@InProceedings{barve:round,
  author = {Rakesh Barve and Phillip B. Gibbons and Bruce K. Hillyer and Yossi
  Matias and Elizabeth Shriver and Jeffrey Scott Vitter},
  title = {Round-like Behavior in Multiple Disks on a Bus},
  booktitle = {Proceedings of the Sixth Workshop on Input/Output in Parallel
  and Distributed Systems},
  year = {1999},
  month = {May},
  pages = {1--9},
  publisher = {ACM Press},
  address = {Atlanta, GA},
  URL = {http://vibes.cs.uiuc.edu/IOPADS/Accepted/Shriver.ps},
  keywords = {disk, I/O bus, parallel I/O, pario-bib},
  abstract = {In modern I/O architectures, multiple disk drives are attached to
  each I/O bus. Under I/O-intensive workloads, the disk latency for a request
  can be overlapped with the disk latency and data transfers of requests to
  other disks, potentially resulting in an aggregate I/O throughput at nearly
  bus bandwidth. This paper reports on a performance impairment that results
  from a previously unknown form of convoy behavior in disk I/O, which we call
  rounds. In rounds, independent requests to distinct disks convoy, so that
  each disk services one request before any disk services its next request. We
  analyze log files to describe read performance of multiple Seagate Wren-7
  disks that share a SCSI bus under a heavy workload, demonstrating the rounds
  behavior and quantifying its performance impact.}
}