On 2013-4-15 16:39 , tmac wrote:
I completely understand. It is *not* a supported operation.
There are *still* NVRAM handshakes that happen and by changing the head you *WILL* have major problems.
The NVRAM of the old and new systems would never be connected... but apparently I don't understand enough about this functionality, so I'll just study the upgrade guide.
Think about it, your downtime will be minimal. You are only taking down one head at a time.
Err, not really. If any service is unavailable, then our platform is down. Downtime would start when the first head goes down, and end when the last head goes up again. The nature of our system doesn't allow for a partial unavailability. In practice, that means a downtime of hours instead of minutes. If we cannot use takeover, we might as well replace both heads at the same time.