Opinions: root mirror recovery

[Stuart Remphrey - Sun Computer Systems SE - QLD Australia]

Yeah, but did you then try to remove Volume Manager and
reboot to upgrade either Volume Manager or Solaris :-)


` Brett Albertson wrote:
` > 
` > 
` > > Why? Why? ISTR I've replaced root disks in our SSAs by simply
` > > replacing the disk, initialising it, & adding it as a (bootable)
` > > mirror. Why all this prtvtoc stuff?
` > 
` > Imagine this scenario:
` > You install Solaris 2.5.1 on a disk, encapsulate and mirror (Let's call
` > these "root" and "mirror").
` > 
` > The mirror will not have the original partition information, but root will.
` > Let's say that root fails one day, and when you replace it, you resync the
` > mirrors without formatting the disk the original way and encapsulating it.
` > Now the root also is not encapsulated. > 
` > Everything is happy (two mirrored non-encapsulated disks).
` > 
` > Now you want to upgrade to Solaris 2.6.   Ooops.  The first step is to
` > vxunroot, but you can't because neither disk is encapsulated.  This is the
` > crux of the problem.
` > 
` > Brett Albertson				brett.albertson@stratech.com
` > Senior Systems Engineer			voice	(919) 379-8449
` > Strategic Technologies			fax	(919) 379-8100
` > 
` > 
` 
` Is that true?  I remember testing that exact scenario while at a 
` Veritas Volume Manager class last year and being happily surprised that
` I was able to vxunroot despite both disks being non-encapsulated. 
` 
` Allen Todd
` todd@susq.com
` 
` 



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