Hi all,
we have Problems with using our SCSI-Storage System under z/VM defined
as FCP. The same Storage System works fine for our z/Linux running as a
guest of this VM, so we assume that there are no errors in the
definition of IOCP, HMC, FibreChannel Switch and SCSI Storage System. We
are
So ... when it works on Linux, how is it defined? Using the same
subchannel? (2000) Is NPIV in place? What's with the PPP in the
WWPN in the error report? Is Linux also using this device when you
try to use it as an EDEV?
-- R;
Rick Troth
Velocity Software
We used another subchannel and another LUN for z/Linux - device 2000 was used
for z/VM (edev 9000) with LUN1 and device 2002 was used for z/Linux with LUN0.
We tried it with and without NPIV, it works in both modes for Linux but not for
z/VM.
The PPP in the WWPN can be ignored (changed the WWPN
Have you removed the configuration of the LUN from Linux before you varied
the EDEVice online? z/VM will not be able to open a LUN R/W if it is
already open on another FCP CHPID/WWPN pair. Doesn't matter if it's a
different subchannel, if it's on the same CHPID.
If that's not it, I would
Hello all,
Recently we started noticing on few of our Linux guest that Ethernet frames
were being delayed up to 25 seconds from the time they were sent to the time
the guest received them. The frames are Ethernet LLC keep alive polls (layer 2
poll) that are sent by a Cisco SNA switch router
Just a guess, but have you checked MTU sizes? Are you using a VSWITCH for
the guests or dedicated OSA?
Scott Rohling
On Wed, May 4, 2011 at 5:15 PM, Bhemidhi, Ashwin ashw...@ti.com wrote:
Hello all,
Recently we started noticing on few of our Linux guest that Ethernet frames
were being
Be sure your guest isn't dropping into the eligible list.
That can look like a network problem.
Issue ind q to see if it is there and q srm or consult your performance
monitor.
SRM STORBUFF setting default is too low for Linux workloads on z/VM so
hopefully that has bumped up.
Marcy
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