На почту приходит такое:

Dear Sir or Madam,

You have started the ip server re-installation
on 2016-09-06 06:52:34.

The following error occurred:
— Netboot does not work (ESXi5/SmartOS installer doesn't (re)boot)

To repair this error it is necessary to conduct an intervention.
It will be soon done by our technicians. You will be informed
about the beginning and ending of it. Our technician will
restart the operation.

During this intervention, the server will be running in the
mode that make any change in the manager unavailable (reboot, netboot.)

Значит что специалисты в данном ДЦ, идут осматривать сервер.

Прочее, например проверка BIOS:

Dear Customer,

Please note that our technical teams will intervene on your server in 15 minutes in order to carry out the following intervention:

BIOS check

Окончена проверка:

Dear Customer,

The intervention has been completed.

This operation was closed at 2016-09-06 08:12:31

Here are the details of this operation:
BIOS check
Date 2016-09-06 08:09:32, guillaume D made BIOS check:
Please relaunch your installation.

We have a Task: travaux.ovh.net/?do=details&id=20182
and your install failed.

your server are on rescue mode.

Далее сотрудник ДЦ или ставит ОС вручную и скидывает доступы.
Или отвечает, чтобы клиент еще раз запустил установку.