config.help

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CONFIG_I2O
  The Intelligent Input/Output (I2O) architecture allows hardware
  drivers to be split into two parts: an operating system specific
  module called the OSM and an hardware specific module called the
  HDM. The OSM can talk to a whole range of HDM's, and ideally the
  HDM's are not OS dependent. This allows for the same HDM driver to
  be used under different operating systems if the relevant OSM is in
  place. In order for this to work, you need to have an I2O interface
  adapter card in your computer. This card contains a special I/O
  processor (IOP), thus allowing high speeds since the CPU does not
  have to deal with I/O.

  If you say Y here, you will get a choice of interface adapter
  drivers and OSM's with the following questions.

  This support is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you want to compile it as a module, say M here and read
  <file:Documentation/modules.txt>.  You will get modules called
  i2o_core.o and i2o_config.o.

  If unsure, say N.

CONFIG_I2O_PCI
  Say Y for support of PCI bus I2O interface adapters. Currently this
  is the only variety supported, so you should say Y.

  This support is also available as a module called i2o_pci.o ( = code
  which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read <file:Documentation/modules.txt>.

CONFIG_I2O_BLOCK
  Include support for the I2O Block OSM. The Block OSM presents disk
  and other structured block devices to the operating system.

  This support is also available as a module called i2o_block.o ( =
  code which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read <file:Documentation/modules.txt>.

CONFIG_I2O_LAN
  Include support for the LAN OSM. You will also need to include
  support for token ring or FDDI if you wish to use token ring or FDDI
  I2O cards with this driver.

  This support is also available as a module called i2o_lan.o ( = code
  which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read <file:Documentation/modules.txt>.

CONFIG_I2O_SCSI
  Allows direct SCSI access to SCSI devices on a SCSI or FibreChannel
  I2O controller. You can use both the SCSI and Block OSM together if
  you wish.

  This support is also available as a module called i2o_scsi.o ( =
  code which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read <file:Documentation/modules.txt>.

CONFIG_I2O_PROC
  If you say Y here and to "/proc file system support", you will be
  able to read I2O related information from the virtual directory
  /proc/i2o.

  This support is also available as a module called i2o_proc.o ( =
  code which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read <file:Documentation/modules.txt>.