System Performances

[gustavo halperin <ggh.develop@gmail.com>]

Hello I have some questions about system performances.

By now I have the current 'hdparm' settings: -m16 -c3 -u1 -Xudma5
Then the  'hdparm -Tt /dev/hda' show the next results:
   /dev/hda:
   Timing cached reads:   1376 MB in  2.00 seconds = 686.58 MB/sec
   Timing buffered disk reads:   50 MB in  3.02 seconds =  16.53 MB/sec
But if the configuration is '-m0 -c0 -u0 ' the result from 'hdparm -Tt' 
is the same, so there are any way to improve this Timings ??

Second If I set with 'hdparm' the settings '-S 12' and '-y' always after 
few minutes the drive state back to 'active/idle', that is OK.

Last, the configurations of the "performance-settings Linux  VM" 
(/proc/sys/vm/<files>) and the "system wide limit for file handles" 
(/proc/sys/fs/file_max) can improve system behave ? How can I know what 
are the best configurations ??

Thank you,
  Gustavo