Fujitsu MAN3735 Manuale Utente
C141-E124-01EN
6 - 5
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Issuing the FORMAT UNIT command
Issue the FORMAT UNIT command and initialize the entire disk media surface.
In this FORMAT UNIT command, the entire disk media surface is initialized using the P List, then
after initialization, the data blocks are verified. If any defective blocks are detected in the Verify
operation, alternate blocks are allocated for those data blocks. Also, the defect position
information for only the defective data blocks detected in the Verify operation is recorded in the G
List.
after initialization, the data blocks are verified. If any defective blocks are detected in the Verify
operation, alternate blocks are allocated for those data blocks. Also, the defect position
information for only the defective data blocks detected in the Verify operation is recorded in the G
List.
The contents which need to be specified at this time are as follows.
a.
CDB specification
Specify "0" in the "FmtData" bit and the "CmpLst" and "000" in the "Defect List Format" field
in the CDB.
in the CDB.
b. FORMAT parameters
If the items values in the previous item are specified in the CDB, the Format parameter is not
necessary.
necessary.
6.2.2
Re-initialization
The INIT can reinitialize the disk drive after it has been operated using the FORMAT UNIT
command.
command.
Note:
If it is necessary after reinitialization to restore the data that were stored on the disk media, it is
necessary to save the data before executing reinitialization, then execute data restore using
system software after reinitialization.
necessary to save the data before executing reinitialization, then execute data restore using
system software after reinitialization.
The INIT can change the size of the spare sector area and its location as well as the number of
logical data blocks before reinitialization. The recommended procedure for reinitialization is
shown below. However, in cases where the logical data block length is changed, the initialization
procedure described in Section 6.2.1 must be followed during installation.
logical data blocks before reinitialization. The recommended procedure for reinitialization is
shown below. However, in cases where the logical data block length is changed, the initialization
procedure described in Section 6.2.1 must be followed during installation.
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MODE SELECT command
If the logical data block count (size of the User Space) or the size of the spare sector area and its
location are changed, issue the MODE SELECT EXTENDED command and specify the disk
media format attributes. The parameter specification method is the same as in the case of
initialization processing during installation, described in Section 6.2.1. If the same format
attributes as at present will continue to be used, it is not necessary to issue the MODE SELECT
EXTENDED command.
location are changed, issue the MODE SELECT EXTENDED command and specify the disk
media format attributes. The parameter specification method is the same as in the case of
initialization processing during installation, described in Section 6.2.1. If the same format
attributes as at present will continue to be used, it is not necessary to issue the MODE SELECT
EXTENDED command.