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Synology DiskStation DS1821+

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General

   
Cooling Active  
RAID Yes  
Type of RAID
JBOD
RAID 0
RAID 1
RAID 10
RAID 5
RAID 6
 
Wake on LAN Yes  

Connectors

   
Data link protocols Gigabit Ethernet  
eSATA Yes  
Firewire No  
HDMI No  
Optical fiber no  
Thunderbolt No  
USB Yes  
USB (total)  4 ​  
USB 2.0 No  
USB 3.1 Gen 1 (5Gbps)  4 ​  
USB 3.2 Gen 2 (10Gbps) No  
USB 3.2 Gen 2x2 (20Gbps) No  

Connections - Internal

   
IDE/PATA No  
SAS No  
SATA (Serial ATA) Yes  
SATA interface S-ATA/600  
SCSI No  

Dimensions

   
Dimensions (WxHxD) 343 × 166 × 243 mm  
Product weight  6 kg  

Features

   
Designed for rack mounting No  
Features DLNA, Supports Hot-swap  

Communication

   
Client services BitTorrent  
Ethernet connection Yes  
Number of Ethernet ports (RJ-45)  4 ​  
Number of SFP+ ports No  
Speed 10/100/1000 (Gigabit) Mbit/s  
Server services/protocols
AFP
CIFS/SMB
FTP
HTTP
iSCSI
NFS
SFTP
 
Wireless network (Wi-Fi) No  

Compatibility

   
ActiveDirectory Yes  
ECC Yes  
Fully supported file system (external)
BTRFS
ext3
ext4
FAT32
HFS+
NTFS
 
Fully supported file system (internal) BTRFS, ext4  
x86-compatible processor Yes  

Storage

   
Built-in hard drive No  
Form factor 2.5 inch, 3.5 inch  
Internal transfer rate  
Number of hard drive slots  8 ​  
Price/TB  

Audio features

   
Noise level 22.2 dB  

Memory

   
RAM  4,096 MB  

Software

   
Operating system DiskStation Manager (DSM)  

Processor

   
Processor core type 4 (Quad) Core  
Processor model Other / Unspecified  
Processor speed  2.2 GHz  

Power supply

   
Operational Power Consumption (min-max) 29.39 - 66.96 W  
Power consumption (standby)  

Links

     
Product page https://www.synology.com/en-us/products/DS1821+ gb_flag
Manual https://global.download.synology.com/download/Document/Hardware/HIG/DiskStation/21-year/DS1821%2B/enu/Syno_HIG_DS1821%2B_enu.pdf gb_flag
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