Station
Maximum IP cam (Licences required)
- 75 (including 2 Free Licence)
Total FPS (H.264)
- 2250 FPS @ 720p (1280×720)
- 1050 FPS @ 1080p (1920×1080)
- 600 FPS @ 3M (2048×1536)
- 400 FPS @ 5M (2591×1944)
- 280 FPS @ 4K (3840×2160)
Total FPS (H.265)
- 2250 FPS @ 720p (1280×720)
- 2250 FPS @ 1080p (1920×1080)
- 1125 FPS @ 3M (2048×1536)
- 700 FPS @ 5M (2591×1944)
- 490 FPS @ 4K (3840×2160)
Notes
- Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
- The maximum channel number also includes devices installed on Virtual DSM.
- Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
Synology Drive
Recommended Number of Hosted Files
- 3,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Recommended Number of Concurrent Sync Clients
- 900 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
- For tested models with expandable memory, the maximum amount of RAM was installed.
- Exceeding the limits above may result in longer response time in file operations.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Users
- 2,900
Notes
- Multiple files were opened for testing and each file was edited by 30 users simultaneously.
- CPU and RAM usage were both under 80% when the number of maximum users was reached.
- 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
- Yes
Virtual Machine Manager
Recommended Virtual Machine Instances
- 8
Recommended Virtual DSM Number (Licences required)
- 8 (including 1 Free Licence)
Notes
- The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections
- 40
Package Content
- 1 x DS1621xs+
- 6 x Seagate IronWolf Pro Hard Drives
- 1 x Accessory Pack
- 1 x AC Power Cord
- 2 x RJ45 LAN Cable
- 1 x Quick Installation Guide
Standard Warranty: 5-Years
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- Switch
- VoIP
- Cabling
- Wifi
- Licences
- Display Equipment
- IP Video Door Entry
- Infrastructure
- CCTV
- CCTV/ Security Cameras
- IP Cameras Accessories
- Display & Control
- Digital Video Recorders
- IP Cameras
- Thermal IP Cameras
- Bullet IP Cameras
- Fisheye & Panoramic IP Cameras
- Eyeball IP Cameras
- ANPR IP Cameras
- Indoor IP Cameras
- Corner Mount IP Cameras
- Body Box IP Cameras
- Outdoor IP Cameras
- Covert IP Cameras
- Dome IP Cameras
- Turret IP Cameras
- Security IP Cameras
- PoE IP Cameras
- PTZ IP Cameras
- Network IP Cameras
- Wireless IP Cameras
- Network Video Recorders
- Webcam
- Accessories
- Recorders
- Router / Firewalls
- Storage
- Antenna
- Switching
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