@InProceedings{gray:stripe,
  author = {Jim Gray and Bob Horst and Mark Walker},
  title = {Parity Striping of Disk Arrays: Low-cost Reliable Storage with
  Acceptable Throughput},
  booktitle = {Proceedings of the 16th VLDB Conference},
  year = {1990},
  pages = {148--159},
  keywords = {disk striping, reliability, pario-bib},
  comment = {Parity striping, a variation of RAID 5, is just a different way of
  mapping blocks to disks. It groups parity blocks into extents, and does not
  stripe the data blocks. A logical disk is mostly contained in one physical
  disk, plus a parity region in another disk. Good for transaction processing
  workloads. Has the low cost/GByte of RAID, the reliability of RAID, without
  the high transfer rate of RAID, but with much better requests/second
  throughput than RAID 5. (But 40\% worse than mirrors.) So it is a compromise
  between RAID and mirrors. BUT, see mourad:raid.}
}