управлять MD-устройствами, также известными как Linux Software RAID (manage MD devices aka Linux Software RAID)
BUILD MODE
Usage: mdadm --build md-device --chunk=X --level=Y
--raid-devices=Z devices
This usage is similar to --create. The difference is that it
creates an array without a superblock. With these arrays there
is no difference between initially creating the array and
subsequently assembling the array, except that hopefully there is
useful data there in the second case.
The level may raid0, linear, raid1, raid10, multipath, or faulty,
or one of their synonyms. All devices must be listed and the
array will be started once complete. It will often be
appropriate to use --assume-clean with levels raid1 or raid10.
