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3.11 What's the difference between SCSI and SCSI-2? Are they compatible?

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This item is from the PC Hardware FAQ, by Willie Lim and Ralph Valentino with numerous contributions by others. (v1.25).

3.11 What's the difference between SCSI and SCSI-2? Are they compatible?

The main difference between SCSI and SCSI-2 are some new minor features that the average person will never notice. Both run at a maximum 5M/s. (note: Fast and Wide SCSI-2 will potentially run at faster rates). All versions of SCSI will work together. On power up, the SCSI host adapter and each device (separately) determine the best command set the speed that each is capable of. For more information on this, refer to the comp.periphs.scsi FAQ.

 

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