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【Linux】Server configuration raid1 tutorial (hardware configuration RAID1)

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【Linux】Server creates RAID1 (software configuration RAID1)

1. Frontier

We have already talked about how to configure RAID1 through software, but this has a disadvantage, that is, software configuration needs to be driven by the CPU. Although the hardware cost is relatively low, it is very unstable. Usually, after creating the RAID array, the restart will fail, and the mount will also fail, because after the restart, it does not recognize the RAID array we originally created, so the probability of success is not high. Next, we will introduce how to configure RAID1 through hardware.

2. Hardware Configuration RAID Introduction

Hardware RAID has its own RAID control processing and I/O processing chips, and even array buffers. It has the best CPU occupancy and overall performance among the three types of implementations, but the implementation cost is also the highest. Hardware RAID usually supports hot swap technology, and the faulty disk can be replaced while the system is running. Hardware RAID includes RAID cards and RAID chips integrated on the motherboard. Server platforms mostly use RAID cards. RAID cards are composed of RAID core processing chips (CPU on RAID cards), ports, cache, and batteries. Among them, ports refer to the disk interface types supported by RAID cards, such as IDE/ATA, SCSI, SATA, SAS, FC and other interfaces.

The hardware RAID used in this article is based on an array integrated on the motherboard.

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