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Re: How to hot swap an SCA SCSI disk with NetBSD

On Fri, Oct 25, 2013 at 01:43:28AM -0700, Erik Fair wrote:
> Generally speaking, SCA SCSI drives are hot-swap capable.
> I'm not interested in fiddling with 50-pin or 68-pin with a paused machine - 
> that's (as you note) a recipe for errors and filesystem corruption.
> The key thing in documentation is not just how, but why.
> For example, why "scsictl <dev> detach"? Why not just "stop" and remove?

If you swap in an identical drive, detach/scan is not needed.
If the drive you swap in is different, you need the detach/scan
so that the kenrel is forced to send an INDENTIFY to the drive to get
new parameters.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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