Used Dev Size – the space size used by devices.Array Size – the size of the RAID disk space.Creation Time – the date and time of RAID creation.Let’s consider the main items in the command listing: You can view more detailed information about the specific RAID using this command: To check the state of all RAIDs available on the server, use this command: #echo 'idle' > /sys/block/md0/md/sync_action Then view the output of the following file: #echo 'check' > /sys/block/md0/md/sync_action To check data integrity in the array, use the following command: How to View State or Check the Integrity of a RAID Array? # nano /etc/fstab /dev/md0 /backup ext4 defaults 1 2 First of all, you have to zero all superblocks on the disks to be added to the RAID: I have two extra disks installed on my Linux server, and I want to create a software mirror on them (RAID1). Libreport-filesystem.x86_64 0:2.1.Ĭreating RAID 1 (Mirror) Using 2 Disks on Linux Installing : libreport-filesystem-2.1.86_64 1/2 Mdadm and the dependent libraries will be installed: Running transaction For Ubuntu/Debian: apt-get install mdadm.For CentOS/Red Hat ( yum/dnf is used): yum install mdadm.To install mdadm, run the installation command: Mdadm: How to Install a Software Raid Management Tool? Mdmonitor: RAID State Monitoring & Email Notifications.How to Add a Hot-Spare Drive to an MDADM Array?.How to Add or Remove Disks to Software RAID on Linux?.Recovering from a Disk Failure in RAID, Disk Replacement.How to View State or Check the Integrity of a RAID Array?.Creating RAID 1 (Mirror) Using 2 Disks on Linux.mdadm: How to Install a Software Raid Management Tool?.
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