Writing Device Drivers

Per-Target scsi-options

An HBA driver might support a per-target scsi-options feature in the following format:

target<n>-scsi-options=<hex value>

In this example, < n> is the target ID. If the per-target scsi-options property is defined, the HBA driver uses that value rather than the per-HBA driver instance scsi-options property. This approach can provide more precise control if, for example, synchronous data transfer needs to be disabled for just one particular target device. The per-target scsi-options property can be defined in the driver.conf(4) file.

The following example shows a per-target scsi-options property definition to disable synchronous data transfer for target device 3: