Diagnostic And Reset Considerations; Table 47: Reset Error Register Values - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

11.3 Diagnostic and Reset considerations

The Set Max password, the Set Max security mode and the Set Max unlock counter are not retained over a Power
On Reset but are retained over a Hard Reset or Soft Reset.
For each Reset and Execute Device Diagnostic, the diagnostic is done as follows:
Power On
Reset, Hard
Reset
Soft Reset
Execute Device
Diagnostic
In each case – Power On Reset [Hard Reset], Soft Reset, and the Execute Device Diagnostic command – the
Device 0 Error register value is interpreted using the table below.

Table 47: Reset error register values

Device 1 present?
Yes
Yes
Yes
Yes
No
No
The "x" indicates the appropriate Diagnostic Code for the Power on, RESET-, Soft Reset, or Device Diagnostic
error.
DASP– is read by Device 0 to determine if Device 1 is present. If Device 1 is present,
Device 0 shall read PDIAG– to determine when it is valid to clear the BSY bit and
whether Device 1 has powered on or reset without error, otherwise Device 0 clears the
BSY bit whenever it is ready to accept commands. Device 0 may assert DASP– to
indicate device activity. If Device 1 is not present, Device 0 does not Assert DASP– at
POR.
If Device 1 is present, Device 0 shall read PDIAG– to determine when it is valid to clear
the BSY bit and whether Device 1 has reset without any errors; otherwise, Device 0 shall
simply reset and clear the BSY bit. DASP– is asserted by Device 0 (and Device 1 if it is
present) in order to indicate device active.
If Device 1 is present, Device 0 shall read PDIAG– to determine when it is valid to clear
the BSY bit and if Device 1 passed or failed the EXECUTE DEVICE DIAGNOSTIC
command; otherwise, Device 0 shall simply execute its diagnostics and then clear the
BSY bit. DASP– is asserted by Device 0 (and Device 1 if it is present) in order to
indicate that the device is active.
PDIAG- Asserted?
Yes
Yes
No
No
(not read)
(not read)
Travelstar 80GN Hard Disk Drive Specification
Device 0 Passed
Yes
No
Yes
No
Yes
No
71
Error Register
01h
0xh
81h
8xh
01h
0xh