Philips DVDR3590H Service Manual page 85

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Firmware Upgrading & Diagnostic Software
Nucleus Name
Nucleus Number
Description
Technical
Execution Time
User Input
Error
Example
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DS_HDD_RandomReadScan
2108
Perform a short random read scan of x times 1000 commands (x is
selectable between 1 to 20) to test the servo. If anything would
be wrong with the servo or tracking, the result would be too
slow. Recheck the LBA addresses that caused the disc to fail in
order to avoid incorrect failure caused by shock or vibrations
during the measurement.
- Initialise the HDD connection
- Get the user input
- Generate a random sequence of test sectors
- For every sector in the random sequence do
- Read 1000 sectors and measure the time to perform this action
- Update a list of statistics about the measurement
- Display statistical information about the test sequence
- If more than 10% above 160 ms and/or more than 1 request in between
200 & 250ms and/or requests above 250 ms make the result of the test fail.
Depending on the user input x times 4 minutes
parameters in the next format:
<nr_cmds><GRAPH>
- Number of commands to send (in multiples of 1000), if no input
is given 1000 commands will be sent
- "GRAPH" optional to print out the measured read scan graph
Number Description
210800 Communication with the hard disk drive succeeded
210801 The initialisation of the HDD failed
210802 Invalid user input
210803 Performance failure: more than 10% above 160 ms and/or
more than 1 request in between 200 & 250ms and/or
requests above 250 msec
210804 Read error, unable to read a specified sector from disc
DS:> 2108 1
210800:
Minimum access time = 142 msec
Maximum access time = 159 msec
Average access time = 146 msec
Number of commands below 160 msec = 1000
Number of commands between 160 and 200 msec = 0
Number of commands between 200 and 250 msec = 0
Number of commands above 250 = 0
Test OK @
3139 785 32804 5. EN 85