Hitachi hard disk 0J11285 500 GB 2.5 " 8 MB 0J11285 Ficha De Dados
Códigos do produto
0J11285
Z5K500 OEM Specifications
76
14.2.3
DEVICE CONFIGURATION IDENTIFY
(subcommand 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.
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
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.
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 register, and invalid bit location is returned to
LBA Mid register. The Definition of error information is shown on the next page.
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 register, and invalid bit location is returned to
LBA Mid register. The Definition of error information 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.
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