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5-56 C141-E239
Table 5.10 Features Field values (subcommands) and functions (1/3)
Features Field Function
X’D0’ SMART READ DATE:
A device that received this subcommand saves all the updated attribute
values. The device then transfers 512-byte attribute value information to the
host after transferring PIOSU.
* For information about the format of the attribute value information, see
Table 5.11.
X’D1’ SMART READ ATTRIBUTE THRESHOLDS:
This subcommand is used to transfer 512-byte guarantee failure threshold
value data to the host.
* For information about the format of the guarantee failure threshold value
data, see Table 5.12.
X’D2’ SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE:
Enables (by setting the Sector Count field to a value other than 00h) or disables
(by setting the Sector Count field to 00h) a function that automatically saves
device attribute values (“automatic attribute save function”). This setting is
held regardless of whether the device is turned on or off. If the automatic
attribute save function is enabled and more than 15 minutes has elapsed
since the last time that attributes were saved, then the attributes are saved.
However, if the automatic attribute save function is disabled, the attributes
are not saved. Upon receiving this subcommand, a device enables or
disables the automatic attribute save function, and transfers the RegDH, then
reports the status.
* It is assumed that it permits in the factory shipment in this drive.
X’D3’ SMART SAVE ATTRIBUTE VALUES:
When the device receives this subcommand, if saves device attribute value
data, and transfers the RegDH, then reports the status.
X’D4’ SMART EXECUTIVE OFF-LINE IMMEDIATE:
A device which receives this command starts collecting the off-line data
specified in the Sector Number field, or stops.
In the off-line mode, after transferring the RegDH, off-line data are
collected. In the captive mode, it collects off-line data then transfers the
RegDH when collection of data is completed.
SN Off-line data collection mode
00h: Off-line diagnosis (off-line mode)
01h: Simple self-test (off-line mode)
02h: Comprehensive self-test (off-line mode)
03h: Conveyance self-test (off-line mode)
04h: Selective self-test (off-line mode)
7Fh: Self-test stop
81h: Simple self-test (captive mode)
82h: Comprehensive self-test (captive mode)
83h: Conveyance self-test (captive mode)
84h: Selective self-test (captive mode)