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4.4 Maintenance, Diagnostic Commands
C141-C013 247
Table 4.47 Self-diagnosis test
Type of Self-diagnosis Test UnotOfl = "0" UnitOfl = "1"
1) Controller Function Test
× ×
2) Disk Drive Seek Test
×
3) Disk Media Write/Read/Data Comparison Test
×
×: Execution Object
When the HDD 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 4.48.