When moving from our old Multiprise 2000 to our new z9, we had to do two DASD migrations, from the Multiprise 2000 internal disk to loaner DASD that could connect to both the Multiprise and z9, then from the loaner DASD to our new production DASD (that couldn't attach to the Multiprise). For moving CMS users, we used VM:Secure, moving users while they were logged off, finishing up a few server virtual machines during IPLs. For our VSE guests, we tested the new DASD to see how many concurrent DDRs we could run at one time without degrading run time, then set up an EXEC to fire off multiple DDRs and ran this at IPL, typically delaying startup for the VSEs by about an hour each time (the maximum we could get away with). It took us a few weeks with weekly IPLs and some weekend VSE shutdowns to get everything done.
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Smith, Ann (ISD, IT) Sent: June 20, 2008 10:40 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. ************************************************************************ * The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review retransmission dissemination or other use of or taking any action in reliance upon this information by persons or entities other than the intended recipient or delegate is strictly prohibited. If you received this in error please contact the sender and delete the material from any computer. The integrity and security of this message cannot be guaranteed on the Internet. The sender accepts no liability for the content of this e-mail or for the consequences of any actions taken on the basis of information provided. The recipient should check this e-mail and any attachments for the presence of viruses. The sender accepts no liability for any damage caused by any virus transmitted by this e-mail. This disclaimer is property of the TTC and must not be altered or circumvented in any manner.
