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stefan@stefan:~$ sudo hdparm /dev/hdc
Password:

/dev/hdc:
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
stefan@stefan:~$

## This is the default configuration for hdparm for Debian.  It is a
## rather simple script, so please follow the following guidelines :)
## Any line that begins with a comment is ignored - add as many as you
## like.  Note that an in-line comment is not supported.  If a line
## consists of whitespace only (tabs, spaces, carriage return), it will be
## ignored, so you can space control fields as you like.  ANYTHING ELSE
## IS PARSED!!  This means that lines with stray characters or lines that
## use non # comment characters will be interpreted by the initscript. 
## This has probably minor, but potentially serious, side effects for your
## hard drives, so please follow the guidelines.  Patches to improve
## flexibilty welcome.  Please read /usr/share/doc/hdparm/README.Debian for
## notes about known issues, especially if you have an MD array.
##
## Note that if the init script causes boot problems, you can pass 'nohdparm'
## on the kernel command line, and the script will not be run.
##
## Uncommenting the options below will cause them to be added to the DEFAULT
## string which is prepended to options listed in the blocks below.
##
## If an option is listed twice, the second instance replaces the first.
##
## /sbin/hdparm is not run unless a block of the form:
##      DEV {
##         option
##         option
##         ...
##      }
## exists.  This blocks will cause /sbin/hdparm OPTIONS DEV to be run.
## Where OPTIONS is the concatenation of all options previously defined
## outside of a block and all options defined with in the block.

# -q be quiet
quiet
# -a sector count for filesystem read-ahead
#read_ahead_sect = 12
# -A disable/enable the IDE drive's read-lookahead feature
#lookahead = on
# -b bus state
#bus = on
# -B apm setting
#apm = 255
# -c enable (E)IDE 32-bit I/O support - can be any of 0,1,3
#io32_support = 1
# -d disable/enable the "using_dma" flag for this drive
#dma = off
# -D enable/disable the on-drive defect management
#defect_mana = off
# -E cdrom speed
#cd_speed = 16
# -k disable/enable the "keep_settings_over_reset" flag for this drive
#keep_settings_over_reset = off
# -K disable/enable the drive's "keep_features_over_reset" flag
#keep_features_over_reset = on
# -m sector count for multiple sector I/O
#mult_sect_io = 32
# -P maximum sector count for the drive's internal prefetch mechanism
#prefetch_sect = 12
# -r read-only flag for device
#read_only = off
# -S standby (spindown) timeout for the drive
#spindown_time = 24
# -u interrupt-unmask flag for the drive
#interrupt_unmask = on
# -W Disable/enable the IDE drive's write-caching feature
#write_cache = off
# -X IDE transfer mode for newer (E)IDE/ATA2 drives
#transfer_mode = 34
# -y force to immediately enter the standby mode
#standby
# -Y force to immediately enter the sleep mode
#sleep
# -Z Disable the power-saving function of certain Seagate drives
#disable_seagate
# -M Set the acoustic management properties of a drive
#acoustic_management
# -p Set the chipset PIO mode
# chipset_pio_mode

# Root file systems.  Please see README.Debian for details
# ROOTFS = /dev/hda

## New note - you can use straight hdparm commands in this config file
## as well - the set up is ugly, but it keeps backwards compatibility
## Additionally, it should be noted that any blocks that begin with
## the keyword 'command_line' are not run until after the root filesystem
## is mounted.  This is done to avoid running blocks twice.  If you need
## to run hdparm to set parameters for your root disk, please use the
## standard format.

#Samples follow:
#First three are good for devfs systems, fourth one for systems that do
#not use devfs.  The fifth example uses straight hdparm command line
#syntax.  Any of the blocks that use command line syntax must begin with
#the keyword 'command_line', and no attempt is made to validate syntax. 
#It is provided for those more comfortable with hdparm syntax.

#/dev/discs/disc0/disc {
# mult_sect_io = 16
# write_cache = off
# spindown_time = 240
#}

#/dev/discs/disc1/disc {
# mult_sect_io = 32
# spindown_time = 36
# write_cache = off
#}

#/dev/cdroms/cdrom0 {
# dma = on    
# interrupt_unmask = on
# io32_support = 0
#}

#/dev/hda {
# mult_sect_io = 16
# write_cache = off
# dma = on
#}

#command_line {
#       hdparm -q -m16 -q -W0 -q -d1 /dev/hda
#}
/dev/cdrom {
       dma = on
}

#/dev/hdc {
#   dma = on
#}
   }

stefan@stefan:~$ hdparm /dev/hdc

/dev/hdc:
 IO_support   =  1 (32-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
stefan@stefan:~$

## This is the default configuration for hdparm for Debian.  It is a
## rather simple script, so please follow the following guidelines :)
## Any line that begins with a comment is ignored - add as many as you
## like.  Note that an in-line comment is not supported.  If a line
## consists of whitespace only (tabs, spaces, carriage return), it will be
## ignored, so you can space control fields as you like.  ANYTHING ELSE
## IS PARSED!!  This means that lines with stray characters or lines that
## use non # comment characters will be interpreted by the initscript.  
## This has probably minor, but potentially serious, side effects for your
## hard drives, so please follow the guidelines.  Patches to improve
## flexibilty welcome.  Please read /usr/share/doc/hdparm/README.Debian for
## notes about known issues, especially if you have an MD array.
##
## Note that if the init script causes boot problems, you can pass 'nohdparm'
## on the kernel command line, and the script will not be run.
##
## Uncommenting the options below will cause them to be added to the DEFAULT
## string which is prepended to options listed in the blocks below.
##
## If an option is listed twice, the second instance replaces the first.
##
## /sbin/hdparm is not run unless a block of the form:
##      DEV {
##         option
##         option
##         ...
##      }
## exists.  This blocks will cause /sbin/hdparm OPTIONS DEV to be run.
## Where OPTIONS is the concatenation of all options previously defined
## outside of a block and all options defined with in the block.

# -q be quiet
quiet
# -a sector count for filesystem read-ahead
#read_ahead_sect = 12
# -A disable/enable the IDE drive's read-lookahead feature
#lookahead = on
# -b bus state
#bus = on
# -B apm setting
#apm = 255
# -c enable (E)IDE 32-bit I/O support - can be any of 0,1,3
#io32_support = 1
# -d disable/enable the "using_dma" flag for this drive
#dma = off
# -D enable/disable the on-drive defect management
#defect_mana = off
# -E cdrom speed
#cd_speed = 16
# -k disable/enable the "keep_settings_over_reset" flag for this drive
#keep_settings_over_reset = off
# -K disable/enable the drive's "keep_features_over_reset" flag
#keep_features_over_reset = on
# -m sector count for multiple sector I/O
#mult_sect_io = 32
# -P maximum sector count for the drive's internal prefetch mechanism
#prefetch_sect = 12
# -r read-only flag for device
#read_only = off
# -S standby (spindown) timeout for the drive
#spindown_time = 24
# -u interrupt-unmask flag for the drive
#interrupt_unmask = on
# -W Disable/enable the IDE drive's write-caching feature
#write_cache = off
# -X IDE transfer mode for newer (E)IDE/ATA2 drives
#transfer_mode = 34
# -y force to immediately enter the standby mode
#standby
# -Y force to immediately enter the sleep mode
#sleep
# -Z Disable the power-saving function of certain Seagate drives
#disable_seagate
# -M Set the acoustic management properties of a drive
#acoustic_management
# -p Set the chipset PIO mode
# chipset_pio_mode

# Root file systems.  Please see README.Debian for details
# ROOTFS = /dev/hda

## New note - you can use straight hdparm commands in this config file
## as well - the set up is ugly, but it keeps backwards compatibility
## Additionally, it should be noted that any blocks that begin with
## the keyword 'command_line' are not run until after the root filesystem
## is mounted.  This is done to avoid running blocks twice.  If you need
## to run hdparm to set parameters for your root disk, please use the
## standard format.

#Samples follow:
#First three are good for devfs systems, fourth one for systems that do
#not use devfs.  The fifth example uses straight hdparm command line
#syntax.  Any of the blocks that use command line syntax must begin with
#the keyword 'command_line', and no attempt is made to validate syntax.  
#It is provided for those more comfortable with hdparm syntax.

#/dev/discs/disc0/disc {
# mult_sect_io = 16
# write_cache = off
# spindown_time = 240
#}

#/dev/discs/disc1/disc {
# mult_sect_io = 32
# spindown_time = 36
# write_cache = off
#}

#/dev/cdroms/cdrom0 {
# dma = on  
# interrupt_unmask = on
# io32_support = 0
#}

#/dev/hda {
# mult_sect_io = 16
# write_cache = off
# dma = on
#}

#command_line {
#       hdparm -q -m16 -q -W0 -q -d1 /dev/hda
#}
/dev/cdrom {
       dma = on
}

#/dev/hdc {
#   dma = on
#}
   }

dev/hdc {
dma = on
interrupt_unmask = on
io32_support = 1
mult_sect_io = 32
}

stefan@stefan:~$ sudo hdparm -u1 /dev/hdc

/dev/hdc:
 setting unmaskirq to 1 (on)
 unmaskirq    =  1 (on)
stefan@stefan:~$ sudo hdparm /dev/hdc

/dev/hdc:
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
stefan@stefan:~$

stefan@stefan:~$ sudo hdparm -c1 /dev/hdc
Password:

/dev/hdc:
 setting 32-bit IO_support flag to 1
 IO_support   =  1 (32-bit)
stefan@stefan:~$ hdparm /dev/hdc

/dev/hdc:
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
stefan@stefan:~$