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+#
+# Block device driver configuration
+#
+
+menu "Block devices"
+
+config BLK_DEV_FD
+ tristate "Normal floppy disk support"
+ depends on (!ARCH_S390 && !M68K && !IA64 && !UML) || Q40 || (SUN3X && BROKEN)
+ ---help---
+ If you want to use the floppy disk drive(s) of your PC under Linux,
+ say Y. Information about this driver, especially important for IBM
+ Thinkpad users, is contained in <file:Documentation/floppy.txt>.
+ That file also contains the location of the Floppy driver FAQ as
+ well as location of the fdutils package used to configure additional
+ parameters of the driver at run time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called floppy.
+
+config AMIGA_FLOPPY
+ tristate "Amiga floppy support"
+ depends on AMIGA
+
+config ATARI_FLOPPY
+ tristate "Atari floppy support"
+ depends on ATARI
+
+config BLK_DEV_SWIM_IOP
+ bool "Macintosh IIfx/Quadra 900/Quadra 950 floppy support (EXPERIMENTAL)"
+ depends on MAC && EXPERIMENTAL && BROKEN
+ help
+ Say Y here to support the SWIM (Super Woz Integrated Machine) IOP
+ floppy controller on the Macintosh IIfx and Quadra 900/950.
+
+config MAC_FLOPPY
+ tristate "Support for PowerMac floppy"
+ depends on PPC_PMAC && !PPC_PMAC64
+ help
+ If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
+ floppy controller, say Y here. Most commonly found in PowerMacs.
+
+config BLK_DEV_PS2
+ tristate "PS/2 ESDI hard disk support"
+ depends on MCA && MCA_LEGACY && BROKEN
+ help
+ Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
+ hard disk.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ps2esdi.
+
+config AMIGA_Z2RAM
+ tristate "Amiga Zorro II ramdisk support"
+ depends on ZORRO
+ help
+ This enables support for using Chip RAM and Zorro II RAM as a
+ ramdisk or as a swap partition. Say Y if you want to include this
+ driver in the kernel.
+
+ To compile this driver as a module, choose M here: the
+ module will be called z2ram.
+
+config ATARI_ACSI
+ tristate "Atari ACSI support"
+ depends on ATARI && BROKEN
+ ---help---
+ This enables support for the Atari ACSI interface. The driver
+ supports hard disks and CD-ROMs, which have 512-byte sectors, or can
+ be switched to that mode. Due to the ACSI command format, only disks
+ up to 1 GB are supported. Special support for certain ACSI to SCSI
+ adapters, which could relax that, isn't included yet. The ACSI
+ driver is also the basis for certain other drivers for devices
+ attached to the ACSI bus: Atari SLM laser printer, BioNet-100
+ Ethernet, and PAMsNet Ethernet. If you want to use one of these
+ devices, you need ACSI support, too.
+
+ To compile this driver as a module, choose M here: the
+ module will be called acsi.
+
+comment "Some devices (e.g. CD jukebox) support multiple LUNs"
+ depends on ATARI && ATARI_ACSI
+
+config ACSI_MULTI_LUN
+ bool "Probe all LUNs on each ACSI device"
+ depends on ATARI_ACSI
+ help
+ If you have a ACSI device that supports more than one LUN (Logical
+ Unit Number), e.g. a CD jukebox, you should say Y here so that all
+ will be found by the ACSI driver. An ACSI device with multiple LUNs
+ acts logically like multiple ACSI devices. The vast majority of ACSI
+ devices have only one LUN, and so most people can say N here and
+ should in fact do so, because it is safer.
+
+config ATARI_SLM
+ tristate "Atari SLM laser printer support"
+ depends on ATARI && ATARI_ACSI!=n
+ help
+ If you have an Atari SLM laser printer, say Y to include support for
+ it in the kernel. Otherwise, say N. This driver is also available as
+ a module ( = code which can be inserted in and removed from the
+ running kernel whenever you want). The module will be called
+ acsi_slm. Be warned: the driver needs much ST-RAM and can cause
+ problems due to that fact!
+
+config BLK_DEV_XD
+ tristate "XT hard disk support"
+ depends on ISA
+ help
+ Very old 8 bit hard disk controllers used in the IBM XT computer
+ will be supported if you say Y here.
+
+ To compile this driver as a module, choose M here: the
+ module will be called xd.
+
+ It's pretty unlikely that you have one of these: say N.
+
+config PARIDE
+ tristate "Parallel port IDE device support"
+ depends on PARPORT
+ ---help---
+ There are many external CD-ROM and disk devices that connect through
+ your computer's parallel port. Most of them are actually IDE devices
+ using a parallel port IDE adapter. This option enables the PARIDE
+ subsystem which contains drivers for many of these external drives.
+ Read <file:Documentation/paride.txt> for more information.
+
+ If you have said Y to the "Parallel-port support" configuration
+ option, you may share a single port between your printer and other
+ parallel port devices. Answer Y to build PARIDE support into your
+ kernel, or M if you would like to build it as a loadable module. If
+ your parallel port support is in a loadable module, you must build
+ PARIDE as a module. If you built PARIDE support into your kernel,
+ you may still build the individual protocol modules and high-level
+ drivers as loadable modules. If you build this support as a module,
+ it will be called paride.
+
+ To use the PARIDE support, you must say Y or M here and also to at
+ least one high-level driver (e.g. "Parallel port IDE disks",
+ "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
+ to at least one protocol driver (e.g. "ATEN EH-100 protocol",
+ "MicroSolutions backpack protocol", "DataStor Commuter protocol"
+ etc.).
+
+source "drivers/block/paride/Kconfig"
+
+config BLK_CPQ_DA
+ tristate "Compaq SMART2 support"
+ depends on PCI
+ help
+ This is the driver for Compaq Smart Array controllers. Everyone
+ using these boards should say Y here. See the file
+ <file:Documentation/cpqarray.txt> for the current list of boards
+ supported by this driver, and for further information on the use of
+ this driver.
+
+config BLK_CPQ_CISS_DA
+ tristate "Compaq Smart Array 5xxx support"
+ depends on PCI
+ help
+ This is the driver for Compaq Smart Array 5xxx controllers.
+ Everyone using these boards should say Y here.
+ See <file:Documentation/cciss.txt> for the current list of
+ boards supported by this driver, and for further information
+ on the use of this driver.
+
+config CISS_SCSI_TAPE
+ bool "SCSI tape drive support for Smart Array 5xxx"
+ depends on BLK_CPQ_CISS_DA && SCSI && PROC_FS
+ help
+ When enabled (Y), this option allows SCSI tape drives and SCSI medium
+ changers (tape robots) to be accessed via a Compaq 5xxx array
+ controller. (See <file:Documentation/cciss.txt> for more details.)
+
+ "SCSI support" and "SCSI tape support" must also be enabled for this
+ option to work.
+
+ When this option is disabled (N), the SCSI portion of the driver
+ is not compiled.
+
+config BLK_DEV_DAC960
+ tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
+ depends on PCI
+ help
+ This driver adds support for the Mylex DAC960, AcceleRAID, and
+ eXtremeRAID PCI RAID controllers. See the file
+ <file:Documentation/README.DAC960> for further information about
+ this driver.
+
+ To compile this driver as a module, choose M here: the
+ module will be called DAC960.
+
+config BLK_DEV_UMEM
+ tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
+ depends on PCI && EXPERIMENTAL
+ ---help---
+ Saying Y here will include support for the MM5415 family of
+ battery backed (Non-volatile) RAM cards.
+ <http://www.umem.com/>
+
+ The cards appear as block devices that can be partitioned into
+ as many as 15 partitions.
+
+ To compile this driver as a module, choose M here: the
+ module will be called umem.
+
+ The umem driver has not yet been allocated a MAJOR number, so
+ one is chosen dynamically. Use "devfs" or look in /proc/devices
+ for the device number
+
+config BLK_DEV_UBD
+ bool "Virtual block device"
+ depends on UML
+ ---help---
+ The User-Mode Linux port includes a driver called UBD which will let
+ you access arbitrary files on the host computer as block devices.
+ Unless you know that you do not need such virtual block devices say
+ Y here.
+
+config BLK_DEV_UBD_SYNC
+ bool "Always do synchronous disk IO for UBD"
+ depends on BLK_DEV_UBD
+ ---help---
+ Writes to the virtual block device are not immediately written to the
+ host's disk; this may cause problems if, for example, the User-Mode
+ Linux 'Virtual Machine' uses a journalling filesystem and the host
+ computer crashes.
+
+ Synchronous operation (i.e. always writing data to the host's disk
+ immediately) is configurable on a per-UBD basis by using a special
+ kernel command line option. Alternatively, you can say Y here to
+ turn on synchronous operation by default for all block devices.
+
+ If you're running a journalling file system (like reiserfs, for
+ example) in your virtual machine, you will want to say Y here. If
+ you care for the safety of the data in your virtual machine, Y is a
+ wise choice too. In all other cases (for example, if you're just
+ playing around with User-Mode Linux) you can choose N.
+
+config BLK_DEV_COW_COMMON
+ bool
+ default BLK_DEV_UBD
+
+config MMAPPER
+ tristate "Example IO memory driver (BROKEN)"
+ depends on UML && BROKEN
+ ---help---
+ The User-Mode Linux port can provide support for IO Memory
+ emulation with this option. This allows a host file to be
+ specified as an I/O region on the kernel command line. That file
+ will be mapped into UML's kernel address space where a driver can
+ locate it and do whatever it wants with the memory, including
+ providing an interface to it for UML processes to use.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/iomem.html>.
+
+ If you'd like to be able to provide a simulated IO port space for
+ User-Mode Linux processes, say Y. If unsure, say N.
+
+config BLK_DEV_LOOP
+ tristate "Loopback device support"
+ ---help---
+ Saying Y here will allow you to use a regular file as a block
+ device; you can then create a file system on that block device and
+ mount it just as you would mount other block devices such as hard
+ drive partitions, CD-ROM drives or floppy drives. The loop devices
+ are block special device files with major number 7 and typically
+ called /dev/loop0, /dev/loop1 etc.
+
+ This is useful if you want to check an ISO 9660 file system before
+ burning the CD, or if you want to use floppy images without first
+ writing them to floppy. Furthermore, some Linux distributions avoid
+ the need for a dedicated Linux partition by keeping their complete
+ root file system inside a DOS FAT file using this loop device
+ driver.
+
+ To use the loop device, you need the losetup utility, found in the
+ util-linux package, see
+ <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
+
+ The loop device driver can also be used to "hide" a file system in
+ a disk partition, floppy, or regular file, either using encryption
+ (scrambling the data) or steganography (hiding the data in the low
+ bits of, say, a sound file). This is also safe if the file resides
+ on a remote file server.
+
+ There are several ways of encrypting disks. Some of these require
+ kernel patches. The vanilla kernel offers the cryptoloop option
+ and a Device Mapper target (which is superior, as it supports all
+ file systems). If you want to use the cryptoloop, say Y to both
+ LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
+ or later) version of util-linux. Additionally, be aware that
+ the cryptoloop is not safe for storing journaled filesystems.
+
+ Note that this loop device has nothing to do with the loopback
+ device used for network connections from the machine to itself.
+
+ To compile this driver as a module, choose M here: the
+ module will be called loop.
+
+ Most users will answer N here.
+
+config BLK_DEV_CRYPTOLOOP
+ tristate "Cryptoloop Support"
+ select CRYPTO
+ depends on BLK_DEV_LOOP
+ ---help---
+ Say Y here if you want to be able to use the ciphers that are
+ provided by the CryptoAPI as loop transformation. This might be
+ used as hard disk encryption.
+
+ WARNING: This device is not safe for journaled file systems like
+ ext3 or Reiserfs. Please use the Device Mapper crypto module
+ instead, which can be configured to be on-disk compatible with the
+ cryptoloop device.
+
+config BLK_DEV_NBD
+ tristate "Network block device support"
+ depends on NET
+ ---help---
+ Saying Y here will allow your computer to be a client for network
+ block devices, i.e. it will be able to use block devices exported by
+ servers (mount file systems on them etc.). Communication between
+ client and server works over TCP/IP networking, but to the client
+ program this is hidden: it looks like a regular local file access to
+ a block device special file such as /dev/nd0.
+
+ Network block devices also allows you to run a block-device in
+ userland (making server and client physically the same computer,
+ communicating using the loopback network device).
+
+ Read <file:Documentation/nbd.txt> for more information, especially
+ about where to find the server code, which runs in user space and
+ does not need special kernel support.
+
+ Note that this has nothing to do with the network file systems NFS
+ or Coda; you can say N here even if you intend to use NFS or Coda.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nbd.
+
+ If unsure, say N.
+
+config BLK_DEV_SX8
+ tristate "Promise SATA SX8 support"
+ depends on PCI
+ ---help---
+ Saying Y or M here will enable support for the
+ Promise SATA SX8 controllers.
+
+ Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
+
+config BLK_DEV_UB
+ tristate "Low Performance USB Block driver"
+ depends on USB
+ help
+ This driver supports certain USB attached storage devices
+ such as flash keys.
+
+ Warning: Enabling this cripples the usb-storage driver.
+
+ If unsure, say N.
+
+config BLK_DEV_RAM
+ tristate "RAM disk support"
+ ---help---
+ Saying Y here will allow you to use a portion of your RAM memory as
+ a block device, so that you can make file systems on it, read and
+ write to it and do all the other things that you can do with normal
+ block devices (such as hard drives). It is usually used to load and
+ store a copy of a minimal root file system off of a floppy into RAM
+ during the initial install of Linux.
+
+ Note that the kernel command line option "ramdisk=XX" is now
+ obsolete. For details, read <file:Documentation/ramdisk.txt>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rd.
+
+ Most normal users won't need the RAM disk functionality, and can
+ thus say N here.
+
+config BLK_DEV_RAM_COUNT
+ int "Default number of RAM disks" if BLK_DEV_RAM
+ default "16"
+ help
+ The default value is 16 RAM disks. Change this if you know what
+ are doing. If you boot from a filesystem that needs to be extracted
+ in memory, you will need at least one RAM disk (e.g. root on cramfs).
+
+config BLK_DEV_RAM_SIZE
+ int "Default RAM disk size (kbytes)"
+ depends on BLK_DEV_RAM
+ default "4096"
+ help
+ The default value is 4096 kilobytes. Only change this if you know
+ what are you doing. If you are using IBM S/390, then set this to
+ 8192.
+
+config BLK_DEV_INITRD
+ bool "Initial RAM disk (initrd) support"
+ depends on BLK_DEV_RAM=y
+ help
+ The initial RAM disk is a RAM disk that is loaded by the boot loader
+ (loadlin or lilo) and that is mounted as root before the normal boot
+ procedure. It is typically used to load modules needed to mount the
+ "real" root file system, etc. See <file:Documentation/initrd.txt>
+ for details.
+
+config INITRAMFS_SOURCE
+ string "Initramfs source file(s)"
+ default ""
+ help
+ This can be either a single cpio archive with a .cpio suffix or a
+ space-separated list of directories and files for building the
+ initramfs image. A cpio archive should contain a filesystem archive
+ to be used as an initramfs image. Directories should contain a
+ filesystem layout to be included in the initramfs image. Files
+ should contain entries according to the format described by the
+ "usr/gen_init_cpio" program in the kernel tree.
+
+ When multiple directories and files are specified then the
+ initramfs image will be the aggregate of all of them.
+
+ See <file:Documentation/early-userspace/README for more details.
+
+ If you are not sure, leave it blank.
+
+config INITRAMFS_ROOT_UID
+ int "User ID to map to 0 (user root)"
+ depends on INITRAMFS_SOURCE!=""
+ default "0"
+ help
+ This setting is only meaningful if the INITRAMFS_SOURCE is
+ contains a directory. Setting this user ID (UID) to something
+ other than "0" will cause all files owned by that UID to be
+ owned by user root in the initial ramdisk image.
+
+ If you are not sure, leave it set to "0".
+
+config INITRAMFS_ROOT_GID
+ int "Group ID to map to 0 (group root)"
+ depends on INITRAMFS_SOURCE!=""
+ default "0"
+ help
+ This setting is only meaningful if the INITRAMFS_SOURCE is
+ contains a directory. Setting this group ID (GID) to something
+ other than "0" will cause all files owned by that GID to be
+ owned by group root in the initial ramdisk image.
+
+ If you are not sure, leave it set to "0".
+
+#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
+#for instance.
+config LBD
+ bool "Support for Large Block Devices"
+ depends on X86 || MIPS32 || PPC32 || ARCH_S390_31 || SUPERH || UML
+ help
+ Say Y here if you want to attach large (bigger than 2TB) discs to
+ your machine, or if you want to have a raid or loopback device
+ bigger than 2TB. Otherwise say N.
+
+config CDROM_PKTCDVD
+ tristate "Packet writing on CD/DVD media"
+ depends on !UML
+ help
+ If you have a CDROM drive that supports packet writing, say Y to
+ include preliminary support. It should work with any MMC/Mt Fuji
+ compliant ATAPI or SCSI drive, which is just about any newer CD
+ writer.
+
+ Currently only writing to CD-RW, DVD-RW and DVD+RW discs is possible.
+ DVD-RW disks must be in restricted overwrite mode.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pktcdvd.
+
+config CDROM_PKTCDVD_BUFFERS
+ int "Free buffers for data gathering"
+ depends on CDROM_PKTCDVD
+ default "8"
+ help
+ This controls the maximum number of active concurrent packets. More
+ concurrent packets can increase write performance, but also require
+ more memory. Each concurrent packet will require approximately 64Kb
+ of non-swappable kernel memory, memory which will be allocated at
+ pktsetup time.
+
+config CDROM_PKTCDVD_WCACHE
+ bool "Enable write caching"
+ depends on CDROM_PKTCDVD
+ help
+ If enabled, write caching will be set for the CD-R/W device. For now
+ this option is dangerous unless the CD-RW media is known good, as we
+ don't do deferred write error handling yet.
+
+source "drivers/s390/block/Kconfig"
+
+source "drivers/block/Kconfig.iosched"
+
+config ATA_OVER_ETH
+ tristate "ATA over Ethernet support"
+ depends on NET
+ help
+ This driver provides Support for ATA over Ethernet block
+ devices like the Coraid EtherDrive (R) Storage Blade.
+
+endmenu