On Fri, 29 May 2015 19:13:38 +0800 XiaoNi <xni@xxxxxxxxxx> wrote: > And it's really the problem about selinux. The patch works after the > command "setenforce 0". It need the patch you gave. Is it right > to setenforce 0 every time? I'll read the doc about selinux. I know nothing about selinux, and don't really want to. Presumably selinux needs to be told that mdadm, when run from systemd, can access all block devices. If there is something I can add to the system unit file to make this happen I am happy to, but I would need someone to tell me what. Glad you are making progress and learning a lot!! NeilBrown
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