Do you mean not on VM? I'd assume z/OS supports it since the SDM's are ok.
I did find a nasty looking Interface Control Check msg, so that's an avenue
to pursue.

MA

On Tue, Nov 25, 2008 at 12:26 PM, Alan Altmark <[EMAIL PROTECTED]>wrote:

> On Tuesday, 11/25/2008 at 11:43 EST, Mary Anne Matyaz
> <[EMAIL PROTECTED]> wrote:
> > Hello all. While we're on the subject of DASD today, I finally got my
> chpids to
> > access the production dasd from the
> > D/R machine z/VM 5.4 lpar. I tried to accept a big range, and maint hung
> up. I
> > waited a half hour, then tried to
> > force him. No joy. So I removed the dasd from the not accepted list, and
> IPL'd.
> > The IPL took 5 minutes to get to the
> > SALIPL Screen. When it came up, I tried to vary on a range of about 15
> devices.
> > Again, hung up maint. Wait 1/2 hour,
> > IPL. Tried to vary on one device, and it worked! So I tried the next
> one, hung
> > up my ID, and it's still sitting there 45 minutes
> > later.
> > Any ideas? Some sort of MIH setting? The SDMPlex is fine...not a whole
> lot of
> > activity on these devices. I have 2 chpids
> > online. I understand it's going to be slower, but this just won't work.
> :)
>
> I have always understood that channel extenders for DASD are not supported
> because of the latency.  You should probably check the dasd control unit
> to see if it's logging any errors on its own.  Is EREP showing anything?
>
> Alan Altmark
> z/VM Development
> IBM Endicott
>

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