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Q: We're upgrading a SAN with multiple operating systems (OSes). Should we run a different OS version in each fabric or upgrade both together?
If you upgrade one path and leave the other at the older version, try to upgrade the other path or fabric to the newer version as soon as possible. From a support and management standpoint, you'll be better off updating both.
--Greg Schulz, founder and senior analyst, StorageIO Group
This was first published in July 2008