Dear users of stat100{4,6,7},

we are planning on upgrading stat1004 to Debian Buster this Thursday
(2020-09-17) after 12:00 CEST (10:00 UTC). We will reinstall the machine,
preserving user data (home directories, /srv), but to be on the safe side,
we will backup that data. After the reinstall and a few tests, we will send
an all-clear to this list.

A few things of note:

- It would be greatly appreciated if you cleaned out unneeded data before the
  backup time mentioned above, thus speeding up backup (and restore if we need
- Any changes made to the file system contents after the time mentioned above
  may be lost.
- Around the time of the backup, both cron and systemd timers will be
  disabled, and still-running process may be ungracefully terminated.

If this process works well, the remaining stat100x machines in need of update
(6, 7) will be processed in a similar manner.

As always, if there are questions, do not hesitate to contact us.


Tobias Klausmann, SRE, Wikimedia Foundation