drivers/ide/Config.help

CONFIG_BLK_DEV_IDE
  If you say Y here, you will use the full-featured IDE driver to
  control up to ten ATA/IDE interfaces, each being able to serve a
  "master" and a "slave" device, for a total of up to twenty ATA/IDE
  disk/cdrom/tape/floppy drives.

  Useful information about large (>540 MB) IDE disks, multiple
  interfaces, what to do if ATA/IDE devices are not automatically
  detected, sound card ATA/IDE ports, module support, and other
  topics, is contained in <file:Documentation/ide.txt>. For detailed
  information about hard drives, consult the Disk-HOWTO and the
  Multi-Disk-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>.

  To fine-tune ATA/IDE drive/interface parameters for improved
  performance, look for the hdparm package at
  <ftp://ibiblio.org/pub/Linux/system/hardware/>.

  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read <file:Documentation/modules.txt> and
  <file:Documentation/ide.txt>. The module will be called ide-mod.o.
  Do not compile this driver as a module if your root file system (the
  one containing the directory /) is located on an IDE device.

  If you have one or more IDE drives, say Y or M here. If your system
  has no IDE drives, or if memory requirements are really tight, you
  could say N here, and select the "Old hard disk driver" below
  instead to save about 13 KB of memory in the kernel.

CONFIG_BLK_DEV_HD_ONLY
  There are two drivers for MFM/RLL/IDE hard disks. Most people use
  the newer enhanced driver, but this old one is still around for two
  reasons. Some older systems have strange timing problems and seem to
  work only with the old driver (which itself does not work with some
  newer systems). The other reason is that the old driver is smaller,
  since it lacks the enhanced functionality of the new one. This makes
  it a good choice for systems with very tight memory restrictions, or
  for systems with only older MFM/RLL/ESDI drives. Choosing the old
  driver can save 13 KB or so of kernel memory.

  If you are unsure, then just choose the Enhanced IDE/MFM/RLL driver
  instead of this one. For more detailed information, read the
  Disk-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>.

CONFIG_BLK_DEV_HD_IDE
  There are two drivers for MFM/RLL/IDE disks.  Most people use just
  the new enhanced driver by itself.  This option however installs the
  old hard disk driver to control the primary IDE/disk interface in
  the system, leaving the new enhanced IDE driver to take care of only
  the 2nd/3rd/4th IDE interfaces.  Doing this will prevent you from
  having an IDE/ATAPI CD-ROM or tape drive connected to the primary
  IDE interface.  Choosing this option may be useful for older systems
  which have MFM/RLL/ESDI controller+drives at the primary port
  address (0x1f0), along with IDE drives at the secondary/3rd/4th port
  addresses.

  Normally, just say N here; you will then use the new driver for all
  4 interfaces.

CONFIG_BLK_DEV_IDEDISK
  This will include enhanced support for MFM/RLL/IDE hard disks.  If
  you have a MFM/RLL/IDE disk, and there is no special reason to use
  the old hard disk driver instead, say Y.  If you have an SCSI-only
  system, you can say N here.

  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read <file:Documentation/modules.txt>.  The module
  will be called ide-disk.o.  Do not compile this driver as a module
  if your root file system (the one containing the directory /) is
  located on the IDE disk. If unsure, say Y.

CONFIG_IDEDISK_MULTI_MODE
  If you get this error, try to say Y here:

  hda: set_multmode: status=0x51 { DriveReady SeekComplete Error }
  hda: set_multmode: error=0x04 { DriveStatusError }

  If in doubt, say N.

CONFIG_BLK_DEV_IDECS
  Support for outboard IDE disks, tape drives, and CD-ROM drives
  connected through a  PCMCIA card.

CONFIG_BLK_DEV_IDECD
  If you have a CD-ROM drive using the ATAPI protocol, say Y. ATAPI is
  a newer protocol used by IDE CD-ROM and TAPE drives, similar to the
  SCSI protocol. Most new CD-ROM drives use ATAPI, including the
  NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI
  double(2X) or better speed drives.

  If you say Y here, the CD-ROM drive will be identified at boot time
  along with other IDE devices, as "hdb" or "hdc", or something
  similar (check the boot messages with dmesg). If this is your only
  CD-ROM drive, you can say N to all other CD-ROM options, but be sure
  to say Y or M to "ISO 9660 CD-ROM file system support".

  Note that older versions of LILO (LInux LOader) cannot properly deal
  with IDE/ATAPI CD-ROMs, so install LILO 16 or higher, available from
  <ftp://brun.dyndns.org/pub/linux/lilo/>.

  If you want to compile the driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read <file:Documentation/modules.txt>.  The module
  will be called ide-cd.o.

CONFIG_BLK_DEV_IDETAPE
  If you have an IDE tape drive using the ATAPI protocol, say Y.
  ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
  similar to the SCSI protocol.  If you have an SCSI tape drive
  however, you can say N here.

  You should also say Y if you have an OnStream DI-30 tape drive; this
  will not work with the SCSI protocol, until there is support for the
  SC-30 and SC-50 versions.

  If you say Y here, the tape drive will be identified at boot time
  along with other IDE devices, as "hdb" or "hdc", or something
  similar, and will be mapped to a character device such as "ht0"
  (check the boot messages with dmesg).  Be sure to consult the
  <file:drivers/ide/ide-tape.c> and <file:Documentation/ide.txt> files
  for usage information.

  If you want to compile the driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read <file:Documentation/modules.txt>.  The module
  will be called ide-tape.o.

CONFIG_BLK_DEV_IDEFLOPPY
  If you have an IDE floppy drive which uses the ATAPI protocol,
  answer Y.  ATAPI is a newer protocol used by IDE CD-ROM/tape/floppy
  drives, similar to the SCSI protocol.

  The LS-120 and the IDE/ATAPI Iomega ZIP drive are also supported by
  this driver. For information about jumper settings and the question
  of when a ZIP drive uses a partition table, see
  <http://www.win.tue.nl/~aeb/linux/zip/zip-1.html>.
  (ATAPI PD-CD/CDR drives are not supported by this driver; support
  for PD-CD/CDR drives is available if you answer Y to
  "SCSI emulation support", below).

  If you say Y here, the FLOPPY drive will be identified along with
  other IDE devices, as "hdb" or "hdc", or something similar (check
  the boot messages with dmesg).

  If you want to compile the driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read <file:Documentation/modules.txt>.  The module
  will be called ide-floppy.o.

CONFIG_BLK_DEV_IDESCSI
  This will provide SCSI host adapter emulation for IDE ATAPI devices,
  and will allow you to use a SCSI device driver instead of a native
  ATAPI driver.

  This is useful if you have an ATAPI device for which no native
  driver has been written (for example, an ATAPI PD-CD or CDR drive);
  you can then use this emulation together with an appropriate SCSI
  device driver. In order to do this, say Y here and to "SCSI support"
  and "SCSI generic support", below. You must then provide the kernel
  command line "hdx=scsi" (try "man bootparam" or see the
  documentation of your boot loader (lilo or loadlin) about how to
  pass options to the kernel at boot time) for devices if you want the
  native EIDE sub-drivers to skip over the native support, so that
  this SCSI emulation can be used instead. This is required for use of
  CD-RW's.

  Note that this option does NOT allow you to attach SCSI devices to a
  box that doesn't have a SCSI host adapter installed.

  If both this SCSI emulation and native ATAPI support are compiled
  into the kernel, the native support will be used.

CONFIG_BLK_DEV_ISAPNP
  If you have an ISA EIDE card that is PnP (Plug and Play) and
  requires setup first before scanning for devices, say Y here.

  If unsure, say N.

CONFIG_BLK_DEV_CMD640
  The CMD-Technologies CMD640 IDE chip is used on many common 486 and
  Pentium motherboards, usually in combination with a "Neptune" or
  "SiS" chipset. Unfortunately, it has a number of rather nasty
  design flaws that can cause severe data corruption under many common
  conditions. Say Y here to include code which tries to automatically
  detect and correct the problems under Linux. This option also
  enables access to the secondary IDE ports in some CMD640 based
  systems.

  This driver will work automatically in PCI based systems (most new
  systems have PCI slots). But if your system uses VESA local bus
  (VLB) instead of PCI, you must also supply a kernel boot parameter
  to enable the CMD640 bugfix/support: "ide0=cmd640_vlb". (Try "man
  bootparam" or see the documentation of your boot loader about how to
  pass options to the kernel.)

  The CMD640 chip is also used on add-in cards by Acculogic, and on
  the "CSA-6400E PCI to IDE controller" that some people have. For
  details, read <file:Documentation/ide.txt>.

CONFIG_BLK_DEV_CMD640_ENHANCED
  This option includes support for setting/autotuning PIO modes and
  prefetch on CMD640 IDE interfaces.  For details, read
  <file:Documentation/ide.txt>. If you have a CMD640 IDE interface
  and your BIOS does not already do this for you, then say Y here.
  Otherwise say N.

CONFIG_BLK_DEV_RZ1000
  The PC-Technologies RZ1000 IDE chip is used on many common 486 and
  Pentium motherboards, usually along with the "Neptune" chipset.
  Unfortunately, it has a rather nasty design flaw that can cause
  severe data corruption under many conditions. Say Y here to include
  code which automatically detects and corrects the problem under
  Linux. This may slow disk throughput by a few percent, but at least
  things will operate 100% reliably.

CONFIG_BLK_DEV_IDEPCI
  Say Y here for PCI systems which use IDE drive(s).
  This option helps the IDE driver to automatically detect and
  configure all PCI-based IDE interfaces in your system.

CONFIG_IDEPCI_SHARE_IRQ
  Some ATA/IDE chipsets have hardware support which allows for
  sharing a single IRQ with other cards. To enable support for
  this in the ATA/IDE driver, say Y here.

  It is safe to say Y to this question, in most cases.
  If unsure, say N.

CONFIG_BLK_DEV_IDEDMA_PCI
  If your PCI system uses IDE drive(s) (as opposed to SCSI, say) and
  is capable of bus-master DMA operation (most Pentium PCI systems),
  you will want to say Y here to reduce CPU overhead. You can then use
  the "hdparm" utility to enable DMA for drives for which it was not
  enabled automatically. By default, DMA is not enabled automatically
  for these drives, but you can change that by saying Y to the
  following question "Use DMA by default when available". You can get
  the latest version of the hdparm utility from
  <ftp://ibiblio.org/pub/Linux/system/hardware/>.

  Read the comments at the beginning of <file:drivers/ide/ide-dma.c>
  and the file <file:Documentation/ide.txt> for more information.

  It is safe to say Y to this question.

CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
  If you say Y here, the model and firmware revision of your drive
  will be compared against a blacklist of buggy drives that claim to
  be (U)DMA capable but aren't. This is a blanket on/off test with no
  speed limit options.

  Straight GNU GCC 2.7.3/2.8.X compilers are known to be safe;
  whereas, many versions of EGCS have a problem and miscompile if you
  say Y here.

  If in doubt, say N.

CONFIG_BLK_DEV_IDEDMA_TIMEOUT
  If you say Y here, this is a NASTY UGLY HACK!

  We have to issue an abort and requeue the request DMA engine got
  turned off by a goofy ASIC, and we have to clean up the mess, and
  here is as good as any.  Do it globally for all chipsets.

  If in doubt, say N.

CONFIG_BLK_DEV_OFFBOARD
  Normally, IDE controllers built into the motherboard (on-board
  controllers) are assigned to ide0 and ide1 while those on add-in PCI
  cards (off-board controllers) are relegated to ide2 and ide3.
  Answering Y here will allow you to reverse the situation, with
  off-board controllers on ide0/1 and on-board controllers on ide2/3.
  This can improve the usability of some boot managers such as lilo
  when booting from a drive on an off-board controller.

  If you say Y here, and you actually want to reverse the device scan
  order as explained above, you also need to issue the kernel command
  line option "ide=reverse". (Try "man bootparam" or see the
  documentation of your boot loader (lilo or loadlin) about how to
  pass options to the kernel at boot time.)

  Note that, if you do this, the order of the hd* devices will be
  rearranged which may require modification of fstab and other files.

  If in doubt, say N.

CONFIG_IDEDMA_PCI_AUTO
  Prior to kernel version 2.1.112, Linux used to automatically use
  DMA for IDE drives and chipsets which support it. Due to concerns
  about a couple of cases where buggy hardware may have caused damage,
  the default is now to NOT use DMA automatically. To revert to the
  previous behaviour, say Y to this question.

  If you suspect your hardware is at all flakey, say N here.
  Do NOT email the IDE kernel people regarding this issue!

  It is normally safe to answer Y to this question unless your
  motherboard uses a VIA VP2 chipset, in which case you should say N.

CONFIG_IDEDMA_IVB
  There are unclear terms is ATA-4 and ATA-5 standards how certain
  hardware (an 80c ribbon) should be detected. Different interpretations
  of the standards have been released in hardware. This causes problems:
  for example, a host with Ultra Mode 4 (or higher) will not run
  in that mode with an 80c ribbon.

  If you are experiencing compatibility or performance problems, you
  MAY try to answering Y here. However, it does not necessarily solve
  any of your problems, it could even cause more of them.

  It is normally safe to answer Y; however, the default is N.

CONFIG_IDEDMA_PCI_WIP
  If you enable this you will be able to use and test highly
  developmental projects. If you say N, the configurator will
  simply skip those options.

  It is SAFEST to say N to this question.

CONFIG_BLK_DEV_ADMA
  Please read the comments at the top of
  <file:drivers/ide/ide-adma.c>.

CONFIG_BLK_DEV_PDC_ADMA
  Please read the comments at the top of <file:drivers/ide/ide-pci.c>.

CONFIG_BLK_DEV_AEC62XX
  This driver adds up to 4 more EIDE devices sharing a single
  interrupt. This add-on card is a bootable PCI UDMA controller. In
  order to get this card to initialize correctly in some cases, you
  should say Y here, and preferably also to "Use DMA by default when
  available".

  The ATP850U/UF is an UltraDMA 33 chipset base.
  The ATP860 is an UltraDMA 66 chipset base.
  The ATP860M(acintosh) version is an UltraDMA 66 chipset base.

  Please read the comments at the top of <file:drivers/ide/aec62xx.c>.
  If you say Y here, then say Y to "Use DMA by default when available"
  as well.

CONFIG_AEC62XX_TUNING
  Please read the comments at the top of <file:drivers/ide/aec62xx.c>.
  If unsure, say N.

CONFIG_BLK_DEV_ALI15X3
  This driver ensures (U)DMA support for ALI 1533, 1543 and 1543C
  onboard chipsets.  It also tests for Simplex mode and enables
  normal dual channel support.

  If you say Y here, you also need to say Y to "Use DMA by default
  when available", above.  Please read the comments at the top of
  <file:drivers/ide/alim15x3.c>.

  If unsure, say N.

CONFIG_WDC_ALI15X3
  This allows for UltraDMA support for WDC drives that ignore CRC
  checking. You are a fool for enabling this option, but there have
  been requests. DO NOT COMPLAIN IF YOUR DRIVE HAS FS CORRUPTION, IF
  YOU ENABLE THIS! No one will listen, just laugh for ignoring this
  SERIOUS WARNING.

  Using this option can allow WDC drives to run at ATA-4/5 transfer
  rates with only an ATA-2 support structure.

  SAY N!

CONFIG_BLK_DEV_AMD74XX
  This driver ensures (U)DMA support for the AMD756/760 Viper
  chipsets.

  If you say Y here, you also need to say Y to "Use DMA by default
  when available", above.
  Please read the comments at the top of <file:drivers/ide/amd74xx.c>.

  If unsure, say N.

CONFIG_AMD74XX_OVERRIDE
  This option auto-forces the ata66 flag.
  This effect can be also invoked by calling "idex=ata66"
  If unsure, say N.

CONFIG_BLK_DEV_CMD64X
  Say Y here if you have an IDE controller which uses any of these
  chipsets: CMD643, CMD646, or CMD648.

CONFIG_BLK_DEV_CY82C693
  This driver adds detection and support for the CY82C693 chipset
  used on Digital's PC-Alpha 164SX boards.

  If you say Y here, you need to say Y to "Use DMA by default
  when available" as well.

CONFIG_BLK_DEV_CS5530
  Include support for UDMA on the Cyrix MediaGX 5530 chipset. This
  will automatically be detected and configured if found.

  It is safe to say Y to this question.

  People with SCSI-only systems should say N here. If unsure, say Y.

CONFIG_BLK_DEV_HPT34X
  This driver adds up to 4 more EIDE devices sharing a single
  interrupt. The HPT343 chipset in its current form is a non-bootable
  controller; the HPT345/HPT363 chipset is a bootable (needs BIOS FIX)
  PCI UDMA controllers. This driver requires dynamic tuning of the
  chipset during the ide-probe at boot time. It is reported to support
  DVD II drives, by the manufacturer.

CONFIG_HPT34X_AUTODMA
  This is a dangerous thing to attempt currently! Please read the
  comments at the top of <file:drivers/ide/hpt34x.c>.  If you say Y
  here, then say Y to "Use DMA by default when available" as well.

  If unsure, say N.

CONFIG_BLK_DEV_HPT366
  HPT366 is an Ultra DMA chipset for ATA-66.
  HPT368 is an Ultra DMA chipset for ATA-66 RAID Based.
  HPT370 is an Ultra DMA chipset for ATA-100.

  This driver adds up to 4 more EIDE devices sharing a single
  interrupt.

  The HPT366 chipset in its current form is bootable. One solution
  for this problem are special LILO commands for redirecting the
  reference to device 0x80. The other solution is to say Y to "Boot
  off-board chipsets first support" (CONFIG_BLK_DEV_OFFBOARD) unless
  your mother board has the chipset natively mounted. Regardless one
  should use the fore mentioned option and call at LILO or include
  "ide=reverse" in LILO's append-line.

  This driver requires dynamic tuning of the chipset during the
  ide-probe at boot. It is reported to support DVD II drives, by the
  manufacturer.

CONFIG_BLK_DEV_NS87415
  This driver adds detection and support for the NS87415 chip
  (used in SPARC64, among others).

  Please read the comments at the top of <file:drivers/ide/ns87415.c>.

CONFIG_BLK_DEV_OPTI621
  This is a driver for the OPTi 82C621 EIDE controller.
  Please read the comments at the top of <file:drivers/ide/opti621.c>.

CONFIG_BLK_DEV_SVWKS
  This driver adds PIO/(U)DMA support for the ServerWorks OSB4/CSB5
  chipsets.

CONFIG_BLK_DEV_PIIX
  This driver adds PIO mode setting and tuning for all PIIX IDE
  controllers by Intel.  Since the BIOS can sometimes improperly tune
  PIO 0-4 mode settings, this allows dynamic tuning of the chipset
  via the standard end-user tool 'hdparm'.

  Please read the comments at the top of <file:drivers/ide/piix.c>.

  If you say Y here, you should also say Y to "PIIXn Tuning support",
  below.

  If unsure, say N.

CONFIG_PIIX_TUNING
  This driver extension adds DMA mode setting and tuning for all PIIX
  IDE controllers by Intel. Since the BIOS can sometimes improperly
  set up the device/adapter combination and speed limits, it has
  become a necessity to back/forward speed devices as needed.

  Case 430HX/440FX PIIX3 need speed limits to reduce UDMA to DMA mode
  2 if the BIOS can not perform this task at initialization.

  If unsure, say N.

CONFIG_BLK_DEV_PDC202XX
  Promise Ultra33 or PDC20246
  Promise Ultra66 or PDC20262
  Promise Ultra100 or PDC20265/PDC20267/PDC20268

  This driver adds up to 4 more EIDE devices sharing a single
  interrupt. This add-on card is a bootable PCI UDMA controller. Since
  multiple cards can be installed and there are BIOS ROM problems that
  happen if the BIOS revisions of all installed cards (three-max) do
  not match, the driver attempts to do dynamic tuning of the chipset
  at boot-time for max-speed.  Ultra33 BIOS 1.25 or newer is required
  for more than one card. This card may require that you say Y to
  "Special UDMA Feature".

  If you say Y here, you need to say Y to "Use DMA by default when
  available" as well.

  Please read the comments at the top of
  <file:drivers/ide/pdc202xx.c>.

  If unsure, say N.

CONFIG_PDC202XX_BURST
  This option causes the pdc202xx driver to enable UDMA modes on the
  PDC202xx even when the PDC202xx BIOS has not done so.

  It was originally designed for the PDC20246/Ultra33, whose BIOS will
  only setup UDMA on the first two PDC20246 cards.  It has also been
  used succesfully on a PDC20265/Ultra100, allowing use of UDMA modes
  when the PDC20265 BIOS has been disabled (for faster boot up).

  Please read the comments at the top of
  <file:drivers/ide/pdc202xx.c>.

  If unsure, say N.

CONFIG_PDC202XX_FORCE
  For FastTrak enable overriding BIOS.

CONFIG_BLK_DEV_SIS5513
  This driver ensures (U)DMA support for SIS5513 chipset based
  mainboards. SiS620/530 UDMA mode 4, SiS5600/5597 UDMA mode 2, all
  other DMA mode 2 limited chipsets are unsupported to date.

  If you say Y here, you need to say Y to "Use DMA by default when
  available" as well.

  Please read the comments at the top of <file:drivers/ide/sis5513.c>.

CONFIG_BLK_DEV_SLC90E66
  This driver ensures (U)DMA support for Victroy66 SouthBridges for
  SMsC with Intel NorthBridges.  This is an Ultra66 based chipset.
  The nice thing about it is that you can mix Ultra/DMA/PIO devices
  and it will handle timing cycles.  Since this is an improved
  look-a-like to the PIIX4 it should be a nice addition.

  If you say Y here, you need to say Y to "Use DMA by default when
  available" as well.

  Please read the comments at the top of
  <file:drivers/ide/slc90e66.c>.

CONFIG_BLK_DEV_SL82C105
  If you have a Winbond SL82c105 IDE controller, say Y here to enable
  special configuration for this chip. This is common on various CHRP
  motherboards, but could be used elsewhere. If in doubt, say Y.

CONFIG_BLK_DEV_TRM290
  This driver adds support for bus master DMA transfers
  using the Tekram TRM290 PCI IDE chip. Volunteers are
  needed for further tweaking and development.
  Please read the comments at the top of <file:drivers/ide/trm290.c>.

CONFIG_BLK_DEV_VIA82CXXX
  This allows you to configure your chipset for a better use while
  running PIO/(U)DMA, it will allow you to enable efficiently the
  second channel dma usage, as it may not be set by BIOS.  It will try
  to set fifo configuration at its best.  It will allow you to get
  information from /proc/ide/via provided you enabled "/proc file
  system" support.

  Please read the comments at the top of
  <file:drivers/ide/via82cxxx.c>.

  If you say Y here, then say Y to "Use DMA by default when available"
  as well.

  If unsure, say N.

CONFIG_BLK_DEV_IDE_RAPIDE
  Say Y here if you want to support the Yellowstone RapIDE controller
  manufactured for use with Acorn computers.

CONFIG_IDE_CHIPSETS
  Say Y here if you want to include enhanced support for various IDE
  interface chipsets used on motherboards and add-on cards. You can
  then pick your particular IDE chip from among the following options.
  This enhanced support may be necessary for Linux to be able to
  access the 3rd/4th drives in some systems. It may also enable
  setting of higher speed I/O rates to improve system performance with
  these chipsets. Most of these also require special kernel boot
  parameters to actually turn on the support at runtime; you can find
  a list of these in the file <file:Documentation/ide.txt>.

  People with SCSI-only systems can say N here.

CONFIG_BLK_DEV_4DRIVES
  Certain older chipsets, including the Tekram 690CD, use a single set
  of I/O ports at 0x1f0 to control up to four drives, instead of the
  customary two drives per port. Support for this can be enabled at
  runtime using the "ide0=four" kernel boot parameter if you say Y
  here.

CONFIG_BLK_DEV_ALI14XX
  This driver is enabled at runtime using the "ide0=ali14xx" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster
  I/O speeds to be set as well.  See the files
  <file:Documentation/ide.txt> and <file:drivers/ide/ali14xx.c> for
  more info.

CONFIG_BLK_DEV_DTC2278
  This driver is enabled at runtime using the "ide0=dtc2278" kernel
  boot parameter. It enables support for the secondary IDE interface
  of the DTC-2278 card, and permits faster I/O speeds to be set as
  well. See the <file:Documentation/ide.txt> and
  <file:drivers/ide/dtc2278.c> files for more info.

CONFIG_BLK_DEV_HT6560B
  This driver is enabled at runtime using the "ide0=ht6560b" kernel
  boot parameter. It enables support for the secondary IDE interface
  of the Holtek card, and permits faster I/O speeds to be set as well.
  See the <file:Documentation/ide.txt> and
  <file:drivers/ide/ht6560b.c> files for more info.

CONFIG_BLK_DEV_PDC4030
  This driver provides support for the secondary IDE interface and
  cache of Promise IDE chipsets, e.g. DC4030 and DC5030.  This driver
  is known to incur timeouts/retries during heavy I/O to drives
  attached to the secondary interface.  CD-ROM and TAPE devices are
  not supported yet.  This driver is enabled at runtime using the
  "ide0=dc4030" kernel boot parameter.  See the
  <file:Documentation/ide.txt> and <file:drivers/ide/pdc4030.c> files
  for more info.

CONFIG_BLK_DEV_QD65XX
  This driver is enabled at runtime using the "ide0=qd65xx" kernel
  boot parameter.  It permits faster I/O speeds to be set.  See the
  <file:Documentation/ide.txt> and <file:drivers/ide/qd65xx.c> for
  more info.

CONFIG_BLK_DEV_UMC8672
  This driver is enabled at runtime using the "ide0=umc8672" kernel
  boot parameter. It enables support for the secondary IDE interface
  of the UMC-8672, and permits faster I/O speeds to be set as well.
  See the files <file:Documentation/ide.txt> and
  <file:drivers/ide/umc8672.c> for more info.

CONFIG_BLK_DEV_GAYLE
  This is the IDE driver for the builtin IDE interface on some Amiga
  models. It supports both the `A1200 style' (used in A600 and A1200)
  and `A4000 style' (used in A4000 and A4000T) of the Gayle IDE
  interface. Say Y if you have such an Amiga model and want to use IDE
  devices (hard disks, CD-ROM drives, etc.) that are connected to the
  builtin IDE interface.

CONFIG_BLK_DEV_FALCON_IDE
  This is the IDE driver for the builtin IDE interface on the Atari
  Falcon. Say Y if you have a Falcon and want to use IDE devices (hard
  disks, CD-ROM drives, etc.) that are connected to the builtin IDE
  interface.

CONFIG_BLK_DEV_BUDDHA
  This is the IDE driver for the IDE interfaces on the Buddha, 
  Catweasel and X-Surf expansion boards.  It supports up to two interfaces 
  on the Buddha, three on the Catweasel and two on the X-Surf.

  Say Y if you have a Buddha or Catweasel expansion board and want to
  use IDE devices (hard disks, CD-ROM drives, etc.) that are connected
  to one of its IDE interfaces.

CONFIG_BLK_DEV_IDEDOUBLER
  This driver provides support for the so-called `IDE doublers' (made
  by various manufacturers, e.g. Eyetech) that can be connected to the
  builtin IDE interface of some Amiga models. Using such an IDE
  doubler, you can connect up to four instead of two IDE devices on
  the Amiga's builtin IDE interface.

  Note that the normal Amiga Gayle IDE driver may not work correctly
  if you have an IDE doubler and don't enable this driver!

  Say Y if you have an IDE doubler.  The driver is enabled at kernel
  runtime using the "ide=doubler" kernel boot parameter.

CONFIG_BLK_DEV_IDE_PMAC
  This driver provides support for the built-in IDE controller on
  most of the recent Apple Power Macintoshes and PowerBooks.
  If unsure, say Y.

CONFIG_BLK_DEV_IDEDMA_PMAC
  This option allows the driver for the built-in IDE controller on
  Power Macintoshes and PowerBooks to use DMA (direct memory access)
  to transfer data to and from memory.  Saying Y is safe and improves
  performance.

CONFIG_BLK_DEV_IDEDMA_PMAC_AUTO
  This option allows the driver for the built-in IDE controller on
  Power Macintoshes and PowerBooks to use DMA automatically, without
  it having to be explicitly enabled.  This option is provided because
  of concerns about a couple of cases where using DMA on buggy PC
  hardware may have caused damage.  Saying Y should be safe on all
  Apple machines.

CONFIG_BLK_DEV_MAC_IDE
  This is the IDE driver for the builtin IDE interface on some m68k
  Macintosh models. It supports both the `Quadra style' (used in
  Quadra/ Centris 630 and Performa 588 models) and `Powerbook style'
  (used in the Powerbook 150 and 190 models) IDE interface.

  Say Y if you have such an Macintosh model and want to use IDE
  devices (hard disks, CD-ROM drives, etc.) that are connected to the
  builtin IDE interface.

CONFIG_BLK_DEV_IDE_ICSIDE
  On Acorn systems, say Y here if you wish to use the ICS IDE
  interface card.  This is not required for ICS partition support.
  If you are unsure, say N to this.

CONFIG_BLK_DEV_IDEDMA_ICS
  Say Y here if you want to add DMA (Direct Memory Access) support to
  the ICS IDE driver.

CONFIG_IDEDMA_ICS_AUTO
  Prior to kernel version 2.1.112, Linux used to automatically use
  DMA for IDE drives and chipsets which support it. Due to concerns
  about a couple of cases where buggy hardware may have caused damage,
  the default is now to NOT use DMA automatically. To revert to the
  previous behaviour, say Y to this question.

  If you suspect your hardware is at all flakey, say N here.
  Do NOT email the IDE kernel people regarding this issue!

CONFIG_BLK_DEV_ATARAID
  Say Y or M if you have an IDE Raid controller and want linux
  to use its softwareraid feature.  You must also select an
  appropriate for your board low-level driver below.

  Note, that Linux does not use the Raid implemetation in BIOS, and
  the main purpose for this feature is to retain compatibility and
  data integrity with other OS-es, using the same disk array. Linux
  has its own Raid drivers, which you should use if you need better
  performance.

CONFIG_BLK_DEV_ATARAID_PDC
  Say Y or M if you have a Promise Fasttrak (tm) Raid controller
  and want linux to use the softwareraid feature of this card.
  This driver uses /dev/ataraid/dXpY (X and Y numbers) as device
  names.

  If you choose to compile this as a module, the module will be called
  pdcraid.o.

CONFIG_BLK_DEV_ATARAID_HPT
  Say Y or M if you have a Highpoint HPT 370 Raid controller
  and want linux to use the softwareraid feature of this card.
  This driver uses /dev/ataraid/dXpY (X and Y numbers) as device
  names.

  If you choose to compile this as a module, the module will be called
  hptraid.o.

CONFIG_BLK_DEV_MPC8xx_IDE
  This option provides support for IDE on Motorola MPC8xx Systems.
  Please see 'Type of MPC8xx IDE interface' for details.

  If unsure, say N.

CONFIG_IDE_8xx_PCCARD
  Select how the IDE devices are connected to the MPC8xx system:

  8xx_PCCARD uses the 8xx internal PCMCIA interface in combination
             with a PC Card (e.g. ARGOSY portable Hard Disk Adapter),
             ATA PC Card HDDs or ATA PC Flash Cards (example: TQM8xxL
             systems)

  8xx_DIRECT is used for directly connected IDE devices using the 8xx
             internal PCMCIA interface (example: IVMS8 systems)

  EXT_DIRECT is used for IDE devices directly connected to the 8xx
             bus using some glue logic, but _not_ the 8xx internal
             PCMCIA interface (example: IDIF860 systems)

CONFIG_BLK_DEV_IDEDISK_FUJITSU
  Enable vendor-specific code for Fujitsu IDE disks.  Unless you are
  the IDE maintainer, you probably do not want to mess with this.

CONFIG_BLK_DEV_IDEDISK_IBM
  Enable vendor-specific code for IBM IDE disks.  Unless you are the
  IDE maintainer, you probably do not want to mess with this.

CONFIG_BLK_DEV_IDEDISK_MAXTOR
  Enable vendor-specific code for Maxtor IDE disks.  Unless you are
  the IDE maintainer, you probably do not want to mess with this.

CONFIG_BLK_DEV_IDEDISK_QUANTUM
  Enable vendor-specific code for Quantum IDE disks.  Unless you are
  the IDE maintainer, you probably do not want to mess with this.

CONFIG_BLK_DEV_IDEDISK_SEAGATE
  Enable vendor-specific code for Seagate IDE disks.  Unless you are
  the IDE maintainer, you probably do not want to mess with this.

CONFIG_BLK_DEV_IDEDISK_WD
  Enable vendor-specific code for Western Digital IDE disks.  Unless
  you are the IDE maintainer, you probably do not want to mess with
  this.

CONFIG_BLK_DEV_TIVO
  Enable vendor-specific code for TiVo IDE disks.  Unless you are the
  IDE maintainer, you probably do not want to mess with this.

CONFIG_IDEDISK_STROKE
  Should you have a system w/ an AWARD Bios and your drives are larger
  than 32GB and it will not boot, one is required to perform a few OEM
  operations first.  The option is called "STROKE" because it allows
  one to "soft clip" the drive to work around a barrier limit.  For
  Maxtor drives it is called "jumpon.exe".  Please search Maxtor's
  web-site for "JUMPON.EXE".  IBM has a similar tool at:
  <http://www.storage.ibm.com/hdd/support/download.htm>.

  If you are unsure, say N here.

CONFIG_IDE_TASK_IOCTL
  This is a direct raw access to the media.  It is a complex but
  elegant solution to test and validate the domain of the hardware and
  perform below the driver data recovery if needed.  This is the most
  basic form of media-forensics.

  If you are unsure, say N here.

CONFIG_BLK_DEV_IDEDMA_FORCED
  This is an old piece of lost code from Linux 2.0 Kernels.

  Generally say N here.

CONFIG_IDEDMA_ONLYDISK
  This is used if you know your ATAPI Devices are going to fail DMA
  Transfers.

  Generally say N here.

CONFIG_BLK_DEV_IT8172
  Say Y here to support the on-board IDE controller on the Integrated
  Technology Express, Inc. ITE8172 SBC.  Vendor page at
  <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
  board at <http://www.mvista.com/allies/semiconductor/ite.html>.

CONFIG_IT8172_TUNING
  Say Y here to support tuning the ITE8172's IDE interface.  This makes
  it possible to set DMA channel or PIO opration and the transfer rate.

CONFIG_IT8172_REVC
  Say Y here to support the older, Revision C version of the Integrated
  Technology Express, Inc. ITE8172 SBC.  Vendor page at
  <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
  board at <http://www.mvista.com/allies/semiconductor/ite.html>.

CONFIG_IT8172_SCR0
  Say Y here to support smart-card reader 0 (SCR0) on the Integrated
  Technology Express, Inc. ITE8172 SBC.  Vendor page at
  <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
  board at <http://www.mvista.com/allies/semiconductor/ite.html>.

CONFIG_IT8172_SCR1
  Say Y here to support smart-card reader 1 (SCR1) on the Integrated
  Technology Express, Inc. ITE8172 SBC.  Vendor page at
  <http://www.ite.com.tw/ia/brief_it8172bsp.htm>; picture of the
  board at <http://www.mvista.com/allies/semiconductor/ite.html>.