Ok Kent: Seems that your I/O subsystem supports Ultra DMA 4 ( udma ) but is using Ultra DMA 2 ( udma2 ) as reported by hdparm " DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4" As root, Try to execute next sentence and repeat the hdparm -tT commands to see if values are increased hdparm -d1 -X68 /dev/hda With this we assure that DMA are activated ( -d1 ) and that we are using UDMA4 ( -X64 + 4 ) as explained in man hdparm Prelink: Execute rpm -qa | grep prelink If returns nothing download from http://www.rpmfind.net/linux/rpm2html/search.php?query=prelink&submit=Search+... ( if this link doesn't run try same link with ! (exclamation) to the end without blank spaces after ... ) install it with rpm -i prelink<version>.rpm Once installed go to /etc/cron.daily Assure that a prelink executable file exists. If not create one with this content : #================================================================================== #!/bin/sh . /etc/sysconfig/prelink renice +19 -p $$ >/dev/null 2>&1 if [ "$PRELINKING" != yes ]; then if [ -f /etc/prelink.cache ]; then echo /usr/sbin/prelink -uav > /var/log/prelink.log /usr/sbin/prelink -uav >> /var/log/prelink.log 2>&1 rm -f /etc/prelink.cache # Restart init if needed [ -n "$(find `ldd /sbin/init | awk '{ print $3 }'` /sbin/init -ctime -1 2>/d ev/null )" ] && /sbin/telinit u fi exit 0 fi if [ ! -f /etc/prelink.cache -o -f /var/lib/misc/prelink.force ] \ || grep -q '^prelink-ELF0.[0-2]' /etc/prelink.cache; then # If cache does not exist or is from older prelink versions or # if we were asked to explicitely, force full prelinking rm -f /etc/prelink.cache /var/lib/misc/prelink.force PRELINK_OPTS="$PRELINK_OPTS -f" date > /var/lib/misc/prelink.full elif [ -n "$PRELINK_FULL_TIME_INTERVAL" \ -a "`find /var/lib/misc/prelink.full -mtime -${PRELINK_FULL_TIME_INTERVAL} 2>/dev/null`" \ = /var/lib/misc/prelink.full ]; then # If prelink without -q has been run in the last # PRELINK_FULL_TIME_INTERVAL days, just use quick mode PRELINK_OPTS="$PRELINK_OPTS -q" else date > /var/lib/misc/prelink.full fi echo /usr/sbin/prelink -av $PRELINK_OPTS > /var/log/prelink.log /usr/sbin/prelink -av $PRELINK_OPTS >> /var/log/prelink.log 2>&1 # Restart init if needed [ -n "$(find `ldd /sbin/init | awk '{ print $3 }'` /sbin/init -ctime -1 2>/dev/null )" ] && /sbin/telinit u exit 0 #================================================================================== You must have something like this under /etc/cron.daily ls -l /etc/cron.daily <OTHER_FILES> -rwxr-xr-x 1 root root 1455 oct 27 20:32 prelink <OTHER_FILES> Now, force prelink execution with this command /etc/cron.daily/prelink After a while, when prelink has done the job, use the computer and see if experience is better. To make hdparm changes survive to reboot, edit /etc/sysconfig/harddisks and at the end of the file add EXTRA_PARAMS=-X68 Will be helfull if you can send again the hdparm -tT results after hdparm changes and explain what kind of applications are you using in the computer/s. Send, if you want the output of the next command chkconfig --list to see what services we can stop if you the are never used. HTH David Ballester Montolio Responsable de Sistemas y Comunicaciones Kern Pharma, S.L. www.kernpharma.com GNU! -- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list
