User's Manual

Chapter 1: Before You Start

Hardware Specication

Item RS4021xs+

Compatible Drive Type 3.5"/2.5" SATA x 16

Maximum Drive Bays with

Expansion Unit

40 (RX1217/RX1217RP x 2)

External Port

• USB 3.0 x 2

• Inniband x 2

LAN Port

• 1GbE RJ-45 x 4

• 10GbE RJ-45 x 2

PCIe Slot Gen3 x8 slots (x8 link) x 2

Size (H x W x D) (mm)

• 132.3 x 430.5 x 624.5

• 132.3 x 482 x 656.5 (with server ears)

Weight (kg) 17.4

Supported Client

• Windows 7 onward

• macOS 10.12 onwards

File System

• Internal: Btrfs, ext4

• External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT

Supported RAID Type

• Basic • JBOD • RAID 0 • RAID 1

• RAID 5 • RAID 6 • RAID 10 • Synology RAID F1

Agency Certication

• FCC Class A • CE Class A • BSMI Class A

• EAC • VCCI • CCC • RCM • KC • UL • RoHS Compliant

HDD Hibernation Yes

Scheduled Power On/O󰀨 Yes

Wake on LAN Yes

Language Localization

Environment Requirement

• Line voltage: 100 V to 240 V AC

• Frequency: 50/60 Hz

• Operating Temperature: 32 to 95˚F (0 to 35˚C)

• Storage Temperature: -5 to 140˚F (-20 to 60˚C)

• Relative Humidity: 5% to 95% RH

Note:

Model specications are subject to change without notice. Please refer to

www.synology.com

for the latest information.

Support for exFAT can be enabled by purchasing and downloading exFAT Access in Package Center.