You can use RAID 5 only if your storage system has at least three disks. If the disks are not the same size, the smallest of the disks determines how much disk space is available for data. For example, if one disk is 300 GB, one is 400 GB, and one is 500 GB, only 300 GB from each disk can be used. Two thirds of each disk (200 GB) is used for storage space, and the remaining third is used for parity information. As a result, for all three disks, only 600 GB of disk space would be available for data.

•RAID 5 + spare: In this configuration, three of the disks use RAID 5, and the fourth is empty. If any of the three disks fails, it is immediately rebuilt using the fourth spare disk. As a result, you can remove the failed disk and still have the ongoing fast performance and data protection offered by RAID 5. When the failed disk is repaired or replaced and re-installed into the storage system, it automatically becomes the spare for the other functioning three.

You can use RAID 5 + spare only if your storage system has four disks. If the disks are not the same size, the smallest of the disks determines how much disk space is available for data, similar to RAID 5.

•RAID 10: RAID 10 is similar to RAID 1, but rather than having one disk mirror to one other disk, two disks mirror to the two other disks.

You can use RAID 10 only if your storage system has four disks. The disks in the first two slots constitute the first pair, and the disks in the second two slots constitute the second pair. In each pair, the smaller of the two disks is used for data, and the larger of the two disks is used as the mirror.

If one disk in the pair fails, the other disk continues to make its data available.

A.1 Adding Hard Disks

The effect of adding hard disks to your storage system varies, depending on the disk configuration you chose when you configured the system and the current state of the existing disks.

For example, in a linear configuration, you can add a new disk at any time, and data can be written to that disk as soon as it is added. Whether you previously removed a disk or one of the other disks failed makes no difference.

In a RAID configuration, the effect of adding a disk varies, depending on whether the RAID is in a normal or degraded state (as indicated on the Disks page). A normal state indicates that the RAID is functioning properly. A degraded state indicates that one or more disks have been removed or failed, but because of the data protection offered by the RAID, you can continue to

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Freedom9 4020 user manual Adding Hard Disks
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4020 specifications

The Freedom9 4020 is a cutting-edge network interface device designed for a variety of applications, ranging from home use to small business environments. This versatile device is praised for its robust performance, extensive connectivity options, and user-friendly features, making it an excellent choice for those seeking a reliable network solution.

One of the standout characteristics of the Freedom9 4020 is its advanced wireless capabilities. It supports dual-band Wi-Fi, allowing users to connect to both 2.4 GHz and 5 GHz frequencies. This feature ensures optimal performance by minimizing interference and maximizing speed, making it ideal for high-bandwidth tasks such as streaming and gaming.

In terms of connectivity, the Freedom9 4020 is equipped with multiple Ethernet ports, enabling wired connections for devices that require stable and fast internet access. These ports support Power over Ethernet (PoE), which simplifies installation by eliminating the need for separate power supplies for each connected device. This is particularly beneficial in settings where devices like IP cameras or VoIP phones are deployed.

Another key feature is the device's support for advanced security protocols. The Freedom9 4020 utilizes WPA3 encryption, providing enhanced protection for connected networks. This is crucial in today’s environment, where cybersecurity threats are increasingly prevalent. The device also includes features like a built-in firewall and VPN support, enabling secure remote access for users.

The Freedom9 4020 is designed with scalability in mind. Organizations can seamlessly integrate it into existing networks and expand as their needs grow. This flexibility makes it suitable for various applications, from home automation systems to small business networks.

The user interface is intuitive, featuring a web-based management platform that allows users to monitor and control their network easily. This system provides real-time insights into network performance, making troubleshooting straightforward.

Overall, the Freedom9 4020 stands out as a versatile and powerful networking solution. With its robust wireless performance, extensive connectivity options, strong security features, and user-friendly interface, it meets the demands of modern users looking for reliability and efficiency in their network devices.
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