CX18116-V3

Overview
- DVS (Distributed  Video  Storage), is launched to meet the large-scale centralized or distributed storage requirements  of AIoT. It provides storage virtualization management capabilities, consolidates all storage node spaces into a single storage virtual pool, and provides massive storage space management. The CX18116-V3 is the storage node of the  DVS. It is based on the  IMOS  cloud architecture and focuses on storage services such as video images. It has the characteristics of high performance, high reliability, high density, high scalability, and high usability, providing users with  a comprehensive AIoT application storage solution.
Features
Direct Storage 
- Supports direct storage of videos and images without the need for streaming servers, saving total investment
- Supports ONVIF standard protocol front-end access
- Supports intelligent structured data storage for videos
High performance
- Supports direct storage of raw data blocks, no file system fragmentation, and no degradation in storage performance for massive small files
- Supports data discretization and concurrent reading and writing of multiple storage nodes
- Cache algorithms for videos
- Optimized read/write cache management algorithm, greatly improving access performance and extending the lifespan of HDDs 

High reliability
- The storage architecture reduces the Single point of failure of the servers
- Failover，when a node fails, other nodes will automatically take over and balance services.

- Automatic disk inspection and repair
The unique hard disk fault-tolerant processing algorithm ensures service continuity even when multiple disk errors exist in the array. Fault sectors can also be automatically repaired.
- Fast disk reconstruction
Data can be copied to a hot spare disk within a short period. This substantially reduces the read I/O of disk, speeds up the reconstruction, and avoids data loss.
- RAID superblock backup
Array composition is not affected when data in a certain sector cannot be read. In addition, damaged data can be repaired by using the backup sector to improve array reliability.
- Disk protection
Once a disk error is detected, the disk repair process would automatically start. Data in the failed disk is recalculated from other disk in the array to remap the   bad blocks of disk.
- Data safe box
Online embedded UPS protection and data safe box are provided to ensure secure writing of cache data into data safe box at unexpected power-off without data loss.
High-Quality Hardware Design
- High density
The innovative enclosure with 4U height that holds up to 116 disks, is space -saving

- Carrier-class applications with high availability
The application of Intel 64-bit server platform architecture, 64-bit multi-core processor, ECC DDR5 memory, and 64-bit storage OS ensure excellent service continuity by providing stable and reliable data access. The system availability reaches up to 99.999%.
- Watchdog
The system would be forced into the security mode in case of a failure. High-speed cache data is stored in the data safe box. Storage media in the data safe box can roam to the new system together with the array disk. The system can be  recovered securely and conveniently.
- Dual BIOS 
When the active BIOS fails to start, the system automatically detects the failure and switches to the standby BIOS. This  ensures reliable system startup and BIOS update.
- Redundant power supplies

The hot-swappable power supply is designed in redundancy and load balancing mode. Automatic power switching in case 
of failure and online replacement of failed power supply are supported.
- Overload protection
The mechanism of hardware overload protection is provided. When the temperature reaches the protection threshold, the system automatically turns off to protect the disk data. When CPU and memory malfunction or reach the protection threshold, the system automatically sends alarm messages through mails, short messages, and SNMP Trap.
- Power protection
Disk powered on sequentially during system startup, protection from impulse current.

- Multistage fan speed and energy saving

Fans with multistage speed are configured in the hot-swappable frame in redundancy mode. System power consumption can be balanced intelligently with heat dissipation calculation to ensure low power consumption and stable operation of the system.
- Convenient maintenance
Functions as indicator alarm, mail alarm, SNMP Trap alarm and SMS alarm are supported. 
Automatic startup after unexpected power-off, and timed startup and shutdown are also available.
The environmental monitoring function allows the monitoring of the utilization of network interface and CPU, the querying  of the access of LUN and RAID, as well as the management of device voltage and temperature. In this way, administrators can comprehensively inspect system operation condition and reasonably allocate resources to maximize the device performance.
Green Technology and Energy Conservation
- Selected power supplies with high PF and conversion efficiency
- Intel CPU with cutting-edge process technology and advanced architecture
- Particularly selected chips with low power consumption for service model of video surveillance 
- Unique simplified design of board
Reduced component type and quantity, under the affirmatory premise of the function, performance and reliability
- Multistage fan speed
Several temperature sensors are configured and built inside to intelligently control the fan speed.
- Hibernation for unoccupied disks
- Intelligent cache design
Reasonably sort and buffer the read/write data by intelligent algorithm reduce the disk read/write times，and reduce the hard disk power consumption