DDF raid6 layouts are subtly different from the standard 'md' layouts.
From 2.6.30 the kernel knows about these.
Teach mdadm about them, and also allow 'ddf' to set an appropriate default.
Signed-off-by: NeilBrown <neilb@suse.de>
Metadata formats like imsm work in concert with platform firmware and
hardware, so provide a way for mdadm to display this info to the user.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
For use in distro shutdown scripts with a RAID root file system.
Returns immediately if the array is 'readonly', or not an externally
managed array. It is up to the distro's scripts to make sure no new
writes hit the device after this returns 'true'.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
From: Doug Ledford <dledford@redhat.com>
This one fixes a bug where once manage mode is set, the -a short option
is no longer parsed correctly (true of grow mode as well). This happens
because when you switch the short opts to the bitmap_auto version, it
specifies that the argument must follow a, yet the loop expects to get
an undecorated option and parse it as the disk dev instead of trying to
parse optarg. So, create a new short opt array that is used for manage
and grow that doesn't list a as having an argument.
udev likes to get information about a device as key=value pairs so it
can create disk/by-id links etc. So add --export flag which causes
the output of --detail to easily parsable.
From: Kay Sievers <kay.sievers@novell.com>
This can be used to bootstrape homehost tagging.
If no arrays are found that are tagged, we look for any array
and tag it.
Signed-off-by: Neil Brown <neilb@suse.de>
Use to avoid starting arrays if there are
fewer devices available than last time the array was started.
This is only needed with --scan, as with --scan, that behaviour
is the default.
Signed-off-by: Neil Brown <neilb@suse.de>
