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Date: Thu, 01 Sep 2011 13:28:37 +0100
From: Karl Pielorz <kpielorz_lst@tdx.co.uk>
To: freebsd-hackers@freebsd.org
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Subject: Using underlying adX devices as well as ar0?
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Hi,

I posted this question in -Questions about a week ago, and didn't get any 
replies :(

I'm just trying to check - we have a number of 8.2-STABLE amd64 systems 
where the onboard RAID shows up as '/dev/ar0' (which we use for 
filesystems, i.e. /dev/ar0s1d et'al), and the underlying devices for that 
RAID1 array show up as '/dev/ad12', '/dev/ad14'.

Is it OK to run smartmontools / smartd / smartctl against the underlying 
adX devices, whilst ar0 is in use?

I can't see anywhere that seems to indicate it's bad - and I can't seem to 
find anywhere that seems to say it's Ok...

Thanks,

-Karl