On Monday December 21st starting at 11AM, our engineering team will be replacing several hard drives in our storage cluster. To ensure your instances remain running and available, we will pause our software-router management software, temporarily restricting adding or removing floating IPs to instances. You may also see a short period of disk IO pauses while the storage cluster rebalances itself with the new hardware.
For more information, be sure to follow the updates on the DreamHost Status blog or join us on IRC! The team will be in #DreamCompute on freenode.
Update: The team completed the maintenance without major issues!