Synology RackStation RS4021XS+ NAS/storage server Rack (3U) Ethernet LAN Black D-1541

Intel Xeon D-1541, 8-core 2.1 (base) / 2.7 (turbo) GHz, 16 GB DDR4 ECC UDIMM, 16 Drive Bays, 3U

Description

Securing your business assets The 16-bay RS4021xs+ provides solid data security and lightening-fast performance with over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput1. Together with its 8-core processor, ECC memory, advanced snapshot technology, and built-in 10GbE connectivity, the RS4021xs+ can support large multi-user environments while handling data-intensive workloads. Engineered for service continuity The RS4021xs+ ensures mission-critical data is always available, enabling businesses to deliver the best results, even in the face of disaster. Redundant power Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system. Maximize service availability Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover. Next-generation file system Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots Customize to your business The RS4021xs+ includes two PCIe slots for performance, networking, and storage upgrades enabling it to adapt to any business environment2. Double bandwidth Upgrade network bandwidth in minutes by 2x or more with Synology’s range of 10GbE NICs. SSD cache3 Boost read/write IOPS by up to 16 times by enabling SSD cache with our Synology M.2 NVMe adapter cards and SNV3500 SSDs, or by installing one or more 2.5” SAT5200 SSDs. Storage expansion Quickly and easily scale up to 40 drives with two RX1217(RP) expansion units. Hyper Backup A comprehensive backup and recovery solution for securing data stored on Synology servers. Backup data locally, to another Synology device, rsync server, or cloud-based storage such as Google Drive, Dropbox, S3-compatible destinations, and Synology C2. Deduplication4, integrity checks, and incremental transfer technology reduce bandwidth and storage used. Snapshot Replication Easily schedule flexible point-in-time backups of shared folders and iSCSI 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. Storage for virtualization Synology iSCSI storage supports mainstream virtualization solutions with an easy management interface to enhance usability. VMware vSphere 6.5 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 All-in-one surveillance solution Synology Surveillance Station transforms the RS4021xs+ into a feature-packed Network Video Recorder solution. Support for up to 90 IP cameras5 and video analytics such as motion detection, no idle zone, foreign object detection, and anomaly detection cater to the most common surveillance scenarios. Secure and private AES-256 encryption keeps locally-stored footage secure. Access from anywhere, anytime Access recordings and live streams whenever you want using a web browser, desktop client, or the DS cam mobile app. Real-time alerts Email, SMS, or push notifications alert you when incidents occur or predefined conditions are met.

Specifications

Storage
Storage drives installed	No
Installed storage drive type	No
Supported storage drive types	HDD & SSD
Number of storage drives supported	16
Storage drive interface	Serial ATA II, Serial ATA III
RAID support	Yes
RAID levels	5, 6
Storage drive sizes supported	2.5,3.5"
Processor
Processor manufacturer	Intel
Processor boost frequency	2.7 GHz
CPU configuration (max)	1
Conflict-Free processor	Yes
Processor frequency	2.1 GHz
Processor family	Intel® Xeon®
Processor model	D-1541
Processor cores	8
Number of processors supported	1
Memory
Internal memory type	DDR4
Internal memory	16 GB
Maximum RAM supported	64 GB
Memory slots	4
Memory form factor	UDIMM
ECC	Yes
Network
Ethernet LAN data rate supported (max)	10000 Mbit/s
Ethernet LAN	Yes
Wake-on-LAN ready	Yes
Ports & interfaces
USB port	Yes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2
PCI Express x8 (Gen 3.x) slots	2
Ethernet LAN (RJ-45) ports	6
Hard drive
RAID support	Yes
RAID levels	5, 6
Design
Built-in speaker(s)	No
Cooling type	Active
Fan diameter	8 cm
Built-in display	No
Product colour	Black
Number of fans	3 fan(s)
Chassis type	Rack (3U)
Technical details
Type	Storage server
Device class	Small & Medium Business
Backup function	Yes
Built-in display	No
Product colour	Black
Noise level	44.7 dB
Chassis type	Rack (3U)
Number of fans	3 fan(s)
Harmonized System (HS) code	84714100
Performance
Type	Storage server
Device class	Small & Medium Business
Backup function	Yes
On/off switch	Yes
Noise level	44.7 dB
Cooling
Cooling type	Active
Fan diameter	8 cm
Number of fans	3 fan(s)
Management features
On/off switch	Yes
Power
Power consumption (HDD standby)	62.68 W
Power supply unit (PSU) capacity	800 W
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Redundant power supply (RPS) support	Yes
Power consumption (typical)	145.79 W
Weight & dimensions
Width	482 mm
Depth	656.5 mm
Height	132.3 mm
Weight	17.4 kg
Packaging content
Power cables quantity	2
Processor special features
Intel VT-x with Extended Page Tables (EPT)	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes
Intel Virtualization Technology (VT-x)	Yes
Intel TSX-NI version	1.00
Intel TSX-NI	Yes
Intel Trusted Execution Technology	Yes
Intel Secure Key Technology version	1.00
Intel Enhanced Halt State	Yes
Intel 64	Yes
Idle States	Yes
Execute Disable Bit	Yes
Enhanced Intel SpeedStep Technology	Yes
Embedded options available	No
Operational conditions
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 35 °C
Operating relative humidity (H-H)	5 - 95%
Certificates
Certification	FCC CE BSMI VCCI RCM EAC CCC KC UL
Logistics data
Harmonized System (HS) code	84714100