Hitachi HTS725050A9A364 Datasheet download pdf (Page 79)

7K500 OEM Specification

Page 79 of 176

14.2.3

14.2.314.2.3

14.2.3

DEVICE CONFIGURATION IDENTI

DEVICE CONFIGURATION IDENTIDEVICE CONFIGURATION IDENTI

DEVICE CONFIGURATION IDENTIFY (subcommand

FY (subcommand FY (subcommand

FY (subcommand

C2h)

C2h) C2h)

C2h)

The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO

data-in transfer. The content of this data structure indicates the selectable commands, modes, and

feature sets that the device is capable of supporting. If a DEVICE CONFIGURATION SET command

has been issued reducing the capabilities, the response to an IDENTIFY DEVICE or IDENTIFY

PACKET DEVICE command will reflect the reduced set of capabilities, while the DEVICE

CONFIGURATION IDENTIFY command will reflect the entire set of selectable capabilities.

The format of the Device Configuration Overlay data structure is shown on next page.

14.2.4

14.2.414.2.4

14.2.4

DEVICE CONFIGURATION SET (subcommand C3h)

DEVICE CONFIGURATION SET (subcommand C3h) DEVICE CONFIGURATION SET (subcommand C3h)

DEVICE CONFIGURATION SET (subcommand C3h)

The DEVICE CONFIGURATION SET command allows a device manufacturer or a personal

computer system manufacturer to reduce the set of optional commands, modes, or feature sets

supported by a device as indicated by a DEVICE CONFIGURATION IDENTIFY command. The

DEVICE CONFIGURATION SET command transfers an overlay that modifies some of the bits set

in words 63, 78, 79, 82, 83, 84, and 88 of the IDENTIFY DEVICE command response. When the bits

in these words are cleared, the device no longer supports the indicated command, mode, or feature

set. If a bit is set in the overlay transmitted by the device that is not set in the overlay received from

a DEVICE CONFIGURATION IDENTIFY command, no action is taken for that bit.

The format of the overlay transmitted by the device is described in the table at next page. The

restrictions on changing these bits are described in the text following that table. If any of the bit

modification restrictions described are violated or any setting is changed with DEVICE

CONFIGURATION SET command, the device shall return command aborted. At that case, error

reason code is returned to sector count register, invalid word location is returned to LBA High

is shown on the next page.

ERROR INFORMATION EXAMPLE 1:

After establish a protected area with SET MAX address, if a user attempts to execute DC SET or DC

RESTORE, device abort that command and return error reason code as below.

LBA High : 03h = word 3 is invalid

LBA Mid : 00h this register is not assigned in this case

Sector count : 06h = Protected area is now established

ERROR INFORMATION EXAMPLE 2:

When device is enabled the Security feature set, if user attempts to disable that feature, device abort

that command and return error reason code as below.

LBA High : 07h = word 7 is invalid

LBA Mid : 08h = bit 3 is invalid

Sector count : 04h = now Security feature set is enabled

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 175 176

Comments to this Manuals

No comments

Hitachi HTS725050A9A364 Datasheet Page 79

Comments to this Manuals

Related products and manuals for Internal hard drives Hitachi HTS725050A9A364