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152 Chapter 8
io3000
io3000 classes and subtests
Table 45 io3000 bit definition for Fibre Channel attached SCSI device
specification (words 29-37)
Devices are numbered according to their position in the parameter list. A
device can be specified in any of the device specification locations in user
parameter space. An unused device parameter should be initialized such
that the slot field is 0xf (that is, device specification of 0x0f00).
Therefore, if both device parameters in a given parameter word are
unused, the parameter word would be set to 0x0f000f00.
As an example, to specify a disk on SAGA 0x4, slot 0x2, SCSI
identification 0xa, SCSI lun 0x0, set parameter word 8 to 0x42a00f00.
The lower (right) half of the parameter word has the slot field set to the
0xf. The device number is 0 since it was entered in device 0 parameter
location.
When using cxtest to run io3000, SAGAs are referred to according to
their textual name as stamped in the node sheet metal. Table 46
correlates SAGA names with SAGA numbers:
Location Bit Definition
Word n 0-3 SAGA
Word n 4-7 Slot
Word n 8-31 AL_PA (or D_ID)
Word n+1 0-31 FC lun hi
Word n+2 0-31 FC lun lo