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Old 12-21-2003, 07:45 AM   #1
twisted_mind
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Registered: Dec 2003
Location: Mumbai, India
Distribution: Red Hat 9
Posts: 11

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Changed settings using hdparm...disk read speed dropped !


Using the command
hdparm -Tt /dev/hda
i got the results as :
/dev/hda:
Timing buffer-cache reads: 128 MB in 1.34 seconds =91.07 MB/sec
Timing buffered disk reads: 64 MB in 17.86 seconds = 41.08 MB/sec
I then ran the command
hdparm -X66 -d1 -u1 -m16 -c3 /dev/hda
and after that the command hdparm -Tt /dev/hda gave the following results:
/dev/hda:
Timing buffer-cache reads: 128 MB in 1.34 seconds =97.45 MB/sec
Timing buffered disk reads: 64 MB in 17.86 seconds = 28.41 MB/sec
I'm just a couple of weeks old to linux and realising that i had done something stupid, i rebooted back into windows. As is obvious, my "disk-read" had dropped to 28 from 41......so is there any way i can revert the settings as they were before i messed with them? i mean the default settings?
I'm really worried if these settings could kill my drive or smth...
With regards,
Umesh
 
Old 12-21-2003, 02:37 PM   #2
Tinkster
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Registered: Apr 2002
Location: in a fallen world
Distribution: slackware by choice, others too :} ... android.
Posts: 23,066
Blog Entries: 11

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Don't worry, those settings are temporary, and
gone after a reboot. The reason why your machine
got slower might be that the kernel already had
chosen the optimum DMA mode for your box,
and you might have picked a less efficient one.


Cheers,
Tink
 
Old 12-22-2003, 12:02 AM   #3
twisted_mind
LQ Newbie
 
Registered: Dec 2003
Location: Mumbai, India
Distribution: Red Hat 9
Posts: 11

Original Poster
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Thankx Tinkster.....and thank god i was soo worried that i did not log back into linux since i did that hdparm thingie.....
 
  


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