@InProceedings{cortes:heterogeneity,
  author = {T. Cortes and J. Labarta},
  title = {Extending Heterogeneity to {RAID} level 5},
  booktitle = {Proceedings of the 2001 USENIX Technical Conference},
  year = {2001},
  month = {June},
  pages = {119--132},
  publisher = {USENIX Association},
  address = {Boston},
  URL =
  {http://www.usenix.org/publications/library/proceedings/usenix01/cortes.html},
  keywords = {parallel I/O, RAID, pario-bib},
  abstract = {RAIDs level 5 are one of the most widely used kind of disk array,
  but their usage has some limitations because all the disks in the array have
  to be equal. Nowadays, assuming a homogeneous set of disks to build an array
  is becoming a not very realistic assumption in many environments, especially
  in low-cost clusters of workstations. It is difficult to and a disk with the
  same characteristics as the ones in the array and replacing or adding new
  disks breaks the homogeneity. In this paper, we propose a block- distribution
  algorithm that can be used to build disk arrays from a heterogeneous set of
  disks. We also show that arrays using this algorithm are able to serve many
  more disk requests per second than when blocks are distributed assuming that
  all disks have the lowest common speed, which is the solution currently being
  used.},
  comment = {The web page for the project is
  http://people.ac.upc.es/toni/AdaptRaid.html}
}