mdadm --grow --help shows
--raid-disks= -n : Change the number of active devices in an array.
: array.
but the manpage uses:
--raid-devices
The latter should be preferred?
Also, a --grow fails without a spare or --backup-file, however
--backup-file is only in the manpage, not in the --help. That's pretty
minor but useful.
--
Jon
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