![]() To make sure our data are safe during a disk failure RAID is the best option to implement in our environment. Conclusionĭata is the most important thing while we consider during a server set up in a real-time production environment. However, most of all RHEL based Linux distributions can follow this guide. In our guide, we will be using CentOS Linux server 8. Let’s start to create the software raid in anyone of Linux server. Spares will not be used until unless any one of the disks fails in an array. Moreover, during failures, if a spare disk available then it will be used while recovery kicks in. In case, anyone of disk failed the recovery process will kicks in and start to rebuild the RAID group by itself. When we combine the number of disks and create a RAID it can be called as RAID set, RAID Array or RAID group to form a logical disk with resilience against the drive failures. Reduced storage 1/2, Limited scalability. Write Performance + Strong Fault tolerance Low write performance, Reduced storage by 2/5. Little lag in write OPS, Reduced stotage 1/3.Įxtra level of Redudancy with High Speed performance Little lag in write OPS, Reduced stotage 1/2. RAID LEVELįault tolerance and high read performance In our upcoming guides, all the raid levels will be briefly covered with examples. However, we will focus on only the levels commonly used in a production environment. The levels of RAID are listed as follows. They have their own BIOS inbuild in it, we need to configure the RAID levels and options from it before installing any operating Systems on the top of the RAID device. Hardware raid will be a PCI or PCI-E card or integrated on the motherboard. By combing multiple disks a RAID array can be created with the help of mdadm. To implement the software raid Linux comes with MD driver, to create and manage the same we can use “ mdadm” utility. ![]() Throughout this guide, we are going to use a Linux RAID or can be called as software RAID. There are two types of RAID’s they are software raid and hardware raid. In case, a single disk failed we will be still on the safer side and won’t lose any data. For example, While we write a data the content will be spread across multiple disks and highly available from the multiple sources. RAID won’t work as a single disk, minimum of two or more disks will be used to form a RAID. How to create a Nested RAID 10 or 1+0 in Linux.How to configure RAID 6 (double distributed parity) in Linux.Configure RAID 5 (striping with distributed parity) in Linux. ![]()
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