We experienced 'Constructing RAID volume...' takes too much time on some AMIs, this is because setup script stuck at 'yum -y install mdadm xfsprogs'. We don't have to install these packages on AMI startup time, we should preinstall them on AMI creating time. Signed-off-by: Takuya ASADA <syuu@scylladb.com> Message-Id: <1502192796-21040-1-git-send-email-syuu@scylladb.com>