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Date: Mon, 20 Aug 2007 23:24:07 -0700
From: Darren Pilgrim <freebsd@bitfreak.org>
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To: Artem Kuchin <matrix@itlegion.ru>
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Cc: freebsd-stable@freebsd.org
Subject: Re: A little story of failed raid5 (3ware 8000 series)
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Artem Kuchin wrote:
> That exactly was i was talking about. I don't acess to individual disks
> behind raid unit, so, i cannot doit. I don't know it controller 
> VERIFY command does it right. If it doesm then i shoudl put it into a cron
> job and do it on weekly basis. Also, it would halpfull it i could get access to
> number of left reserved sector for remapping. Any idea about these two for
> 3ware controllers? Also, someone should mention, that while using raid MUST
> do verifies often.

The 3dm2 software (sysutils/3dm port) can dump the SMART data from 
individual disks.  It can also schedule verify and self-test tasks and 
identify individual drives by blinking the activity light for the drive.