HP Integrity NonStop H-Series - Manual (Page 25)

Interfacing With the Open SCSI I/O Process (IOP)
Open SCSI for Fibre Channel Controller Integrator’s Manual for HP Integrity NonStop NS-Series Servers—
3 -9
The CAM Control Block (CCB)
The CAM Control Block (CCB)
When you use the Open SCSI interface, the CCB control field in the WRITEREAD
buffer must correspond exactly to the structure of a CCB for each CAM operation even
if not all the fields of the CCB are needed by a particular operation. One exception to
this rule is that the Open SCSI IOP does not support the Connect ID field of the CCB
(see
Table 3-3 on page 3-12) because this path information is specified when the IOP
is configured through SYSGENR.
CAM Operations
Table 3-1 shows the Common Access Method (CAM) operations, indicates which ones
are supported by the Open SCSI IOP, and also directs you to a table describing the
CCB structure for each supported operation. For a detailed description of these
operations, see the ANSI CAM specification Information Technology - SCSI-2 Common
Access Method Transport and SCSI Interface Module (ANSI X3.221 - 1994).
Table 3-1. CAM Operations (page 1 of 2)
CAM Operation
Code
(in hex)
Description
Supported by
Open SCSI?
00 No Operation (See Table 3-3 on page 3-12.) Yes
01 Execute SCSI I/O (See Table 3-5 on page 3-13.) Yes
02 Get Device Type No
03 Path Inquiry No
04 Release SIM Queue (See Table 3-3 on page 3-12.) Yes
05 Set Async Callback No
06 Set Device Type No
07 Scan SCSI Bus No
08-0F (Reserved) -
10 Abort SCSI Command (See Table 3-4 on page 3-13.) Yes
11 Reset SCSI Bus No
12 Reset SCSI Device (See Table 3-3 on page 3-12.) Yes*
13 Terminate I/O Process No
14-1F (Reserved) -
20 Engine Inquiry No
21 Execute Engine Request No
22-2F (Reserved) -
30-3F Target mode and reserved operations No
40-7F (Reserved) -
80 (Reserved — used by HP) -