HGST HUS724040ALS640 User Manual

HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
156
18.10.9 Mode Page 0A (Control Mode Page Parameters)
Table 111: Page 0A (Control Mode Page Parameters)
Following are parameter options for Page 0A.
The Descriptor Sense Data (D_SENSE) bit controls the format in which the drive returns sense data for
CHECK_CONDITION status:
- Setting the D_SENSE bit to 0 specifies that the drive shall return fixed format sense data for
CHECK_CONDITION.
- Setting the D_SENSE bit to 1 specifies that the drive shall return descriptor format sense data for
CHECK_CONDITION
•DPICZ (Disable Protection Information Check if protect field is Zero) bit set to zero indicates that checking of protection
information bytes is enabled. A DPICZ bit set to one indicates that checking of protection information is disabled on
commands with:
a) the RDPROTECT field (see SBC-3) set to zero;
b) the VRPROTECT field (see SBC-3) set to zero; or
c) the ORPROTECT field (see SBC-3) set to zero.
• Queue algorithm modifier specifies restrictions on the algorithm used for reordering commands that are tagged with the
SIMPLE message.
0h: Restricted reordering. The Target shall reorder the actual execution sequence of the queued commands from each
Initiator such that data integrity is maintained for that Initiator.
1h: Unrestricted reordering allowed. The Target may reorder the actual execution sequence of the queued commands
in any manner it selects. Any data integrity exposures related to command sequence order are explicitly handled by
the Initiator through the selection of appropriate commands and queue tag messages.
2h-7h: RESERVED.
8: Command reordering is disabled
9-Fh: RESERVED
• QErr (Queue Error Management) The queue error management (Q
ERR) field specifies how the device server shall han-
Byte
Bit Default
765432 10
0 PS 0 Page Code = 0Ah 8Ah
1 Page Length = 0Ah 0Ah
2TST=0
TMFonly
=0
DPICZ D_Sense GLTSD=0 RLEC=0 04h
3 Queue Algorithm Modifier Rsvd=0 QErr DQue 00h
4 RSVD=0 RAC=0
UA_INTLCK_CTRL=0
SWP=0 Obsolete 00h
5 ATO TAS=0 ATMPE RWWP Rsvd=0 00h
6-7 Obsolete=0 00h
8-9 (MSB) Busy Timeout Period (LSB) 00h
10-11 (MSB) Extended Self-test Routine Completion Time (LSB) XXh

HGST HUS724040ALS640 Specifications

General

Brand	HGST
Model	HUS724040ALS640
Category	Storage
Language	English