[AusNOG] NextDC Melbourne - Scheduled Power Maintenance -, 15th August

[Chad Kelly]

On 8/10/2017 10:13 AM, ausnog-request at lists.ausnog.net wrote:
>  From the latest update today, It appears that most of the works are being postponed for the time being
>
> Not all devices within racks support 2 feeds and planning is involved with these devices, which is why it is crucial to receive accurate information about any pending outages or upgrades
> to the NextDC DataCentres which affect services.
If these services are mission critical then you really should have duel 
PSU units, so that when one feed gets taken offline the equipment 
automatically switches to the other feed. They won't just disconnect 
both feeds at once because that would be stupid and if the entire DC was 
offline for too much time then that would put the owners in a rather 
awkward situation legally, as after say 8 or 10 hours of downtime it 
wouldn't be good for the owners lets put it that way.
If the single PSU units are a part of a customers co-located equipment 
then really your terms of service agreement should exclude liability 
under your maintenance clauses.
I don't understand why anyone would be using single PSU equipment in a 
DC environment now a days when you can buy refurbished servers that come 
with two PSU as standard even when you buy them without raid.
Also for anything that is really really mission critical you should have 
it hosted in multiple datacentres anyway so if something stupid does 
happen that you can't control you at least still have services online as 
the load balanced services would just switch.
Regards Chad.

-- 
Chad Kelly
Manager
CPK Web Services
Phone 03 5273 0246
Web www.cpkws.com.au