Regardless of your previous experience with RAID arrays, and whether you followed all of the tutorials in this RAID series or not, managing software RAIDs in Linux is not a very complicated task once you have become acquainted with
mdadm --manage command.
Manage Raid Devices with Mdadm in Linux – Part 9
In this tutorial we will review the functionality provided by this tool so that you can have it handy when you need it.
RAID Testing Scenario
As in the last article of this series, we will use for simplicity a RAID 1 (mirror) array which consists of two 8 GB disks (/dev/sdb and /dev/sdc) and an initial spare device (/dev/sdd) to illustrate, but the commands and concepts listed herein apply to other types of setups as well. That said, feel free to go ahead and add this page to your browser’s bookmarks, and let’s get started.
Understanding mdadm Options and Usage
Fortunately, mdadm provides a
built-in --help flag that provides explanations and documentation for each of the main options.
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