detailed information about mdadm output
I'm using mdadm for managing raid arrays in one of our debian server. There you can look for detailed raid informations with mdadm --detail <raidarray>. When you look at the output, there are 2 things where I don't know what they mean exactly. So, I thought that maybe anyone in this forum can help me with them.
In the server I have 2 raid1 arrays with 2 discs active which I use as root and as swap.
In the output of one array I get the Output "Preferred Minor : 2" and in the other "Preferred Minor : 1". So what is "Preferred Minor" in details?
And the 2nd question I have is the detailed difference between state "clean" and "active". I think both states mean no problem. Is this correct? Does "Clean" mean that there is actualy no disc activity and the array is stateful? And "Active" that the array is OK but there is disc actiity? The state is only "Active". Not "Active, degraded".
I hope that anyone can give me an answer to my questions.
PS: Sorry for my bad english. ;-)