[Op1st-dc-alerts] [mghpcc-alerts] **Potentially Service-Affecting** Electrical Work Starting Wednesday 4/24/24

[mghpcc-alerts]

A reminder that there will be work done on two sets of computer room switchboards in the MGHPCC computer room this week:

Estimated Start: 7:00 AM Wednesday 4/23/24
Estimated End:  5:00 PM Friday 4/25/24

Task 1 -- Work planned for 4/24 and 4/25
Plan to power down the switchboards that feed power to the following areas of the MGHPCC data center to allow electrical work in the computer room.  Detailed schedule in the Description section below.
    R9-PC odd side
    R8-PC odd and even sides
    R7-PC odd and even sides 

Task 2 - Work planned for 4/25 and 4/26
Plan to power down the switchboards that feed power to the following areas of the MGHPCC data center to allow electrical work in the computer room.  Detailed schedule in the Description section below.
   R3-PA odd and even sides
   R4-PA odd and even sides
   R5-PA odd and even sides
   R8-PA odd and even sides

Tenant Impact
----------------
There may be brief periods of time when we will ask everyone to leave the Computer Room for safety (e.g. when a switchboard is being powered up).

Computing, Storage, and Networking equipment in the areas named above should not be affected if it has been properly configured for operation with power cords attached to both the “A” and “B” PDUs in its rack.

Equipment outside the areas named above should not be affected, independent of configuration.

There is elevated risk for the entire Computer Room while the work is being done.

Description
-------------
Task 1 Schedule is expected to be:
* Wed 4/24,  after 7AM: Disable power to the A side bus bars in the areas named above
* Wed 4/24,  after the electrical work is done: Restore A side power.
* Thu  4/25, after 7 AM: Disable power to the B side bus bars in the areas named above.
* Thu  4/25, after the electrical work is done: Restore B side power.

Task 2 Schedule is expected to be:
* Thu  4/25,  after 7AM: Disable power to the A side bus bars in the areas named above
* Thu  4/25,  after the electrical work is done: Restore A side power.
* Fri    4/26, after 7 AM: Disable power to the B side bus bars in the areas named above.
* Fri    4/26, after the electrical work is done: Restore B side power.