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

The Open SCSI I/O Process (IOP)

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

4-21

SCSI-Status Values

The SCSI status value from the CAM operation Execute SCSI I/O is put into the

appropriate field in the CAM structure and return-d to the application. The application

should check the SCSI-status value even if the file-system error-code value returned is 0

or the FEOK literal (no error).

SCSI-status values are returned by the IOP exactly as they are received from the PMF

CRU or IOMF CRU. Note that the PMF CRU or IOMF CRU firmware defines 0hFF as

a special SCSI-status value indicating that no valid SCSI status is available from the

device.

The SCSI-2 Standard defines bits 7, 6, and 0 of the SCSI-status value to be reserved.

The possible SCSI-status values are defined in the SCSI-2 Standard and listed in

Table 4-9

1B A software error occurred.

40 The SIM queue is frozen.

80 Autosense data is available.

Table 4-9. SCSI-2 Standard Status Values and Their Meanings

Bits of the Status Values

76543210 Meaning

RR00000ReservedGood

RR00001ReservedCheck condition

RR00010ReservedCondition met

RR00100ReservedBusy

RR01000ReservedIntermediate

RR01010ReservedIntermediate condition met

RR01100ReservedReservation conflict

RR10000ReservedCommand terminate

RR10100ReservedQueue fill

All other values Reserved

11111111 PMF CRU or IOMF CRU special

status value

Table 4-8. CAM-Status Values and Their Meanings (page 2 of 2)

CAM-Status

Value

(in hex) Meaning