Hi Ann, You definitely want your Linux guests DOWN for this important move. Likewise, log off all virtual machines other than the one(s) doing the DDR'ing. I don't know how many spindles you have, but DDR disk to disk is pretty fast, and if you fire up a dozen or more slaves to do the work you'll be done in no time. -Mike
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Smith, Ann (ISD, IT) Sent: Friday, June 20, 2008 10:40 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Moving zVM systems( with linux guests) to new dasd We are going to be moving our zVM systems to new IBM dasd (DS8300). In past dasd migrations we had used REXX execs and some assembler code to basically DDR all volumes from the old dasd to the new. We would shutdown the system and run the DDR's from one of the other VM systems. The zOS dasd is being moved as well and TDMF is going to be used. Apparently TDMF can copy the dasd while the systems are up. But we were told there is no TDMF for VM. For VM systems with linux guests it will take a while to do DDR's. We may do linux guests individually (shorter outage windows). My question is about best practices for dasd migration for zVM systems with linux guests. My gut feeling is you still would want the linux guest down while dasd is copied. We mainly have ext3 filesystems. Is there any TDMF in the works for zVM (or some other method of copying while systems are up)? Do folks define full pack minidisks? Or is it still best to shutdown the linux servers? Looking for suggestions from others who may have gone through this process. Ann Smith Mainframe Systems Support -zVM and zLinux Support Integrated Technology Delivery IBM Global Service Integrated Operations At The Hartford Work phone: 860-547-6110 Pager: 800-204-6367 Email: <mailto:[EMAIL PROTECTED]> mailto:[EMAIL PROTECTED] ************************************************************************ * This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential and/or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this communication and destroy all copies. ************************************************************************ *
