Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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Table 103:Initialization Pattern Descriptor:
• IP Modifier must be set to 0, indicating that the drive will not modify the initialization pattern.
•SI (Security Initialize) bit set to one specifies that all customer data sectors, including those that have been previously
reassigned, will be initialized. SI set to zero specifies that only the current customer accessible sectors will be for-
matted.
•Initialization Pattern Type must be set to one, specifying that the Initialization Pattern specified shall be repeated as
required to fill each logical block.
•Initialization Pattern Length specifies the number of bytes that follow in the Initialization Pattern field, and must be
less than or equal to the current block size, and non-zero.
•Initialization Pattern contains the data pattern to be written to the media.
•DSP (Disable Saving Parameters) bit when zero indicates the target is to save all the current MODE SELECT saveable
parameters during the format operation. When the bit is one, the target is not to save the current MODE SELECT
saveable parameters.
•Immed (Immediate) bit set to zero requests that status be returned at the end of the format operation. An immediate bit
set to one requests that status be returned immediately following CDB validation and transfer of data in the Data Out
phase. If the format operation, with the immediate bit set to one, terminates in error, DEFERRED ERROR SENSE
data is generated.
•Defect List Length field specifies the total length in bytes of the defect descriptors that follow (not including the Initial-
ization Pattern Descriptor, if any). Up to 1024 defect descriptors are allowed. The Defect List Length must be equal
to four times the number of defect descriptors for BLOCK format, or eight times the number of defect descriptors for
BYTES FROM INDEX and PHYSICAL SECTOR formats. Otherwise the command is terminated with Check Con-
dition status with the sense key set to Illegal Request and the additional sense code set to Invalid Field in Parameter
List.
19.4.2 Defect Descriptor
Three defect descriptor formats are supported. Entries are not required to be in ascending order. If an entry does not corre-
spond to a valid user addressable media location, the command terminates with Check Condition status with the sense key set
to Illegal Request and the additional sense code set to Invalide Field in Parameter List.

19.4.2.1 Block Format - 000b

Byte BIT
76543210
0 IP Modifier = 0 SI Reserved = 0
1 Initialization Pattern Type = 1
2 - 3 Initialization Pattern Length (n-3)