Daniel,
SCSIDISC retrieves all registered WWPNs from the switch connected to the
selected FCP subchannel(s). If it only reports the one you had attached,
it doesn't sound like the switch zones are setup properly to let the LPAR
see the DASD subsystems. Has the SAN admin registered the physical WWPN
of the card with the switch zone, or the NPIV WWPNs (displayed on Q FCP
output)? The latter is necessary in NPIV environment.
Regards,
Eric
Eric Farman
z/VM I/O Development
IBM Endicott, NY
From:
Daniel Tate
To:
IBMVM@LISTSERV.UARK.EDU
Date:
04/15/2010 10:50 AM
Subject:
Re: z/VM not seeing storage from SAN
Sent by:
The IBM z/VM Operating System
scsidisc only reports those i've attached. That particular output was
from a different device (i.e. 5001).. my terminology is a little off.
Our SAN admin swears it's configured correctly on the switch.
On Thu, Apr 15, 2010 at 9:38 AM, Eric R Farman wrote:
Hi Daniel,
The WWPN listed in your Q FCP outputs and that from the SCSIDISC tool are
similar enough that I suspect they are different subchannels on the same
FCP card, and not of your target DASD subsystem. Are there other WWPNs
listed in the SCSIDISC output beyond what you have sent? If so, what does
SCSIDISC see with them? If not, has the switch been told about the NPIV
WWPNs that the VM LPAR will be using (that is, those listed in Q FCP)?
What specific messages do you get when varying on the EDEV?
One other thing... the FCP subchannel (5000 in your example below)
shouldn't be attached to a particular user if it is going to be used as
part of an EDEV. It should be free so that VM can attach it to the SYSTEM
itself at the time the EDEV is varied online. (The FCP can be used for
multiple paths/LUNs at once, so in reality the FCP should be either free
or attached to SYSTEM.) The ATTACH 5000 TO * command would be used for a
guest to use, such as for SCSIDISC or Linux itself configuring SCSI.
Regards,
Eric
Eric Farman
z/VM I/O Development
IBM Endicott, NY
From:
Daniel Tate
To:
IBMVM@LISTSERV.UARK.EDU
Date:
04/14/2010 02:40 PM
Subject:
z/VM not seeing storage from SAN
Sent by:
The IBM z/VM Operating System
Disclaimer: I am a UNIX admin, working with z/VM for the first time.
I only know basic commands and concepts, but really need to get this
working.
Our san is connected, and other LPARs can see the storage. the CHPID
is online. I can attach the storage (ATTACH 5000 to *) and SET EDEV
blahblahbah.. but when i try to vary on the storage,i get a NO PATH TO
DEVICE error.
Anyone have any ideas?
SCSIDISC Reports:
WARNING::WWPN C05076FAE3000408 Could Not be Opened
WARNING::WWPN C05076FAE3000408 ignored
Here’s the output from q fcp:
q fcp
07:05:04 FCP 5000 ATTACHED TO MAINT5000 CHPID 46
07:05:04 WWPN C05076FAE3000400
q v fcp
08:27:31 FCP 5000 ON FCP 5000 CHPID 46 SUBCHANNEL = 011D
08:27:31 5000 DEVTYPE FCP CHPID 46 FCP
08:27:31 5000 QDIO-ELIGIBLE QIOASSIST-ELIGIBLE
08:27:31 WWPN C05076FAE3000400
Ready; T=0.01/0.01 08:27:31
