SCSI

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• see also:  FireWire (IEEE-1394)
• In MSDOS.SYS [Options] DoubleBuffer=1 (means conditional DB; this is the recommended setting), DoubleBuffer=0 (means to never have DB; this is dangerous), DoubleBuffer=2 (forced DB)
• SAS = Serial Attached SCSI
  • SAS will be the eventual successor to Parallel SCSI
  • SAS is being positioned in the midmarket—between expensive, high-performance Fibre Channel storage and low-cost, high-capacity SATA (Serial ATA) storage.
  • The current generation of SAS runs at 3G bps full-duplex. The new SATA II specification is 3G bps but runs only half-duplex. The next generation of SAS, due late next year or in early 2007, is expected to run at 6G bps full-duplex. - June 6, 2005
  • Another major benefit of SAS systems is that they are compatible with SATA drives, providing the ability to mix and match SATA and SAS drives in the same enclosure. This will allow IT managers not only to leverage each technology's benefits but also to improve the cost efficiency of storage units since RAID systems will not have to be filled with more expensive SAS drives.