I sent the wrong url earlier. This is the correct link about IBM's performance comparison of dasd, fba, scsi on fcp, emulated fba at http://www.vm.ibm.com/perf/reports/zvm/html/520lxd.html
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Gerard Graham Sent: Monday, November 26, 2007 9:57 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Questions about LUN DASD volumes We are now dealing with file in excess of 54 gig since they can not be contained on a single mod54 minidisk we have been writing to sharefile but have found the perforamce to be dreadfull. Does anyone have performance numbers using SCSI devices on native z/VM, compared to sharefile. If the prefomance of SCSI on a lun was superior to that of sharefile it would solve a major problem here. "Romanowski, John (OFT)" <John.Romanowski@ To oft.state.ny.us> IBMVM@LISTSERV.UARK.EDU Sent by: The cc IBM z/VM Operating System Subject <[EMAIL PROTECTED] Re: Questions about LUN DASD ARK.EDU> volumes 11/26/2007 09:47 AM Please respond to The IBM z/VM Operating System <[EMAIL PROTECTED] ARK.EDU> You probably need to find RXSCSIFN SAMPMOD and copy it as RXUSERFN MODULE; SCSIDISC uses it. >From SCSIDISC HELPCMS: SETUP - Located on MAINT 194 or 2C2 disk Find SCSIDISC SAMPEXEC - Copy to SCSIDISC EXEC Find RXSCSIFN SAMPMOD - Copy to RXUSERFN MODULE ATTACH FCP Subchannel (CH ID) to CMS machine This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Mark Pace Sent: Monday, November 26, 2007 9:35 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Questions about LUN DASD volumes On Nov 21, 2007 10:48 AM, Steve Wilkins <[EMAIL PROTECTED]> wrote: SCSIDISC (the SCSI Discovery Tool) is a sample exec which provides target port and LUN information so one can "discover" the LUN topology which hangs off a System z FCP Subchannel. The help file for the tool (SCSIDISC SAMPHELP) indicates that it is "Located on MAINT 194 or 2C2 disk". Regards, Steve. I copied SCSIDISC SAMPEXEC to SCSIDISC EXEC, but when I run it I get - DMSRTL2103E Error in compiled CMS system Rexx file; additional information: 4300 43 SCSIDISC EXEC 587 -- Mark Pace Mainline Information Systems Visit our website at http://www.nyse.com **************************************************** Note: The information contained in this message and any attachment to it is privileged, confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by replying to the message, and please delete it from your system. Thank you. NYSE Group, Inc.
