Fujitsu MAS3367, MAP3367, MAP3147, MAS3735, MAP3735 Error recovery processing procedures 4

Sense Data Error Recovery Methods

		Table 5.4	Error recovery processing procedures (4 of 5)
Recovery			Recovery processing procedure
method
18	1)	Issue the MODE SENSE or MODE SENSE EXTENDED command and confirm the
		values of the disk media data format related parameters (Block descriptor, Page 3:
		Format parameters, Page 4: Drive parameters).
	2)	If the parameter values are correct, issue the FORMAT UNIT command and initialize
		the entire disk media surface. (Note)
	3)	If the parameter values are not correct, issue a MODE SELECT or MODE SELECT
		EXTENDED command and reset the necessary parameters, then reinitialize the entire
		disk media surface by the FORMAT UNIT command. (Note)
	Note In a system where multiple INITs are connected together, an error may have been
		reported due to a MODE SELECT or MODE SELECT EXTENDED command, or a
		FORMAT UNIT command issued by another INIT, so before executing this recovery
		method, it is necessary to confirm the operations of the other INITs.
19	Initialize the entire disk media surface. It is desirable at this time to increase the number of
	spare sectors as much as possible. If this error occurs repeatedly, it is necessary to perform
	alternate block allocation processing through the system (shown in Chapter 6) or reconfirm
	the use conditions of the disk drive, such as the installation environment.
20	1)	Reissue the original command (Retry).
	2)	If it doesn't recover after 10 retries, perform recovery method 13.
21	1)	Issue the MODE SENSE or MODE SENSE EXTENDED command and read the
		"Current" values in the MODE SELECT parameters.
	2)	If the parameters' values are appropriate, reissue the original command.
	Note This error could also be caused by a UNIT ATTENTION condition being generated,
		caused by a programming error of another INIT, so when the values in the parameters
		read in ( are illegal, recovery method 2 should be performed, or the operations of the
		other INITs should be confirmed.
22	Reissue the original command (Retry).
23	1)	If it is necessary to reestablish rotational synchronization, issue the MODE SELECT or
		MODE SELECT EXTENDED command (specify by Page 4, byte 17).
	2)	Reissue the original command (Retry).
24	1)	Issue the READ or READ EXTENDED command and read the data for the block
		where the error occurred.
	2)	Investigate the cause of the data not matching and perform data recovery processing
		from the INIT.
25	Reissue the original command (Retry). It is desirable at this time to confirm the operations
	of the other INITs.

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