Re: Retry scsi_mode_sense if UNIT ATTENTION occurs

[Matthew Dharm <mdharm-scsi@one-eyed-alien.net>]

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On Wed, Jul 30, 2003 at 10:09:23AM -0400, Alan Stern wrote:
> On 29 Jul 2003, James Bottomley wrote:
> 
> > On Mon, 2003-07-28 at 10:10, Alan Stern wrote:
> > > Jens:
> > > 
> > > This patch changes the scsi_mode_sense() routine to retry up to a total of 
> > > 3 times if a command fails with a UNIT ATTENTION sense key value.
> > > 
> > > Without this change, sr.c does not properly read the capabilities mode 
> > > page for a just-powered-up cdrom drive -- it gives up upon receiving a 
> > > Device Reset Occurred code.
> > > 
> > > The patch looks lengthy, but most of it just changes the indentation 
> > > level.
> > 
> > Actually, this isn't really the correct place for it.  The problem
> > occurs in sr not sd because sd already does an initial TUR to clear the
> > unit attention.
> > 
> > Before OLS got in the way and I got submerged in writing presentations,
> > I had some patches that Matt Dharm was testing out to add the TUR to the
> > initial sr code.
> > 
> > I'll pick that up (...er, when I get caught back up at work).
> 
> Okay, that ought to take care of it just as well.

I had been wondering what ever happened to that... James, I presume you
still have my last set of data, regarding my CD-RW initialization?

Matt

-- 
Matthew Dharm                              Home: mdharm-usb@one-eyed-alien.net 
Maintainer, Linux USB Mass Storage Driver

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