We did our Disaster Recovery test last week and recovered 3 production linux instances and a test instance in addition to the standard zVM and OS/390 instances. We do all of the full-volume DASD backups under OS/390 using DFDSS. The DR vendor's floor system is used to restore all the DASD and then we IPL zVM and run our OS/390 and linuxes almost as if they were back home. Minor changes to directory entries are done for the variable devices like printers/telcom/graf/claw etc. zVM does an excellent job of keeping OS/390 and Linux from needing to know anything about the REAL device addresses.
/Thomas Kern /301-903-2211 > -----Original Message----- > From: James Melin [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 04, 2003 16:12 > To: [EMAIL PROTECTED] > Subject: Re: CDL backup and copying the IPL record > > > Oy. > > Well then, how would you recommend this be done? I have no > decent facility > at disaster recovery to IPL a recovery CD and mount the disk images to > that. The vendor is reluctant to load anything from CD at the > HMC. I'm > basically trying to take the file system images on the CDL > volumes and back > them up using OS/390 tools and then restore them with the > same tools, to > diff volumes, map those volumes to the same device addresses > as they were > on the original system in VM and IPL. > > > > > |---------+----------------------------> > | | "Post, Mark K" | > | | <[EMAIL PROTECTED]| > | | m> | > | | Sent by: Linux on| > | | 390 Port | > | | <[EMAIL PROTECTED]| > | | IST.EDU> | > | | | > | | | > | | 09/04/2003 02:37 | > | | PM | > | | Please respond to| > | | Linux on 390 Port| > | | | > |---------+----------------------------> > > >------------------------------------------------------------- > -----------------------------------------------------------------| > | > | > | To: [EMAIL PROTECTED] > | > | cc: > | > | Subject: Re: CDL backup and copying the IPL record > | > > >------------------------------------------------------------- > -----------------------------------------------------------------| > > > > > Jim, > > I don't think those two statements are either necessarily correct, or > incorrect. I would say that the "trick" is that the first > cylinder to be > dumped to tape (and restored to disk at real cylinder 0) > needs to be what > the Linux/390 system thinks is cylinder 0. That's where the > IPL record > information is going to be. So, depending on how the > minidisk is set up > (if > using z/VM), and how you dump it, etc., etc., etc. > > > Mark Post > > -----Original Message----- > From: James Melin [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 04, 2003 1:28 PM > To: [EMAIL PROTECTED] > Subject: CDL backup and copying the IPL record > > > If I understand things correctly, a DD dump of a linux volume > will not copy > the IPL record, whereas a disk copy of the CDL image on the > OS/390 side, > will? Is that a true statement? > Would this allow you to restore say a slightly pregnant mod-9 > device (our > dasd person gave me an approximately correct size mod-9 and > our disaster > recovery vendor uses real mod-9 geometry 1014 tracks too > small) to a mod > 27, and be able to read an IPL record off that device? >
