EOL 16-slot Cost-efficient Super Capacity Storage 15*20 TB IoT SMR enterprise HDD IoT fully sealed helium HDD technology Surveillance-specialized direct storage (Direct Streaming mode) Highly cost efficient, safe and reliable Energy saving and space saving Easy operation and maintenance SMR HDD providing 5-year warranty Add to Favorites Cache12 GB, extendable to 32 GB Processor64-bit multi-core processor Storage Management Disk ManagementDisk detection, pre-alarm, and repair Logical Volume ManagementRecording volume management Recording Management Recording ModeContinuous recording, manual recording, and alarm recording Video ProtectionVideo lock, video loss alarm Searching ModeLog in storage system to search, play, and download videos. Support searching videos by time, event type, and smart information Downloading ModeLog in storage system to search, play, and download videos. Support searching videos by time, event type, and smart information Network ProtocolRTSP;ONVIF;HKSDK Device Maintenance Management ModeGUI based on web, serial port CLI, platform Alarm ModeAudio, indicator, GUI Storage HDD Slot16 Interface/CapacitySATA, Up to 20TB RAIDRAID5, RAID6, iRAID Performance Video Performance256 Picture Performance50 Direct Streaming Mode: Video (2 Mbps) Picture256-ch General Power Supply100 to 127 VAC or 200 to 240 VAC/47 to 63Hz, redundant power supply Consumption (With HDDs)≤ 255 W Environment TemperatureWorking: 5 °C to 40 °C (41 °F to 104 °F) Storing: -20 °C to 70 °C (-4 °F to 158 °F) Environment HumidityWorking: 20% to 80%RH (non-condensing/frozen) Storing: 5% to 90%RH (non-condensing/frozen) Dimension (W × H × D)486 x 535 x 134 mm (19.2 x 21.1 x 5.3 in) Weight (Without HDDs)≤20kg (44.1 lb) External Interface USB2, USB 3.0 Data Network Interface3, 1000 Mbps Ethernet interface MiniSAS Interface2 COM1, RS-232 Management Network Interface1, 1000 Mbps Ethernet interface HDD HDD ModelHikvision,HK7220AH,20T SKU: DS-AT1000S/300 Category: HiKvision Hybrid SAN