An I/O scheduler can manage and schedule write requests that are sent to a storage device in order to prevent the write requests from dominating a storage buffer of the storage device. The I/O scheduler can monitor the number of I/O requests in the storage buffer and maintain a balance between write requests and read requests in the storage buffer. The I/O scheduler monitor the latency of the storage device in processing write requests and manage the write requests sent to the storage device based on the latency. The I/O scheduler can utilize one or more write thresholds. The write thresholds can define thresholds of the number of write requests in the storage buffer and thresholds for the latency of the storage device in processing write requests. The write threshold can represent acceptable levels of write request in the storage buffer and acceptable latency for write requests.