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Editor to share with you what is the use of Linux disk array, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Linux disk array is used to protect system data, so let's start with disk array, and then describe in detail how to complete the configuration of Linux disk array on Linux system. I believe you must have gained a lot after reading this article. I hope this article can teach you more.

Configure disk arrays: function: prevent data loss

RAID: redundant Array:

Save multiple data at the same time: mirror:

While saving the data (only one copy), save some additional information (parity information), which can be used to recover the source data.

RAID1: mirroring volum

RAID5: stripe volume with parity information

RAID1: 50% utilization of 2 disks

RAID5 must have at least 3 disks, disk utilization (NMMI 1) / N

As the hard disk in the disk array, it has the same specification and the same capacity.

The tool used is MDADM

The role of the mdadm.conf file: controls the automatic generation of configured RAID devices when the system starts

Echo "DEVICE / dev/hd* [0-9] / dev/sd* [0-9]" > / etc/mdadm.conf

Mdadm-detail-scan > > / etc/mdadm.conf

Partition: FDISK / DEV/SDG

Create a RAID:

Mdadm-- create / dev/md0-- level=1-- raid-devices=2 / dev/sdg [56]

View RAID status: cat / proc/mdstat

Format RAID devices: MKFS-T EXT3 / DEV/MD0

Create a directory: MKDIR-P / DISK/MD0

Load: MOUTN / DEV/MD0 / DISK/MD0

Generate MDADM.CONF file by command

This completes the configuration of the Linux disk array. There may also be some questions, and I would like to say:

Configure boot to load automatically, restart difficulty

Vi w.c

# include "stdio.h" main () {printf ("hehe\ n");}

Compile command: gcc-o W.O W.C

These are all the contents of the article "what is the use of Linux disk arrays?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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