Table 5.4

Error recovery processing procedures (4 of 5)

 

 

 

 

Recovery

 

 

Recovery processing procedure

method

 

 

 

 

 

 

 

17

If the PRIORITY RESERVE command issued by another INIT is proper in the system, performthe

 

necessary recovery processing in the system. If not, perform recovery method 2.

 

 

 

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.

 

 

 

 

 

5 - 22

C141-E124-01EN

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Page 281
Image 281
Fujitsu MAN3735, MAN3367, MAN3184 Error recovery processing procedures 4, Recovery Recovery processing procedure Method
Page 280 Page 282

MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

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