Two types of device driver provide support for all SSA subsystems:
For subsytems that use Micro Channel Enhanced SSA Multi-Initiator/RAID EL Adapters or PCI SSA Multi-Initiator/RAID EL Adapters, the Target-Mode SSA (TMSSA) device driver is also available. This device driver provides support for communications from using system to using system. For information about SSA Target Mode and the TMSSA device driver, see SSA Target Mode.
The SSA adapter device driver provides a consistent interface to all SSA head device drivers, of which the SSA disk device driver is an example.
The SSA adapter device driver sends commands for SSA devices to the adapter that is related to those devices. When the SSA adapter device driver detects that the commands have completed, it informs the originator of the command.
The SSA disk device driver provides support for the SSA disk drives that are connected to an SSA adapter. That support consists of:
To communicate with the SSA adapter device driver, the SSA head device driver:
Note:When fp_close is called, SSA_Ipn_Directive cannot be called.
The SSA adapter device driver and the SSA disk device driver can both make entries in the kernel trace buffer. The hook ID for the SSA adapter device driver is 45A. The hook ID for the SSA disk device driver is 45B. For information on how to use the kernel trace feature, refer to the trace command for the kernel debug program. With the PCI SSA Multi-Initiator/RAID EL Adapter and Micro Channel Enhanced SSA Multi-Initiator/RAID EL Adapter, the Target-Mode SSA device driver can make entries in the kernel trace buffer; its hook ID is xxx.
The SSA Adapter Device Driver, ssadisk SSA Disk Device Driver.
Trace Command for the Kernel Debug Program.