StorageTek SCSI-3 用户手册

FCP and SES Commands

3-4

8946121402

 shows the

FCP_STATUS

 field format.

The reserved bits are set to 0 by the SESD.

FCP_RESID_UNDER

indicates that the

FCP_RESID

field is valid and contains the number of bytes expected to be transferred, but were not
transferred. See

. This bit is not used by SESD.

FCP_RESID_OVER

indicates that the

FCP_RESID

 field is valid and contains the number of bytes that have been truncated because

the

FCP_DL

 was not sufficient. See

. This bit may be set by SESD.

 shows the commands supported by SESD.

The value of the

FCP_LUN

 field in

FCP_CMND

 specifies the logical unit for the request in each

command. The value of

FCP_DL

 field in

FCP_CMND

 specifies whether there is any data

parameter to be transferred to the SESD. The value should be 0 for command 1, 2, 3, 4 and 6.
For command 5, the value may be 0 or the size of a diagnostic page whose page code is in the
range of 80h through 85h.

0

7 .. 0

Reserved

1

7 .. 0

Reserved

2

7 .. 4

Reserved

3

FCP_RESID_UNDER

2

FCP_RESID_OVER

1

FCP_SNS_LEN_VALID

0

FCP_RSP_LEN_VALID

3

7 .. 0

SCSI status byte from the SCSI logical unit (not used)

Inquiry

12h

Receive Diagnostics Results

1Ch

Report LUNs

A0h

Request Sense

03h

Send Diagnostic

1Dh

Test Unit Ready

00h