Datasheet

Command Specifications
4-170 C141-C008
(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 in Table 4.106.
Table 4.106 Self-diagnosis test
Type of Self-diagnosis Test UnotOfl = “0” UnitOfl = “1”
1) Controller Function Test
× ×
2) Disk Drive Seek Test
×
3) Disk Media (CE Space) Write/Read/Data
Comparison Test
×
×: Execution Object
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 sense code/sub-sense
codes 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 4.107.