HGST HUS724040ALS640 User Manual

HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
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18.4.2 Initialization Pattern
Table 45: 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 format-
ted.
• Initialization Pattern Type
- Type of 0 will use a default initialization pattern.
- Type of 1 specifies 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.
- If Initialization Pattern Type is 0 and the Initialization Pattern Length is not set to 0, Check Condition status will be
returned, with the sense key set to Illegal Request and the additional sense code set to Invalid Field in Parameter
List
- If Initialization Pattern Type is 1 and the Initialization Pattern Length is set to 0, Check Condition status will be
returned, with the sense key set to Illegal Request and the additional sense code set to Invalid Field in Parameter
List.
• 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.
18.4.3 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
Byte
BIT
76543210
0 IP Modifier = 0 SI Reserved = 0
1 Initialization Pattern Type = 0 or 1
2 - 3 Initialization Pattern Length (n-3)
4
Initialization Pattern
...
Initialization Pattern
...
n

HGST HUS724040ALS640 Specifications

General

Brand	HGST
Model	HUS724040ALS640
Category	Storage
Language	English