[wplug] Re: SCSI compatibility -- SCSI disconnect,
LVD v. SE signaling, etc...
DK
curlynoodle at gmail.com
Sat Jun 30 21:26:33 EDT 2007
Thanks for all the great SCSI info gentlemen.
Dave
On 6/29/07, Michael Skowvron <michaels at penguincentral.org> wrote:
> > 1. SCSI-2 protocol and device disconnect/negotiation
>
> Perhaps you can confirm what I was told about arbitration. I was told by
> someone that on a parallel SCSI channel, the devices are "serviced" (for
> lack of a better word right now) in SCSI ID order. In other words, if
> several disks on the chain are all ready to transfer data to the host,
> the device with the lowest SCSI ID will allways win or communicate
> first. On a heavily utilized SCSI bus, this can have the effect of the
> lower ID devices gaining somewhat of a priority advantage of the higher
> ID devices.
>
> Michael
>
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