Thank you for your response.

 

Referencing your Using z/VM in a SCSI Environment presentation from WAVV
May 2007 you have the following:  IODEVICE ADDRESS=(5400,128)...  Why
128?  Aside from guest access channel limits per channel what are the
effects, if any, of setting this lower or higher?  This is what I could
not find.

 

Regards,

 

Kevin

 

________________________________

From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Steve Wilkins
Sent: Monday, May 21, 2007 9:54 AM
To: [email protected]
Subject: Re: HCD FCP IODEVICE ADDRESSes

 

The IODEVICE Addresses represent the FCP subchannel devices out to the
SAN. They are not the actual disk volumes. They are portal devices, much
like how OSA subchannel devices are to an IP network. 

The FCP subchannels are all you will configure in HCD or IOCP. The
actual disk volumes are configured either in Linux or VM via the WWPN of
the storage controller port and the LUN name associated with the actual
volume. Please see one of my SCSI presentations on my developer website
for more info: 

http://www.vm.ibm.com/devpages/wilkinss/

I would recommend the WAVV 2007 version.

Regards, Steve.

Steve Wilkins
IBM z/VM Development



Reply via email to