Re: FWD: [BK PATCH] SCSI host num allocation improvement

[Arjan van de Ven <arjanv@redhat.com>]

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On Fri, 2004-02-27 at 02:04, Ben Collins wrote:
> On Thu, Feb 26, 2004 at 04:56:01PM -0800, Matthew Dharm wrote:
> > My only concern with something like this is the userspace race problem.
> > i.e the following sequence of events:
> > 
> > (1) User uses cdrecord -scanbus to locate their device (host:bus:dev:lun)
> > (2) HBA is disconnected 
> > (3) New HBA is added
> > (4) User issues command to host:bus:dev:lun, and addresses the wrong device
> > 
> > While the current system doesn't prevent this, it makes it a much more
> > difficult situation to happen.
> 
> Surely the user would have to have known that one device was
> disconnected and another connected. Same thing could already be said for
> the scsi device allocation (sda, sdb, and sg0, sg1, sg2, etc...).

surely everyone is using cdrecord -dev=/dev/scd5  by now and not the 
host:bus:dev crap...

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