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FS#2357 — FS#6325 —Intervention on by-pass of the UPS 1 (rack 02XYY)

Attached to Project— Datacenters
Incident
Roubaix 1
CLOSED
100%
The operation will include a software interruption of all servers in Room 2 of the datacenter of Roubaix 1 (racks 02XXX). Each customer will receive an email for information.
The operation is scheduled on the night of Sunday the 5th to Monday, February the 6th, 2012 from 00h. The interruption time should be about 1 hour.


MORE:
The UPS has a flashover (bypass) for supplying the load in case of failure or maintenance of the UPS.
On the UPS1, an isolation transformer is integrated to by-pass to reduce harmonics when the UPS is bypassed.
Due to maintenance operations, we found that this transformer was potentially defective , so we will remove it (this equipment is not really useful for electrical installation). We have no ability to perform this maintenance 'in charge', and we plan for the interruption of the servers.

Date:  Monday, 06 February 2012, 17:08PM
Reason for closing:  Done
Comment by OVH - Monday, 06 February 2012, 07:52AM

The worktasks began.

The first servers stop according to the schedule we have set up.


Comment by OVH - Monday, 06 February 2012, 07:53AM

The room is electrically disconnected. The electricians are working on the bypass.
Technicians in the datacentre are finalizing the operations to ensure the fastest possible restart.


Comment by OVH - Monday, 06 February 2012, 07:55AM

We will return power to the room.


Comment by OVH - Monday, 06 February 2012, 07:56AM

90% of servers were restarted without problem (this is the typical ratio).
Our teams, reinforced for the occasion,intervened on the remaining servers (a lot of fsck).