NAS540 "Battery power exhaused" & "initiated Shutdown Sequence" errors not 'critical' category?

ikubuf said:

I do not consider a NAS can write down the log when there is a black out.

The NAS should always stays in a stable and steady power supply environment and network environment.

If it is needed to prevent the unexpected power surge or blackout, I think you need a UPS to make the power supply stable.

I don't think you understood my post, these are in fact errors subsequent to communications with a UPS over USB. "Battery power exhausted" is from the UPS. It's an error the NAS logs as category 'notice' instead of 'critical'. Due to that, there will be no email notification of this VERY SERIOUS state/condition.

Mijzelf said:

Why would a power client alert you that the power server told him to shutdown? It's more the responsibility of the server, don't you think?

And from technical view there are also problems. Initiating a mail delivery while you are told to shutdown will delay that shutdown. Not much, but maybe too much. Further, when the grid power is down, in most cases it will not possible to send an email, because the switch/modem/... will be down.

It's not so much a question of what device's responsibility it SHOULD be to be logging and relaying errors as always it depends on the customer's network. Critical error notification emails are a feature here so the customer is trying to utilize them, that's all. To be specific, this isn't a case with a power server at all; there is no software centrally running like powerchute from APC if that's what you assumed. The UPS doesn't have network access as the NAS does, the UPS messages are from directly connected USB. Regarding the mail send delaying shutdown you mention; it's inconsequential and the UPS should always be giving a warning over USB to the NAS with enough time for the NAS to shutdown gracefully; if email fails to send because site network equipment or the whole block's power is out (with off site ISP equipment) those are separate problems for the customer to address.