Home DIY NAS on Raspberry Pi 4 - backup, backup, backup

RAID vs RSync

One of the main reasons for NAS is - in addition to the convenience of having everything together - a backup of data. In NAS users typically used RAID. Depending on the number of disks, you can choose the RAID type according to the desired features/advantages. But beware! RAID is not a full backup. Typically, using RAID 1 in the case of two spinning disks increases the robustness of the solution, i.e. if one spinning disc is damaged, you have the same data on the second disc. But what if you damage/delete data on first disc? This action will also be performed on your mirrored disk. What happens in the case of cryptovirus? Encrypts data on both drives.

In a home environment, we recommend automatically copying the data to a second disk. For these purposes, there is an RSync tool in Linux world. You can set an automatic backup of the entire content or specific folders for each night or as needed. It can even keep the same content as the primary disc and keep files that have already been deleted on the primary disc. If you make a mistake, your data will be available on a second disc for some time. Only the special user has access to the second disc, so the cryptovirus can't get in. At least not for old content.

Rsync settings

Firstly, you must have Shared Folders on primary and secondary disc. To distinguish them easily, the main folder on drive A is called Photo and the folder where the backup on drive B will be made is named PhotoBackup in example.

Under Rsync tab, turn on the server service. Then switch to Jobs and add a job that runs a backup at a given time of the week. On the screenshot below is a Photo backup setting from A to PhotoBackup folder on B, each day at 3:00 a.m. There is no deletion of photos that no longer exist on drive A. Of course, this can be changed in the Delete box settings.

Pi-NAS - home Rsync backup

What else?

But even this solution is not a full-fledged backup. In any case, you must have an old USB drive or network location, where you copy the NAS contents once every 6 months and place the disk preferably in a safe or somewhere safe outside your house. This will protect your photos and data from fire and other catastrophic scenario. Do not forget for this kind of offline copy!

Add comment

Nejlepší články z blogu

Victron & OpenHAB
Victron vs Smart HomeRating: 

In this post, we will show you how to retrieve information from a photovoltaic power plant by Victron. We will connect to the Cerbo unit via MQTT. Based on these values, we can control various appliances (heating, boiler, etc.) and prevent the battery from being drained when they don't need to be.

Smart Home GoodWe inverter
Smart Home vs GoodWeRating: 

In the post, we will demonstrate step by step how to communicate directly with the GoodWe inverter in a smart home setup and obtain real-time information (unlike the SEMS portal). This information is essential if we want to react to current parameters in a smart home, such as activating additional cooling or controlling a socket with a various load.

Voice control smart home
Voice control of the houseRating: 

In this article, we will connect the Amazon Echo Dot voice assistant with open source home automation. We won't be using OpenHAB Cloud, so everything runs locally. In this case, a few additional settings are necessary, but the result is worth it!

MikroTik - Winbox, DHCP, Ranges
Basics - Winbox, DHCPRating: 

In this series, we will look at the step-by-step setup of MikroTik devices for home users or a small business (up to 25 people). In the first article, we will focus on the initial setup - we will download Winbox and set up DHCP for the primary network and guest network. Similarly, we will also adjust the WiFi settings.

Alarm Smart Home PIR
Alarm from existing PIR sensors in a smart home.Rating: 

In a your smart home, PIR sensors may not only be used to switch lights on and off based on motion, it is possible to utilize these sensors to detect the presence of motion in a particular room. This information can be used to create a relatively reliable uncertified home security system. In this guide, you will find the logic for how this can work in the OpenHAB software in our model smart home.

NFC Tag Example in Smart Home
NFC tags in smart homeRating: 

NFC (Near Field Communication) tags are small plastic or paper stickers that can be used to automate various functions in the smart home. In this article, we will show you examples of use and a guide on how to write an action on an NFC tag using a mobile phone.

WireGuard iOS
WireGuard on iOS devicesRating: 

In this article, you will find a detailed guide on how to connect to WireGuard VPN from iOS.

WireGuard on Android device
WireGuard on Android devicesRating: 

In this article, you will find a detailed guide on how to connect to WireGuard VPN from Android.

WireGuard on MikroTikRating: 

This article describes the self setup of the WireGuard VPN protocol on MikroTik devices with RouterOS version 7 and higher. This phenomenal VPN is very fast, secure, and easily configurable in a home environment. It can be said that it is currently the best VPN for home use available.

Nilan VP18 vs OpenHABRating: 

We provide tutorial for the connection of the active Nilan recuperation unit, in our case the VP18 K WT type with OpenHAB 3. By communicating via Modbus it is possible to read the whole range of values, but mainly also to control the unit through OpenHAB. This allows us to remotely or programmatically change the performance and ventilation settings depending on the mode (night, cooking, etc.)