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DIAG displays the following messages after you specify the hard
disk parameters:
WARNING
All data on Hard disk you have
specified may be LOST...
Do you still want to continue (Y/N)?
Press Y and Enter to start analyzing the hard disk. Press N and
Enter to stop the operation.
Performance Test
This test checks the performance of your hard disk. It
determines the data transfer rate and track-to-track seek time
based on the transfer sire, seek count, and the amount of data
transferred.
The interleave factor is the most critical factor in determining
disk performance. Changing the interleave factor can drastically
change disk performance.
DIAG measures the data transfer rate in kilobytes per second.
To measure the data transfer rate, DIAG reads 64KB of data 15
times and counts the number of timer ticks using this formula:
Transfer rate = (64KB x 15 x 18.2) / # timer ticks
DIAG measures track-to-track seek time in milliseconds using
this formula:
Seek time = (# timer ticks x 1000) / 18.2 x 200
The number of seeks is 200.
A higher data transfer rate and a lower seek time indicate better
disk performance.
System Diagnostics 27