12/20/2023 0 Comments Uninstall softraidThis is the all-important step that is easily overlooked. Each array member drive will have its own superblock to store RAID information. Okay, so the member drive has been removed, but it will still insist that it is part of an array because the former RAID array configuration is still stored on the drive in its superblock. Zero the Superblock on the Removed Member Drive If you remove a drive from a RAID-5 array that only has three drives, then you will lose all of your data because RAID-5 requires at least three drive to operate. However, if you remove a drive from a RAID-0 array, then you will lose all of your data. In this example, there was an extra hard drive for redundancy (/dev/sde). Important Note: Only remove a drive from an array that supports removal without losing data. sudo mdadm -fail /dev/sde -remove /dev/sde We need to tell mdadm to “disconnect” or “remove” the drive as part of /dev/md1’s RAID configuration. Remove the Drive using mdadmĭo not physically remove the drive from the computer yet (if that is your plan). We must stop the array in order to remove a drive permanently, but before that, we must unmount the array if it is mounted and in use by the operating system. Suppose the RAID array is mounted at /media/myraid. For whatever reason - a failed drive, a new RAID configuration - we want to remove /dev/sde from the existing array /dev/md1. This result shows details about the /dev/md1 array. Let us assume the RAID array is named /dev/md1, and the drive we want to remove permanently is /dev/sde. This article tested these commands on Linux Mint 20 running a RAID array using the software RAID manager mdadm (free from the repository). sudo mdadm –fail /dev/sde –remove /dev/sde.The member drive was removed from the RAID array using mdadm, but the system still sees that drive as part of the array.
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