Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 162

Command Specifications
(1) Self-diagnosis test
When the "SelfTest (self test)" bit is "1," and "Self-Test Code" field is "000" in the CDB, this command
specifies execution of the self-diagnosis test which the IDD is equipped to perform. At this time, the "PF
(page format)" bit and the "Parameter list length" field in the CDB have no meaning and the values
specified there are disregarded. Also, the "DevOfl (device off-line)" bit specifies whether or not
operations which have an influence on the status of logical units other than the logical unit specified in
this command during the self-diagnosis test, but in the IDD, there is only 1 logical unit that exists.
Therefore, the specification in this bit has no meaning and the specified value is disregarded.
The INIT can specify the type of self-diagnosis test to be executed through the "UnitOfl (unit off-line)"
bit. When "1" is specified in the "SelfTest (self test)" bit, the IDD executes a series of self-diagnosis
tests in accordance with the combination with the "UnitOfl (unit off-line)" bit, as shown below.
1) Controller Function Test
2) Disk Drive Seek Test
3) Disk Media (CE Space) Write/Read/Data Comparison Test
When the IDD completes all the specified self-diagnosis tests normally, it reports a GOOD status. On the other
hand, when an error is detected in any of the specified self-diagnosis tests, a CHECK CONDITION status is
reported and information related to the detected error is shown in the sense data. For example, when an error is
detected in the controller function test, the type of error is shown by HARDWARE ERROR [=4] in the sense
key, and the additional sense code/additional sense code qualifier show "Diagnostic failure on component 'nn'
[=40-nn]." (nn is the code in the range X '80' to X 'FF,' which shows the type of error. This code is a Fujitsu
unique definition for the purpose of analysis when there is a failure, and its meaning is not released to the
public. The user should present the value displayed in this sense data as repair information to the Fujitsu
representative.)
Furthermore, error recovery processing when diagnostic tests (seek tests and write/read/data comparison tests)
related to the disk drive are executed are in accordance with the mode set in the MODE SELECT command's
parameters (Page code 1: Read/Write Error Recovery parameter, Page code 21: Additional Error Recovery
parameter), except in the following special cases.
Special cases of MODE SELECT parameters during a self-diagnosis test are as shown below
•
The AWRE, ARRE and TB flags are not applied.
•
The PER and DTE flags are as shown in Table 3.6.
3-100
Type of Self-diagnosis Test UnotOfl = "0" UnitOfl = "1"
× ×
×
×
×: Execution Object
C141-C010