Why "mdadm --monitor --program" sometimes only gives 2 command-line arguments to the program?

[Hxsrmeng <hxsrmeng@gmail.com>]

Hi all,

I need to monitor my RAID and if it fails, I'd like to call my-script to
deal with the failure.

I did: 
mdadm --monitor --program my-script --delay 60 /dev/md1

And then, I simulate a failure with
mdadm --manage --set-faulty /dev/md1 /dev/sda2
mdadm /dev/md1 --remove /dev/sda2

I hope the mdadm monitor function can pass all three command-line
arguments to my-script, including the name of the event, the name of the
md device and the name of a related device if relevant.

But my-script doesn't get the third one, which should be /dev/sda2. Is
this not "relevant"?

If I really need to know it's /dev/sda2 that fails, what can I do?

Thanks.


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