SSD cache
Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache
A powerful storage solution for businesses and IT enthusiasts with redundancy and service continuity features.
The RS1221+/RS1221RP+, at only 30 to 38 centimeters deep, is built for space-sensitive deployments. Boasting over 100K 4K random read IOPS and 2,315 MB/s sequential read, the RS1221+/RS1221RP+ is equipped to handle heavy workloads in data-intensive environments. The RS1221RP+ additionally features an extra level of protection with redundant power supplies.
The RS1221+ and its RX418 expansion units are designed to help you save space in compact deployments. At only 30 centimeters, half the length of a typical 2U unit, it fits perfectly snug onto 2-post or shallow rackmount enclosures. The RS1221RP+ with dual power supplies comes in at 38 cm, also fitting most shallow depth enclosures.
Reduce the chance that power disruptions on a single distribution channel or PDU causes data and service availability degradation.
When paired with another identical unit, Synology High Availability enables automatic minute-level failover between two clustered servers in the event of a server failure to minimize service downtime.
ECC memory and the Btrfs file system bring higher reliability and snapshot capabilities to help prevent data corruption and simplify data protection.
Up to 2,315/1,147 MB/s sequential read and write throughput and over 100K/54K random read/write IOPS ensures ample performance for demanding workloads.
Easily upgrade the RS1221+/RS1221RP+ to match your usage environment, whether it’s for performance, faster networking, or higher storage capacity.
Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache
Improve I/O with faster SFP+ or RJ-45 networking
Expand to 12 drive bays with a RX418 expansion unit
A comprehensive backup and recovery solution for added data protection. Create backup destinations locally, on another Synology device, rsync servers, or cloud-based destinations, such as Google Drive, Dropbox, S3-compatible destinations, and Synology C2 Storage, a dedicated backup destination for Synology devices. Deduplication, integrity checks, and incremental transfer technology reduce bandwidth and storage use.
Easily schedule flexible point-in-time backups of shared folders and LUNs with an RPO as low as 5 minutes and recovery in seconds. Set up replication and failover to other Synology storage systems for fast RTOs and minimal service disruption.
The Active Backup suite enables administrators to easily secure their entire IT infrastructure by backing up mission-critical data to their NAS, including Windows & Linux workstations and servers, file servers, VMware and Hyper-V virtual machines, and Microsoft 365 and Google Workspace accounts. Benefit from deduplication, multiversioning to quickly jump back in time, and additional data efficiency optimizations for reduced bandwidth and storage use.
Synology iSCSI storage fully supports mainstream virtualization solutions to enhance work efficiency with an easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations. Windows Offloaded Data Transfer (ODX) speeds up data transfer. OpenStack Cinder support turns your Synology NAS into a block-based storage component. Additionally Synology Storage Console enables even more simplified storage provisioning and management options in VMware and Windows environments.
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 |
12 (RX418 x 1) |
|
Compatible Drive Type* (See all supported drives) |
· 3.5" SATA HDD · 2.5" SATA HDD · 2.5" SATA SSD |
|
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. |
|
External Ports |
RJ-45 1GbE LAN Port |
4 (with Link Aggregation / Failover support) |
USB 3.2 Gen 1 Port* |
2 |
|
eSATA Port |
1 |
|
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 |
Form Factor (RU) |
2U |
Size (Height x Width x Depth) |
RS1221+ :88 mm x 482 mm x 306.6 mmRS1221RP+ :88 mm x 482 mm x 407.5 mm |
|
Weight |
RS1221+ :6.9 kgRS1221RP+ :11.7 kg |
|
Rack Installation Support* |
RS1221+ : · 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02) · 2-post 19" rack (direct mounting) RS1221RP+ :4-post 19" rack (Synology Rail Kit - RKS-02) |
|
Notes |
The rail kit is sold separately |
|
Others |
System Fan |
80 mm x 80 mm x 2 pcs |
Fan Speed Mode |
· Full-Speed Mode · Cool Mode · Quiet Mode |
|
Power Recovery |
Yes | |
Noise Level* |
RS1221+ :37.8 dB(A)RS1221RP+ :53.5 dB(A) |
|
Scheduled Power On / Off |
Yes | |
Wake on LAN / WAN |
Yes | |
Power Supply Unit / Adapter |
RS1221+ :250 WRS1221RP+ :350 W |
|
Redundant Power Supply |
RS1221+ :- RS1221RP+ : Yes |
|
AC Input Power Voltage |
100 V to 240 V AC |
|
Power Frequency |
50/60 Hz, Single Phase |
|
Power Consumption |
RS1221+ :49.89 W (Access) 22.64 W (HDD Hibernation) |
|
British Thermal Unit |
RS1221+ :170.23 BTU/hr (Access) 77.25 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 35°C (32°F to 95°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 · UL · VCCI · RCM |
|
Warranty |
3-year hardware warranty, extendable to 5 years with Extended Warranty Plus |
|
Notes |
The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) |
|
Environment |
RoHS Compliant |
|
Packaging Content |
RS1221+ : · Main Unit X 1 · Accessory Pack X 1 · AC Power Cord X 1 · C13 to C14 power cord x 1 · Quick Installation Guide X 1 RS1221RP+ : · Main Unit X 1 · Accessory Pack X 1 · AC Power Cord X 2 · Quick Installation Guide X 1 |
|
Optional Accessories |
RS1221+ : · DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G · Expansion Units: RX418 · Enterprise Series 3.5" SATA HDD: HAT5300 Series · Plus Series 3.5" SATA HDD: HAT3300 Series · Enterprise Series 2.5" SATA SSD: SAT5200 Series · M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 · M.2 SSD Adapter Card: M2D20/M2D18 · 25GbE Network Interface Card: E25G30-F2 · 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 · Rail Kit Sliding: RKS-02 · Rail Kit Mounted: RKM114* RS1221RP+ : · DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G · Expansion Units: RX418 · Enterprise Series 3.5" SATA HDD: HAT5300 Series · Plus Series 3.5" SATA HDD: HAT3300 Series · Enterprise Series 2.5" SATA SSD: SAT5200 Series · M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 · M.2 SSD Adapter Card: M2D20/M2D18 · 25GbE Network Interface Card: E25G30-F2 · 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 · Rail Kit Sliding: RKS-02 |
|
Notes |
RS1221+ : · Certain items may not be available in your location. Please contact your local distributors for more information. · Upgrade to DSM 7.2-64551 or later before installing the M2D18. · All memory modules will operate at the maximum frequency specified by the CPU manufacturer. RS1221RP+ : · Upgrade to DSM 7.2-64551 or later before installing the M2D18. · 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 |
|
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 |
· 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 |
Hybrid Share Folder Number |
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 |
||
Antivirus by McAfee (Trial) |
Yes | |
Central Management System |
Yes | |
Synology Chat |
Suggested Maximum Users |
1,500 |
Suggested Concurrent Users |
150 |
|
Notes |
When applicable, tested systems are 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 |
Yes | |
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 |
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