You may not have VM, but your DR service probably does. Any chance you can get them to run it in the LPAR you will use for Linux? If so, then you can work with their staff to define a VM guest with dasd addressess like back 'ome, and boot Linux without changes. We have found that our contract says one thing, but since we are on good terms with them, they don't unreasonably hold us to it. E.G. We are contracted for eight 3480 tape drives, since there are about sixteen in the room, plus some newer models, we get to use them all.
> -----Original Message----- > From: James Melin [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, February 06, 2003 9:36 AM > To: [EMAIL PROTECTED] > Subject: Disaster Recovery scenario - comments, suggestions, real > world advice > > We are having a Disaster Recovery exercise in April. My boss thinks it > would be nifty if we could recover the 2.4 Linux system I just got > installed (with much help from you SMOONOL's - Secret Masters Of Obscure > kNowledge Of Linux). > > The disaster recovery exercise will not allow us to have an organization > employee with access to the HMC on which we will be operating, we would > have to rely on someone at the vendor site to do any HMC interactions for > us. We will be doing this in LPAR mode - We do not have VM, and with a 25% > budget cut across IT, we won't be getting it any time soon. > > Secondly, the DR exercise will have us restoring OS/390 volumes to > different device numbers than what exist here. We have procedures in place > for that and it all works. I will have to do the same with the CDL backups > of the Linux volumes > > since /proc/dasd/devices in any backup will reflect the old device > mapping, > I assume I will simply fall flat on my face if I try to IPL from the CDL > copies. > > So what is necessary after a CDL restore is done to new DASD in order to > IPL the Linux system? Is there an initrd that must be booted from the HMC > so that adjustments to the image may be done? Is there some OTHER way to > alter/access the CDL volume structure from OS/390 to make the changes > necessary to IPL? If we have to have the vendor operator performing initrd > boots and entering in the initial ramdisk information so that I could > telnet into the system and fix things that way. > > Note, we will ONLY have 3270 dumb terminals at this site, from what I > understand. Contract has not previously included network attached desktop > PC's from which I can run a decent VT100 capable telnet session, or > TN3270. That alone may kill this. > > So now that I've outlined this fairly hopeless situation.... is there > anything that can be done to allow us to accomplish a disaster recovery > test of Linux in the described environment?
