Open SCSI Integrator's Manual for NonStop S-Series Servers

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The Open SCSI I/O Process (IOP)

Open SCSI Integrator’s Manual for NonStop Servers—422988-002

4-13

The CAM Control Block (CCB)

CCB Structure for Abort SCSI Command

The CCB structure shown in Table 4-4

is used for only one of the supported CAM

operations, Abort SCSI Command (see also Table 4-1 on page 4-9).

CCB Structure for Execute SCSI I/O

The CCB structure shown in Table 4-5

is used for only one of the supported CAM

operations, Execute SCSI I/O (see also Table 4-1 on page 4-9).

Table 4-4. CCB Structure for Abort SCSI Command

Size of Field

(in bytes) Description

Supported by

Open SCSI IOP?

4 Address of this CCB: the 32-bit address of this

field

Yes

2 CCB length: length in bytes of this CCB structure;

must be 20 for Abort SCSI Command CCB

Yes

1 CAM operation code (see Table 4-1 on page 4-9) Yes

1 CAM status (see Table 4-8 on page 4-20) Yes

Connect ID, which consists of the following fields:

1(Reserved) -

1Path ID No

1Target ID No

1 LUN No

4CAM flags (see Table 4-2 on page 4-10) Yes

4 Address of CCB to be acted upon Yes

Table 4-5. CCB Structure for Execute SCSI I/O (page 1 of 2)