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DS1621XS+ |
Description: | Synology DiskStation DS1621xs+ - NAS - Desktop - Intel® Xeon® D - D-1527 - Black (DS1621XS+) |
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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.

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Replacements shipped in 10 days or less.
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DS1621XS+ Overview
DS1621XS+ is a high-performance NAS featuring 6 drive bays that support SATA HDD and SATA SSD, delivering a total storage capacity of up to 96 TB. It supports RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10 configurations and is powered by an Intel Xeon processor with 4 cores, paired with 8 GB of pre-installed ECC DDR4 memory that is expandable up to 32 GB.
DS1621XS+ offers dual 10GbE network ports and USB 3.2 connectivity with hot-swap drive support and expansion capabilities for additional storage. It is equipped with active, redundant fan cooling and a redundant power supply rated at 350W, making it ideal for SMB backup, enterprise data centers, virtualization, and media server use cases.
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DS1621XS+ Specifications
Product Type | Storage System |
Storage Type | NAS |
Form Factor | Rackmount |
Bay Count | 6-bay |
Supported Drive Types | Mixed |
Hot-Swap Support | Yes |
Max Supported Capacity | 96 TB |
RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
CPU Type | Intel Xeon |
CPU Cores | 4 |
Installed RAM | 8 GB |
Max RAM Capacity | 32 GB |
RAM Type | ECC DDR4 |
Network Ports | 10GbE |
LAN Ports | 2 |
USB Ports | USB 3.2 |
Expansion Support | Yes |
Cooling | Redundant Fan |
Power Supply | Redundant |
Power Supply Wattage | 350W |
Operating System | QTS |
Snapshot Support | Yes |
Cloud Sync Support | Yes |
Virtualization Ready | Yes |
ISCSI Support | Yes |
Surveillance Support | Yes |
Use Case | Enterprise Data Center / Virtualization / SMB |
Product Name | QNAP DS1621XS+ |
Height | 10.9 inches |
Width | 17.2 inches |
Depth | 10.4 inches |
Weight | 25.7 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.







Product Comparison Table
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Bay Count | 12-bay | 24-bay | 24-bay | 12-bay | 6-bay |
Cloud Sync Support | Yes | Yes | No | Yes | Yes |
Cooling | Redundant Fan | Redundant Fan | Active | Redundant Fan | Redundant Fan |
CPU Cores | 8 | 8 | N/A | 8 | 4 |
CPU Type | Intel Xeon | Intel Xeon | N/A | Intel Xeon | Intel Xeon |
Depth | 25 inches | 25.0 inches | N/A | 28 inches | 10.4 inches |
Expansion Support | Yes | Yes | Yes | Yes | Yes |
Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
Height | 3 inches | 3.5 inches | N/A | 3 inches | 10.9 inches |
Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
Installed RAM | 16 GB | 16 GB | 8 GB | 128 GB | 8 GB |
iSCSI Support | Yes | Yes | N/A | Yes | Yes |
LAN Ports | 2 | 2 | N/A | 2 | 2 |
Max RAM Capacity | 64 GB | 64 GB | N/A | 128 GB | 32 GB |
Max Supported Capacity | 1 PB | 512 TB | N/A | 1 PB | 96 TB |
Network Ports | 10GbE | 10GbE | Fibre Channel | 10GbE | 10GbE |
Operating System | Custom OS | Custom OS | N/A | Custom OS | QTS |
Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
Power Supply Wattage | 500W | 500W | N/A | 750W | 350W |
Product Name | K2R18A Enterprise Storage System | E7V99A Enterprise SAN Storage System | Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays | 55V3-128G-DC216 | QNAP DS1621XS+ |
Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
RAM Type | ECC DDR4 | ECC DDR4 | N/A | ECC DDR4 | ECC DDR4 |
Snapshot Support | Yes | Yes | No | Yes | Yes |
Storage Type | NAS | SAN | SAN | NAS | NAS |
Supported Drive Types | Mixed | Mixed | SATA HDD / SAS HDD / SATA SSD | Mixed | Mixed |
Surveillance Support | Yes | No | No | Yes | Yes |
USB Ports | USB 3.2 | USB 3.0 | N/A | USB 3.2 | USB 3.2 |
Use Case | Enterprise Data Center | Enterprise Data Center | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | Enterprise Data Center / Virtualization / SMB |
Virtualization Ready | Yes | Yes | Yes | Yes | Yes |
Weight | 25 lbs | 45 lbs | N/A | 35 lbs | 25.7 lbs |
Width | 17 inches | 17.5 inches | N/A | 17 inches | 17.2 inches |
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