Enable DMA for hda @ boottime?

[Guest arise]

Hi, i am currently running the following command manually after each (re)boot, and i want to make it execute automatically:

 

"hdparm -c3d1X66 /dev/hda" - Enables 32bit access, DMA and ATA66 speeds.

 

I have an ATA100 drive (UDMA5), how can i make hdparm to use the max speed?

 

Thanks :)

[Cannonfodder]

Are you asking how to use hdparm or how to make it run automatically?

[bvc]

from /etc/rc.d/rc.sysinit about 3/4 down

# Turn on harddisk optimization

# There is only one file /etc/sysconfig/harddisks for all disks

# after installing the hdparm-RPM. If you need different hdparm parameters

# for each of your disks, copy /etc/sysconfig/harddisks to

# /etc/sysconfig/harddiskhda (hdb, hdc...) and modify it.

# Each disk which has no special parameters will use the defaults.

# Each non-disk which has no special parameters will be ignored.

just put the command at the bottom of /etc/sysconfig/harddisk if you only have one hd.

[Guest ndeb]

"hdparm -c3d1X66 /dev/hda" - Enables 32bit access, DMA and ATA66 speeds. 

 

I have an ATA100 drive (UDMA5), how can i make hdparm to use the max speed?

Replace the 66 by 69 in ur hdparm command. Just as a note, the 66 in ur command does not stand for the speed value 66 MB/s, but for the value: 64+UDMA mode.

ATA66 = UDMA mode 2

ATA100 = UDMA mode 5

[Guest arise]

yes i noticed too...i ran hdparm -X udma5 /dev/hda and executed "-X69".

 

I will edit the rc.sysinit and see what happens :)

 

ANother question....where could i find RPMs for apt-get? (mandrake 9)

[BobGuy©]

just put the command at the bottom of /etc/sysconfig/harddisk if you only have one hd.

 

Well I just happen to have more than one hd. Makes it easier to do backups. :D

 

looking at that file it dosent look like it's going to be easy for a non programer.

 

All I need to add is -u1 -c3 to whats already there. :x

 

1021 if [ -x /sbin/hdparm ]; then

1022 for device in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do

1023 unset MULTIPLE_IO USE_DMA EIDE_32BIT LOOKAHEAD EXTRA_PARAMS

1024 if [ -f /etc/sysconfig/harddisk${disk[$device]} ]; then

1025 . /etc/sysconfig/harddisk${disk[$device]}

1026 HDFLAGS[$device]=

1027 if [ -n "$MULTIPLE_IO" ]; then

1028 HDFLAGS[$device]="-q -m$MULTIPLE_IO"

1029 fi

1030 if [ -n "$USE_DMA" ]; then

1031 HDFLAGS[$device]="${HDFLAGS[$device]} -q -d$USE_DMA"

1032 fi

1033 if [ -n "$EIDE_32BIT" ]; then

1034 HDFLAGS[$device]="${HDFLAGS[$device]} -q -c$EIDE_32BIT"

1035 fi

1036 if [ -n "$LOOKAHEAD" ]; then

1037 HDFLAGS[$device]="${HDFLAGS[$device]} -q -A$LOOKAHEAD"

1038 fi

1039 if [ -n "$EXTRA_PARAMS" ]; then

1040 HDFLAGS[$device]="${HDFLAGS[$device]} $EXTRA_PARAMS"

1041 fi

1042 else

1043 HDFLAGS[$device]="${HDFLAGS[0]}"

1044 fi

1045 if [ -e "/proc/ide/${disk[$device]}/media" ]; then

1046 hdmedia=`cat /proc/ide/${disk[$device]}/media`

1047 if [ "$hdmedia" = "disk" -o -f "/etc/sysconfig/harddisk${disk[$device]}" ]; then

1048 if [ -n "${HDFLAGS[$device]}" ]; then

1049 action "Setting hard drive parameters for %s: " ${disk[$device]} /sbin/hdparm ${HDFLAGS[$device]} /dev/${disk[$device]}

1050 fi

1051 fi

1052 fi

1053 done

1054 fi

[bvc]

Well I just happen to have more than one hd.

Then look for a /etc/sysconfig/harddisk and rename it harddiskhda, then make another one called harddiskhdb. Put what's needed for hda in harddiskhda, and what's needed for hdb in harddiskhdb. Read the quote I made above from /etc/rc.d/rc.sysinit about 3/4 down.