Josh26 wrote:
Honestly at this scale, you don't want automatic integration. When you've got 2-3 servers and a managed UPS, it's great to see an automated shutdown.
But with a 7200, and the presumably high quality datacentre it should be put in, the risk should be higher of running more issues with a problematic automated shutdown process, than with an unclean shutdown.
If you cleanly shutdown a SAN, and one server is still on its way shutting down, you'll just caused a major incident for that server. If something goes wrong with your software and the power's fine but the shutdown gets sent, you're down.
What if the UPS fails, but switches onto automated bypass which provides perfectly good power? I've seen this happen more than once - you don't want that to trigger an automated shutdown.
What if on power rail fails but the other is fine? Same scenario.
But with a 7200, and the presumably high quality datacentre it should be put in, the risk should be higher of running more issues with a problematic automated shutdown process, than with an unclean shutdown.
If you cleanly shutdown a SAN, and one server is still on its way shutting down, you'll just caused a major incident for that server. If something goes wrong with your software and the power's fine but the shutdown gets sent, you're down.
What if the UPS fails, but switches onto automated bypass which provides perfectly good power? I've seen this happen more than once - you don't want that to trigger an automated shutdown.
What if on power rail fails but the other is fine? Same scenario.
Good points. Just go ahead, buy a diesel generator (they are surprisingly inexpensive), and forget about graceful shutdown
It has been a long time since I configured UPS shutdown routines but now that I think about it, I never had a serious corruption issue due to power failure but I did had some unwanted shutdowns due to false alarms etc. Better live without it.