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Date:      Fri, 22 Jun 2001 12:02:04 -0700 (PDT)
From:      Matthew Jacob <mjacob@feral.com>
To:        Mike Smith <msmith@freebsd.org>
Cc:        <freebsd-scsi@freebsd.org>
Subject:   Re: device arrival/departure/possible state change?
Message-ID:  <20010622115317.Q20923-100000@wonky.feral.com>

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I won't claim to answer helpfully except in generalities:


>Can someone that understands CAM explain what (more or less) one needs to
>do to handle the possible arrival/departure of a device?
>
>It appears that if I send a rescan cdb to rescan an already existing
>device, and the device is still present, something gets really upset.
>
>Specifically, if I know that a particular bus/target may have undergone a
>status change, and I want CAM to work out whether it's still there and
>talking, what do I have to do in the case where a) we have a periph
>attached to the b/t, and b) where there isn't a periph attached to it?



Basically, you have to say a device is gone before you can ask for it to be
found again.

-matt





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