Chapter 5 Initiator Mode Pass-through Commands

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Initiator Pass-through Status Block Format

SCSI Status

When a SCSI device completes a command, during the STATUS phase of the SCSI bus it returns a SCSI Status Byte Code to the adapter. The adapter reports that value in this field. The field has these bit meanings:

BITS

7

6

5

4

 

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

RES

RES

 

 

Status Byte Code

 

 

RES

Table 36: Bit-meanings of SCSI Status Field

RES - SCSI reserved.

Status Byte Code - Implementation of these bits is required for all devices that adhere to SCSI specifications. See the table below for information about what they mean.

Further information about the Status Byte Code can be found in the SCSI, SCSI- 2, or SCSI-3 specification.

Status

HEX

7

6

5

4

3

2

1

0

Code*

 

 

 

 

 

 

 

 

 

Good

00H

R

R

0

0

0

0

0

R

 

 

 

 

 

 

 

 

 

 

Check Condition

02H

R

R

0

0

0

0

1

R

 

 

 

 

 

 

 

 

 

 

Condition Met/Good

04H

R

R

0

0

0

1

0

R

 

 

 

 

 

 

 

 

 

 

Busy

08H

R

R

0

0

1

0

0

R

 

 

 

 

 

 

 

 

 

 

Intermediate/Good

10H

R

R

0

1

0

0

0

R

 

 

 

 

 

 

 

 

 

 

Intermediate/Condition

14H

R

R

0

1

0

1

0

R

Met/Good

 

 

 

 

 

 

 

 

 

Reservation Conflict

18H

R

R

0

1

1

0

0

R

 

 

 

 

 

 

 

 

 

 

Queue Full

28H

R

R

1

0

1

0

0

R

 

 

 

 

 

 

 

 

 

 

Table 37: Meaning of Status Byte Code

SCSI Status Field during Unexpected SCSI Phase

In the event that the adapter encounters an unexpected SCSI phase it does two things: posts an error (24H) in the Error field of the Status Block, and reports the phase encountered in the last three bits of the SCSI Status field. The bits correspond to the MSG, C/D, and I/O signals. At the time of an Unexpected SCSI Phase Encountered error, the SCSI Status field has the following bit- meaning:

BITS

7

6

5

4

3

2

1

0

 

 

 

 

 

 

 

 

X

X

X

X

X

M

C

I

Table 38:

I - I/O (Input/Output) Signal from Target

C - C/D (Control/Data) Signal from Target

M - MSG (Message) Signal from Target

X - May be either 0 or 1

21020285 D

User’s Guide

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Ciprico Rimfire 3880 manual Bit-meanings of Scsi Status Field, Meaning of Status Byte Code