What is true about crash dump configuration?
A.
The minfree value can be to protect a percentage of available disk space.
B.
The default size of the dump device is configurable.
C.
You can use one ZFS volume for both swap and dump.
D.
You can set quota on a ZFS dump device.
E.
When set on the dump device, the minfree value sets the total size of the dump device to be a percentage
of the total size of the root pool.
Explanation:
See % below.
coredump parameter: -m mink | minm | min%
Create a minfree file in the current savecore directory indicating that savecore should maintain at least the
specified amount of free space in the file system where the savecore directory is located. The min argument
can be one of the following:
k
A positive integer suffixed with the unit k specifying kilobytes.
m
A positive integer suffixed with the unit m specifying megabytes.
%
A % symbol, indicating that the minfree value should be computed as the specified percentage of the total
current size of the file system containing the savecore directory.
The savecore command will consult the minfree file, if present, prior to writing the dump files. If the size of
these files would decrease the amount of free disk space below the minfree threshold, no dump files are written
and an error message is logged. The administrator should immediately clean up the savecore directory to
provide adequate free space, and re-execute the savecore command manually. The administrator can also
specify an alternate directory on the savecore command-line.
Incorrect:
Not C: Separate ZFS volumes must be used for the swap area and dump devices.