[Info-vax] Unpleasant Disk Shadowing Surprise

[Paul Sture]

On Wed, 12 Oct 2011 12:36:19 -0700 (PDT)
Kenneth Fairfield <ken.fairfield at gmail.com> wrote:

> On Wednesday, October 12, 2011 12:19:24 PM UTC-7, MG wrote:
> > On 11-10-2011 22:16, Kenneth Fairfield wrote:
> > > I was more interested in what SHOW DEVICE DK shows
> > > for the members of the shadow set in question.  Errors
> > > on the PK device are not terribly interesting most of
> > > the time (they tend to come in ones and twos at boot
> > > time, etc.).
> > 
> > That's something I've noticed as well.  One dual channel Ultra320
> > SCSI controller usually gives three errors, during boot time.  But,
> > after that it simply works flawlessly without any errors whatsoever.
> > 
> > What do you think it might be, most of the time, in your experience?
> [...]
> 
> No idea.  Perhaps Rob Brooks has one.  
> 
> Having come from HSJ/CI-attached storage where no errors
> like these get logged (on mount or boot), and having 
> similar experience as yours, I just took it to be 
> characteristic of FC-attached disks.  Whether it's the 
> device drivers, some sort of polling of the devices, or
> whatever, they just seem to work that way.
> 

I don't know either but could it be something thrown up by an
initialization probe?