Hitachi HUS154530VLF400 User Manual

                                    

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification

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• FMTPINFO (Format Protection Information) set to zero specifies that the drive shall disable the use of protection 

information and format to the block size specified.  FMTPINFO set to one specifies that the drive shall enable the use 
of protection information and format to the block size specified + 8 (e.g., if the block length is 512, then the format-
ted block length is 520).  Following a successful format, the PROT_EN bit in the READ CAPACITY (16) parameter 
data indicates whether protection information is enabled.  When protection information is written during a FORMAT 
UNIT command (i.e., the FMTPINFO bit is set to one), protection information shall be written with a default value of 
all FF's.

• RTO_REQ (Reference Tag Own Request) specifies whether the initiator or drive has ownership of the Logical Block 

Reference Tag field in protection information.  If the FMTPINFO bit is set to zero and the RTO_REQ bit is set to one, 
Check Condition status will be returned, with the sense key set to Illegal Request and the additional sense code set to 
Invalid Field in CDB. 

If the FMTPINFO bit is set to one and the RTO_REQ bit is set to one, application client ownership of the Logical 
Block Reference Tag field is enabled, (i.e. the initiator owns the Logical Block Reference Tag field).  If the FMT-
PINFO bit is set to one the the RRTO_REQ bit is set to zero, application client ownership of the Logical Block Refer-
ence Tag field is disabled (i.e. the drive owns the Logical Block Reference Tag field).  Following a successful format, 
the RTO_EN bit in the READ CAPACITY (16) parameter data indicates whether application client ownership of the 
Logical Block Reference Tag field is enabled.

• FmtData set to one specifies that a Data Out phase follows the Command phase.  The Data Out phase consists of a 

Parameter List header, optionally followed by an Initialization Pattern Descriptor, optionally followed by a Defect 
List.  If FmtData=0, the following defaults are assumed:  DPRY=0, DCRT=1, STPF=1, IP=0, DSP=0, Immed=0. 

• CmpLst 

•  - set to one specifies that the Grown Defect List (GList) existing prior to the issuance of the Format Unit command 

be discarded.  If provided, the DList then becomes the GList.  Following these operations, the Drive will be formatted 
with the PList and GList.

• - set to zero specifies that the GList existing prior to the issuance of the Format Unit command is retained.  If pro-

vided, the DList is combined with the GList to become the new GList.  Following these operations, the Drive will be 
formatted with the PList and GList.

Note: The drive manages two internal defect lists and one external. The Plist is created at time of manufacture. The Glist is 
built after manufacture by the Initiators’ use of the REASSIGN BLOCK command and the Automatic Reallocate functions. 
The Dlist is an external list. It is supplied by the Initiator in the Data Out phase of the FORMAT UNIT command. 

• Defect List Format specifies the format of the defect descriptor transferred to the Target when FmtData bit is set to one. 

The Target supports the following three defect descriptor formats for the FORMAT UNIT command: