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Sense Data and Error Recovery Methods
374 C141-C013
• Since the command stack feature exists (see Section 2.4), even if the HDD
accepts a command normally, if a command issued by another INIT is being
executed, or if there are other commands in the stack, execution of the
command is caused to wait until all the other commands have been processed.
The execution wait time is dependent upon the type of command issued by
the other INITs and the contents of its specifications.
• If the HDD has executed error recovery processing (retried) for an error that
occurred on the SAS I/F or in the disk drive, command completion time will
be longer than normal.
6.2.2 Sense data analysis and error recovery methods
The INIT can judge the procedure for error recovery by analyzing the contents of
the sense data. Table 6.5 the classifications of error information displayed in the
sense data are shown and in Table 6.6, the procedures for error recovery
recommended for the INIT to execute are shown. The error recovery procedure
which can be executed by the INIT will differ depending on the system's
condition, so the optimum processing procedure should be selected for the user
system with reference to the following descriptions.