Ccb structures – HP Integrity NonStop H-Series User Manual
Page 27
Interfacing With the Open SCSI I/O Process (IOP)
The CAM Control Block (CCB)
CCB Structures
The descriptions of the various CCB structures in this subsection show that the first
field in each of the CCB structures is labeled Address of this CCB. For this field:
•
The IOP does not use this value while executing the operation.
•
The IOP uses this value only for an Abort SCSI Command operation. When
executing an Abort SCSI Command operation, the application or peripheral driver
should place in the Address of CCB to be acted upon field of the Abort SCSI
Command CCB the same value that it originally placed in the Address of this CCB
field of the CCB for the CAM operation it wants to abort. See
The application or peripheral driver need only ensure that the value in the Address
of this CCB field is unique for all operations it has outstanding in an IOP at any one
time. Then the application or driver can abort this operation if needed.
•
For compatibility with future implementation, the application or peripheral driver
should place into this field the address of the CCB in its own address space.
5
Disable synchronous transfers
1 = Disables
0 = No effect
Yes
Supported only with
the Set I/O
Characteristics
operation.
4
SIM queue priority
1 = Priority insert in SIM queue
0 = Normal insert in SIM queue
Yes
For restrictions, use,
and implementation,
see
3
SIM queue freeze
No
2
SIM queue unfreeze
1 = Unfreeze SIM queue
0 = No effect
Yes
For restrictions, use,
and implementation,
see
1
Engine synchronize
No
0
(Reserved)
-
3
7-0
Denote physical versus virtual
address
No
4
7-0
Describe target mode attributes
No
Table 3-2. Cam-Flag Bits (page 2 of 2)
Flag
Byte
Bits
Description
Supported
by Open
SCSI IOP?
Notes