If you are using an Apple Xserve RAID for video in high data rate formats (such as Uncompressed SD formats or HDTV formats), a Read Prefetch setting of 128 stripes (8 MB) is recommended. When using a Read Prefetch setting of 128 stripes, you may be able to further increase the Xserve RAID's performance by storing audio-only files on a separate drive system (such as a second internal ATA or SATA drive or second Xserve RAID).
If your project uses only compressed SD formats (DV or Offline RT) or stores a significant number of audio-only files to the Xserve RAID, a Read Prefetch setting of 8 stripes (512 KB) is recommended.
For additional information on tuning Xserve RAID settings, see "Xserve RAID 1.5 and Later: Optimizing performance."