If a device has to spin up, it can either NAK during the data stage while
the devices comes to speed, or it can NAK the CBW while it's spinning up.
The Bulk-only spec doesn't say when the delay should be done... and some
devices do it in the CBW and others during the data stage. Since timeouts
are done spearately for the CBW and for the data stage, it's hard to get
good values, since allowing enough time for spinup during each means a
possible 32 second delay -- which makes the SCSI midlayers a bit upset.
Matt Dharm
On Fri, 5 May 2000, Pat LaVarre wrote:
> > ... Spin up times vary greatly by device, and the spec is unclear
> > as to if the delay should be seen in the command stage or data stage.
> > ... one camp ... other devices go the other way. It's made for some
> > interesting attempts to choose good timeout values.
>
> Could someone volunteer to elaborate?
>
> What public spec addresses this in any way whatsoever?
>
> How is any delay ever seen in the BBB command stage? Do there really exist devices
>that transmit a CSW but all the same then NAK the immediately following CBW?
>
>
> x4402 Pat LaVarre of iOmega [EMAIL PROTECTED] http://members.aol.com/ppaatt/
>
>
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YOU SEE!!?? It's like being born with only one nipple!
-- Erwin
User Friendly, 10/19/1998
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