461 lines
17 KiB
Plaintext
461 lines
17 KiB
Plaintext
#
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# Block device driver configuration
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#
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menu "Block devices"
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config BLK_DEV_FD
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tristate "Normal floppy disk support"
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depends on ARCH_MAY_HAVE_PC_FDC
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---help---
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If you want to use the floppy disk drive(s) of your PC under Linux,
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say Y. Information about this driver, especially important for IBM
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Thinkpad users, is contained in <file:Documentation/floppy.txt>.
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That file also contains the location of the Floppy driver FAQ as
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well as location of the fdutils package used to configure additional
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parameters of the driver at run time.
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To compile this driver as a module, choose M here: the
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module will be called floppy.
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config AMIGA_FLOPPY
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tristate "Amiga floppy support"
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depends on AMIGA
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config ATARI_FLOPPY
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tristate "Atari floppy support"
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depends on ATARI
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config BLK_DEV_SWIM_IOP
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bool "Macintosh IIfx/Quadra 900/Quadra 950 floppy support (EXPERIMENTAL)"
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depends on MAC && EXPERIMENTAL && BROKEN
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help
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Say Y here to support the SWIM (Super Woz Integrated Machine) IOP
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floppy controller on the Macintosh IIfx and Quadra 900/950.
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config MAC_FLOPPY
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tristate "Support for PowerMac floppy"
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depends on PPC_PMAC && !PPC_PMAC64
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help
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If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
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floppy controller, say Y here. Most commonly found in PowerMacs.
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config BLK_DEV_PS2
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tristate "PS/2 ESDI hard disk support"
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depends on MCA && MCA_LEGACY && BROKEN
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help
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Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
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hard disk.
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To compile this driver as a module, choose M here: the
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module will be called ps2esdi.
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config AMIGA_Z2RAM
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tristate "Amiga Zorro II ramdisk support"
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depends on ZORRO
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help
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This enables support for using Chip RAM and Zorro II RAM as a
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ramdisk or as a swap partition. Say Y if you want to include this
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driver in the kernel.
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To compile this driver as a module, choose M here: the
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module will be called z2ram.
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config ATARI_ACSI
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tristate "Atari ACSI support"
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depends on ATARI && BROKEN
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---help---
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This enables support for the Atari ACSI interface. The driver
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supports hard disks and CD-ROMs, which have 512-byte sectors, or can
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be switched to that mode. Due to the ACSI command format, only disks
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up to 1 GB are supported. Special support for certain ACSI to SCSI
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adapters, which could relax that, isn't included yet. The ACSI
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driver is also the basis for certain other drivers for devices
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attached to the ACSI bus: Atari SLM laser printer, BioNet-100
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Ethernet, and PAMsNet Ethernet. If you want to use one of these
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devices, you need ACSI support, too.
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To compile this driver as a module, choose M here: the
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module will be called acsi.
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comment "Some devices (e.g. CD jukebox) support multiple LUNs"
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depends on ATARI && ATARI_ACSI
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config ACSI_MULTI_LUN
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bool "Probe all LUNs on each ACSI device"
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depends on ATARI_ACSI
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help
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If you have a ACSI device that supports more than one LUN (Logical
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Unit Number), e.g. a CD jukebox, you should say Y here so that all
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will be found by the ACSI driver. An ACSI device with multiple LUNs
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acts logically like multiple ACSI devices. The vast majority of ACSI
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devices have only one LUN, and so most people can say N here and
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should in fact do so, because it is safer.
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config ATARI_SLM
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tristate "Atari SLM laser printer support"
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depends on ATARI && ATARI_ACSI!=n
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help
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If you have an Atari SLM laser printer, say Y to include support for
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it in the kernel. Otherwise, say N. This driver is also available as
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a module ( = code which can be inserted in and removed from the
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running kernel whenever you want). The module will be called
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acsi_slm. Be warned: the driver needs much ST-RAM and can cause
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problems due to that fact!
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config BLK_DEV_XD
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tristate "XT hard disk support"
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depends on ISA && ISA_DMA_API
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help
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Very old 8 bit hard disk controllers used in the IBM XT computer
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will be supported if you say Y here.
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To compile this driver as a module, choose M here: the
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module will be called xd.
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It's pretty unlikely that you have one of these: say N.
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config PARIDE
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tristate "Parallel port IDE device support"
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depends on PARPORT_PC
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---help---
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There are many external CD-ROM and disk devices that connect through
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your computer's parallel port. Most of them are actually IDE devices
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using a parallel port IDE adapter. This option enables the PARIDE
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subsystem which contains drivers for many of these external drives.
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Read <file:Documentation/paride.txt> for more information.
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If you have said Y to the "Parallel-port support" configuration
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option, you may share a single port between your printer and other
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parallel port devices. Answer Y to build PARIDE support into your
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kernel, or M if you would like to build it as a loadable module. If
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your parallel port support is in a loadable module, you must build
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PARIDE as a module. If you built PARIDE support into your kernel,
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you may still build the individual protocol modules and high-level
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drivers as loadable modules. If you build this support as a module,
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it will be called paride.
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To use the PARIDE support, you must say Y or M here and also to at
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least one high-level driver (e.g. "Parallel port IDE disks",
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"Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
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to at least one protocol driver (e.g. "ATEN EH-100 protocol",
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"MicroSolutions backpack protocol", "DataStor Commuter protocol"
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etc.).
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source "drivers/block/paride/Kconfig"
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config BLK_CPQ_DA
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tristate "Compaq SMART2 support"
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depends on PCI
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help
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This is the driver for Compaq Smart Array controllers. Everyone
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using these boards should say Y here. See the file
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<file:Documentation/cpqarray.txt> for the current list of boards
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supported by this driver, and for further information on the use of
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this driver.
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config BLK_CPQ_CISS_DA
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tristate "Compaq Smart Array 5xxx support"
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depends on PCI
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help
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This is the driver for Compaq Smart Array 5xxx controllers.
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Everyone using these boards should say Y here.
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See <file:Documentation/cciss.txt> for the current list of
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boards supported by this driver, and for further information
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on the use of this driver.
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config CISS_SCSI_TAPE
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bool "SCSI tape drive support for Smart Array 5xxx"
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depends on BLK_CPQ_CISS_DA && SCSI && PROC_FS
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help
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When enabled (Y), this option allows SCSI tape drives and SCSI medium
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changers (tape robots) to be accessed via a Compaq 5xxx array
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controller. (See <file:Documentation/cciss.txt> for more details.)
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"SCSI support" and "SCSI tape support" must also be enabled for this
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option to work.
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When this option is disabled (N), the SCSI portion of the driver
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is not compiled.
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config BLK_DEV_DAC960
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tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
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depends on PCI
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help
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This driver adds support for the Mylex DAC960, AcceleRAID, and
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eXtremeRAID PCI RAID controllers. See the file
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<file:Documentation/README.DAC960> for further information about
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this driver.
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To compile this driver as a module, choose M here: the
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module will be called DAC960.
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config BLK_DEV_UMEM
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tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
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depends on PCI && EXPERIMENTAL
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---help---
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Saying Y here will include support for the MM5415 family of
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battery backed (Non-volatile) RAM cards.
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<http://www.umem.com/>
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The cards appear as block devices that can be partitioned into
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as many as 15 partitions.
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To compile this driver as a module, choose M here: the
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module will be called umem.
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The umem driver has not yet been allocated a MAJOR number, so
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one is chosen dynamically. Use "devfs" or look in /proc/devices
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for the device number
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config BLK_DEV_UBD
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bool "Virtual block device"
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depends on UML
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---help---
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The User-Mode Linux port includes a driver called UBD which will let
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you access arbitrary files on the host computer as block devices.
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Unless you know that you do not need such virtual block devices say
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Y here.
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config BLK_DEV_UBD_SYNC
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bool "Always do synchronous disk IO for UBD"
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depends on BLK_DEV_UBD
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---help---
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Writes to the virtual block device are not immediately written to the
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host's disk; this may cause problems if, for example, the User-Mode
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Linux 'Virtual Machine' uses a journalling filesystem and the host
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computer crashes.
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Synchronous operation (i.e. always writing data to the host's disk
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immediately) is configurable on a per-UBD basis by using a special
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kernel command line option. Alternatively, you can say Y here to
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turn on synchronous operation by default for all block devices.
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If you're running a journalling file system (like reiserfs, for
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example) in your virtual machine, you will want to say Y here. If
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you care for the safety of the data in your virtual machine, Y is a
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wise choice too. In all other cases (for example, if you're just
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playing around with User-Mode Linux) you can choose N.
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config BLK_DEV_COW_COMMON
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bool
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default BLK_DEV_UBD
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config MMAPPER
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tristate "Example IO memory driver (BROKEN)"
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depends on UML && BROKEN
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---help---
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The User-Mode Linux port can provide support for IO Memory
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emulation with this option. This allows a host file to be
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specified as an I/O region on the kernel command line. That file
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will be mapped into UML's kernel address space where a driver can
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locate it and do whatever it wants with the memory, including
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providing an interface to it for UML processes to use.
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For more information, see
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<http://user-mode-linux.sourceforge.net/iomem.html>.
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If you'd like to be able to provide a simulated IO port space for
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User-Mode Linux processes, say Y. If unsure, say N.
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config BLK_DEV_LOOP
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tristate "Loopback device support"
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---help---
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Saying Y here will allow you to use a regular file as a block
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device; you can then create a file system on that block device and
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mount it just as you would mount other block devices such as hard
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drive partitions, CD-ROM drives or floppy drives. The loop devices
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are block special device files with major number 7 and typically
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called /dev/loop0, /dev/loop1 etc.
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This is useful if you want to check an ISO 9660 file system before
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burning the CD, or if you want to use floppy images without first
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writing them to floppy. Furthermore, some Linux distributions avoid
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the need for a dedicated Linux partition by keeping their complete
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root file system inside a DOS FAT file using this loop device
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driver.
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To use the loop device, you need the losetup utility, found in the
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util-linux package, see
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<ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
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The loop device driver can also be used to "hide" a file system in
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a disk partition, floppy, or regular file, either using encryption
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(scrambling the data) or steganography (hiding the data in the low
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bits of, say, a sound file). This is also safe if the file resides
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on a remote file server.
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There are several ways of encrypting disks. Some of these require
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kernel patches. The vanilla kernel offers the cryptoloop option
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and a Device Mapper target (which is superior, as it supports all
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file systems). If you want to use the cryptoloop, say Y to both
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LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
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or later) version of util-linux. Additionally, be aware that
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the cryptoloop is not safe for storing journaled filesystems.
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Note that this loop device has nothing to do with the loopback
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device used for network connections from the machine to itself.
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To compile this driver as a module, choose M here: the
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module will be called loop.
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Most users will answer N here.
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config BLK_DEV_CRYPTOLOOP
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tristate "Cryptoloop Support"
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select CRYPTO
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depends on BLK_DEV_LOOP
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---help---
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Say Y here if you want to be able to use the ciphers that are
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provided by the CryptoAPI as loop transformation. This might be
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used as hard disk encryption.
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WARNING: This device is not safe for journaled file systems like
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ext3 or Reiserfs. Please use the Device Mapper crypto module
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instead, which can be configured to be on-disk compatible with the
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cryptoloop device.
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config BLK_DEV_NBD
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tristate "Network block device support"
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depends on NET
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---help---
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Saying Y here will allow your computer to be a client for network
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block devices, i.e. it will be able to use block devices exported by
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servers (mount file systems on them etc.). Communication between
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client and server works over TCP/IP networking, but to the client
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program this is hidden: it looks like a regular local file access to
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a block device special file such as /dev/nd0.
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Network block devices also allows you to run a block-device in
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userland (making server and client physically the same computer,
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communicating using the loopback network device).
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Read <file:Documentation/nbd.txt> for more information, especially
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about where to find the server code, which runs in user space and
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does not need special kernel support.
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Note that this has nothing to do with the network file systems NFS
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or Coda; you can say N here even if you intend to use NFS or Coda.
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To compile this driver as a module, choose M here: the
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module will be called nbd.
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If unsure, say N.
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config BLK_DEV_SX8
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tristate "Promise SATA SX8 support"
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depends on PCI
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---help---
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Saying Y or M here will enable support for the
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Promise SATA SX8 controllers.
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Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
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config BLK_DEV_UB
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tristate "Low Performance USB Block driver"
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depends on USB
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help
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This driver supports certain USB attached storage devices
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such as flash keys.
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If you enable this driver, it is recommended to avoid conflicts
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with usb-storage by enabling USB_LIBUSUAL.
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If unsure, say N.
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config BLK_DEV_RAM
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tristate "RAM disk support"
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---help---
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Saying Y here will allow you to use a portion of your RAM memory as
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a block device, so that you can make file systems on it, read and
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write to it and do all the other things that you can do with normal
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block devices (such as hard drives). It is usually used to load and
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store a copy of a minimal root file system off of a floppy into RAM
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during the initial install of Linux.
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Note that the kernel command line option "ramdisk=XX" is now
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obsolete. For details, read <file:Documentation/ramdisk.txt>.
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To compile this driver as a module, choose M here: the
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module will be called rd.
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Most normal users won't need the RAM disk functionality, and can
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thus say N here.
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config BLK_DEV_RAM_COUNT
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int "Default number of RAM disks"
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default "16"
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depends on BLK_DEV_RAM
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help
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The default value is 16 RAM disks. Change this if you know what
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are doing. If you boot from a filesystem that needs to be extracted
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in memory, you will need at least one RAM disk (e.g. root on cramfs).
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config BLK_DEV_RAM_SIZE
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int "Default RAM disk size (kbytes)"
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depends on BLK_DEV_RAM
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default "4096"
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help
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The default value is 4096 kilobytes. Only change this if you know
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what are you doing. If you are using IBM S/390, then set this to
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8192.
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config BLK_DEV_INITRD
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bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
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depends on BROKEN || !FRV
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help
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The initial RAM filesystem is a ramfs which is loaded by the
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boot loader (loadlin or lilo) and that is mounted as root
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before the normal boot procedure. It is typically used to
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load modules needed to mount the "real" root file system,
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etc. See <file:Documentation/initrd.txt> for details.
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If RAM disk support (BLK_DEV_RAM) is also included, this
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also enables initial RAM disk (initrd) support.
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config CDROM_PKTCDVD
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tristate "Packet writing on CD/DVD media"
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depends on !UML
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help
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If you have a CDROM drive that supports packet writing, say Y to
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include preliminary support. It should work with any MMC/Mt Fuji
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compliant ATAPI or SCSI drive, which is just about any newer CD
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writer.
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Currently only writing to CD-RW, DVD-RW and DVD+RW discs is possible.
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DVD-RW disks must be in restricted overwrite mode.
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To compile this driver as a module, choose M here: the
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module will be called pktcdvd.
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config CDROM_PKTCDVD_BUFFERS
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int "Free buffers for data gathering"
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depends on CDROM_PKTCDVD
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default "8"
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help
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This controls the maximum number of active concurrent packets. More
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concurrent packets can increase write performance, but also require
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more memory. Each concurrent packet will require approximately 64Kb
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of non-swappable kernel memory, memory which will be allocated when
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a disc is opened for writing.
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config CDROM_PKTCDVD_WCACHE
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bool "Enable write caching (EXPERIMENTAL)"
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depends on CDROM_PKTCDVD && EXPERIMENTAL
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help
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If enabled, write caching will be set for the CD-R/W device. For now
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this option is dangerous unless the CD-RW media is known good, as we
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don't do deferred write error handling yet.
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source "drivers/s390/block/Kconfig"
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config ATA_OVER_ETH
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tristate "ATA over Ethernet support"
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depends on NET
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help
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This driver provides Support for ATA over Ethernet block
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devices like the Coraid EtherDrive (R) Storage Blade.
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endmenu
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