mdadm
mdadm provides a convenient, single-command interface for managing software arrays under Linux. While mdadm is fully functional without the use of a configuration file, it does support a configuration file, /etc/mdadm.conf, which is more concise and straightforward than /etc/raidtab. With mdadm, the configuration file is created after arrays, as a way to preserve information for arrays and member disks, so that they can be reactivated later. mdadm can be used as a total replacement for raidtools.
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