US Patent 7590770 Device-independent control of storage hardware using SCSI enclosure services

A SES API is disclosed as an interface between SES protocol code and non-SCSI storage enclosure hardware to abstract the SES protocol code from the control of the hardware. To control the hardware, SES commands are sent to the SES protocol code. The SES protocol code is responsive to the SES commands, but has no knowledge of the hardware. The SES protocol code converts the SES command to a series of function calls. When the SES API receives the function calls, it executes the corresponding functions. The SES API includes a customer-tailored interface library of functions. The library allows the end user to provide the hardware interface routines necessary for SES to control the hardware. The functions are written as templates, separate from the SES protocol code, so that end users can modify the functions to control the hardware without having to modify or understand the SES protocol code.