QUALITY OF SERVICE BASED ARBITRATIONS OPTIMIZED FOR ENTERPRISE SOLID STATE DRIVES

摘要

A method and apparatus for providing accurate command aging in a data storage device. A host provides multiple doorbell requests for the same command queue and a timestamp is saved for each request. When the storage device fetches the commands associated with the requests, the commands are all given the value of the timestamp associated with the requests and placed into the command queue and the aging algorithm of the storage device ages the commands. In an alternate embodiment, the commands may be assigned timestamps based on statistical values such as an average value, between the first and last doorbell request timestamps.