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Solaris (Intel Platform Edition) - Device Driver Writer's Orientation

 

Page 54 of 66


SCSI Drivers: SCSA (cont)

SCSI Target Drivers:
  • Know how to control the particular target device on the SCSI bus using SCSI commands
  • Are independent of the HBA being used
  • Are not concerned with low-level SCSI bus protocol
  • Construct target device commands and pass them to an HBA driver for transport to the target device
SCSI HBA Drivers:
  • Know how to transport the target driver's SCSI commands through the HBA and across the SCSI bus to the target device
  • Can transport SCSI commands on behalf of different target drivers
  • Are not concerned with the programming of the specific target device

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