On Thu, Nov 01, 2007 at 03:21:01PM -0400, Romeo Theriault wrote: > Hello, I've read a few places on the internet that a fairly easy and > straight forward way to safetly break your rootdisk mirroring for purposes > of patching the Solaris OS, is to turn off your machine and remove your > root-mirror drive from the machine. Boot off of your rootdisk, do your > patching and if everything goes ok, put your rootmirror drive back in the > machine, vxattach it back into the mirror. If the patching fails for some > reason power down the machine, remove the rootdisk drive put in the > rootmirror drive and boot then put the rootdisk drive and have it resync off > of the rootmirror disk. > > Is this a supported way of rolling back from patching?
Hmm. Supported by who? I'd have to guess that Veritas/Symantec "supports" what VxVM does when you lose a disk (which is what it looks like if you pull a disk while the power is off). > Is there any > documentation that thoroughly describes the process? No one document that I'm aware of. The fact that you happen to be patching or otherwise modifying the data on the machine during the period is irrelevant to VxVM. It's just managing a machine that has suddenly lost a disk. > It certainly seems much easier than the documenation I've read from Symantec > that explains how to remove the rootmirror entirely from a software level. Yes, because you're not removing the rootmirror. It remains in the configuration. In fact, you're explictly causing a "split-brain" condition in some sense, because you have two copies of the DG database that are inconsistent. But because you only have one disk in the machine at a time (until you're ready to sync up), this isn't noticed. This is very difficult to accomplish with some hardware due to the difficulty of removing or powering off a single disk. -- Darren Dunham [EMAIL PROTECTED] Senior Technical Consultant TAOS http://www.taos.com/ Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. > _______________________________________________ Veritas-vx maillist - Veritas-vx@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx
