Between 1:32 AM and 3:46 AM PDT, we experienced increased error rates for new launches that used EBS volumes in a single Availability Zone (apse1-az1) in the AP-SOUTHEAST-1 Region. A small number of volumes in the Availability Zone may have experienced increased EBS I/O latencies during this time, and this issue has also been resolved for the vast majority of customers. We will be directly notifying a small subset of customers who may still be affected by increased EBS I/O latencies via the AWS Health Dashboard.