.B \-\-homehost=
option to mdadm. There should normally be only one other word on the line.
It should either be a host name, or one of the special words
-.B <system>
+.BR <system>,
+.B <none>
and
.BR <ignore> .
If
.B <system>
is given, then the
.BR gethostname ( 2 )
-systemcall is used to get the host name.
+systemcall is used to get the host name. This is the default.
If
.B <ignore>
.B HOMEHOST
line.
+If
+.B <none>
+is given, then the default of using
+.BR gethostname ( 2 )
+is over-ridden and no homehost name is assumed.
+
When arrays are created, this host name will be stored in the
metadata. When arrays are assembled using auto-assembly, arrays which
do not record the correct homehost name in their metadata will be
of domains of all devices in that array. A spare can be automatically
moved from one array to another if the set of the destination array's
.I domains
-contains all the
+ppcontains all the
.I domains
of the new disk or if both arrays have the same
.IR spare-group .
.B path=
file glob matching anything from
.B /dev/disk/by-path
+.TP
.B type=
either
.B disk
.TP
.B action=
include, re-add, spare, spare-same-slot, or force-spare
+.B auto=
+yes, no, or homehost.
.P
The