HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
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all 0xFF's. Following a successful format, the PROT_EN bit in the READ CAPACITY (16) parameter data will indicate that
protection information is enabled and the P_TYPE field in the READ CAPACITY (16) parameter data will indicate the protec-
tion type.
•The Logical Block Guard field contains a CRC that covers the preceding user data. This field is generated/checked per
the SBC standard.
The Logical Block Application Tag field may be modified by the initiator if the ATO bit is set to zero in mode page 0x0A. If
the ATO bit is set to one, then the initiator shall not modify the Logical Block Application Tag field. This field is generated/
checked per the SBC standard.
• The Logical Block Reference Tag field is generated/checked depending on protection types. With Type 1 protection, the
Logical Block Reference Tag in the first logical block of the data transfer shall contain the least significant four bytes
of the LBA contained in the Logical Block Address field of the command. Subsequent blocks shall contain the previ-
ous logical block reference tag plus one. With Type 2 protection, the Logical Block Reference Tag in the first logical
block of the data transfer shall contain the value in the Expected Initial Logical Block Reference Tag field of the
command. Subsequent blocks shall contain the previous logical block reference tag plus one.
• FOV (Format Options Valid) bit set to zero indicates that the Target should use its default settings for the DPRY (0),
DCRT (1), STPF (1), IP (0), and DSP (1) bits. These bits must all be set to zero in the Parameter List Header when
FOV=0, or the command will be terminated with Check Condition status, sense key of Illegal Request, and additional
sense code of Invalid Field in Parameter List. FOV=1 indicates that the values set in DPRY, DCRT, STPF, IP, and
DSP will be defined as specified below.
• DPRY (Disable Primary) bit set to zero indicates that the Target does not use portions of the medium identified as defec-
tive in the primary defect Plist for Initiator addressable logical blocks. If the Target cannot locate the Plist or it cannot
determine whether a Plist exists, the Target terminates the FORMAT UNIT command as described for STPF=1. A
DPRY bit set to one indicates that the Target does not use the Plist to identify defective areas of the medium. The Plist
is not deleted. DPRY must be set to 0 when DCRT is set to 0.
• DCRT (Disable Certification) bit set to zero indicates that the Target performs a medium certification operation and gen-
erates a Certification List (Clist), and adds the Clist to the Glist. DPRY must be set to 0 when DCRT is set to 0. A
DCRT bit of one indicates that the Target does not generate a Clist or perform a certification process.
Note: Since the DCRT bit is part of the Data Out phase that follows the FORMAT command, the FCERT bit in
Mode Page 0 is provided to control certification when the FORMAT command is issued with no Data Out
phase. If a FORMAT command is issued with a Data Out phase then FCERT is ignored.
• STPF (Stop Format) bit must be set to one. If one or both of the following conditions occurs, the Target terminates the
FORMAT UNIT command with Check Condition status. The sense key is set to Medium Error and the additional
sense code is set to Defect List Not Found if the first condition occurred or to Defect List Error if the second condi-
tion occurred.
• The Target cannot locate a required Dlist nor determine that the list exists.
•The Target encounters an unrecoverable error while accessing a required Dlist.
• IP (Initialization Pattern) bit set to zero specifies that an initialization pattern descriptor is not included and all customer
data will be initialized to zeroes. An IP bit of one specifies that an Initialization Pattern Descriptor is included in the
FORMAT UNIT parameter list following the parameter list header.
Byte
BIT
76543210
0... n User Data
n... n+1 Logical Block Guard
n+2... n+3 Logical Block Application Tag
n+4... n+7 Logical Block Reference Tag
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