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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Block device driver configuration
3#
4
David Howells93614012006-09-30 20:45:40 +02005if BLOCK
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007menu "Block devices"
8
9config BLK_DEV_FD
10 tristate "Normal floppy disk support"
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010011 depends on ARCH_MAY_HAVE_PC_FDC
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 ---help---
13 If you want to use the floppy disk drive(s) of your PC under Linux,
14 say Y. Information about this driver, especially important for IBM
15 Thinkpad users, is contained in <file:Documentation/floppy.txt>.
16 That file also contains the location of the Floppy driver FAQ as
17 well as location of the fdutils package used to configure additional
18 parameters of the driver at run time.
19
20 To compile this driver as a module, choose M here: the
21 module will be called floppy.
22
23config AMIGA_FLOPPY
24 tristate "Amiga floppy support"
25 depends on AMIGA
26
27config ATARI_FLOPPY
28 tristate "Atari floppy support"
29 depends on ATARI
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031config MAC_FLOPPY
32 tristate "Support for PowerMac floppy"
33 depends on PPC_PMAC && !PPC_PMAC64
34 help
35 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
36 floppy controller, say Y here. Most commonly found in PowerMacs.
37
38config BLK_DEV_PS2
39 tristate "PS/2 ESDI hard disk support"
40 depends on MCA && MCA_LEGACY && BROKEN
41 help
42 Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
43 hard disk.
44
45 To compile this driver as a module, choose M here: the
46 module will be called ps2esdi.
47
48config AMIGA_Z2RAM
49 tristate "Amiga Zorro II ramdisk support"
50 depends on ZORRO
51 help
52 This enables support for using Chip RAM and Zorro II RAM as a
53 ramdisk or as a swap partition. Say Y if you want to include this
54 driver in the kernel.
55
56 To compile this driver as a module, choose M here: the
57 module will be called z2ram.
58
59config ATARI_ACSI
60 tristate "Atari ACSI support"
61 depends on ATARI && BROKEN
62 ---help---
63 This enables support for the Atari ACSI interface. The driver
64 supports hard disks and CD-ROMs, which have 512-byte sectors, or can
65 be switched to that mode. Due to the ACSI command format, only disks
66 up to 1 GB are supported. Special support for certain ACSI to SCSI
67 adapters, which could relax that, isn't included yet. The ACSI
68 driver is also the basis for certain other drivers for devices
69 attached to the ACSI bus: Atari SLM laser printer, BioNet-100
70 Ethernet, and PAMsNet Ethernet. If you want to use one of these
71 devices, you need ACSI support, too.
72
73 To compile this driver as a module, choose M here: the
74 module will be called acsi.
75
76comment "Some devices (e.g. CD jukebox) support multiple LUNs"
77 depends on ATARI && ATARI_ACSI
78
79config ACSI_MULTI_LUN
80 bool "Probe all LUNs on each ACSI device"
81 depends on ATARI_ACSI
82 help
83 If you have a ACSI device that supports more than one LUN (Logical
84 Unit Number), e.g. a CD jukebox, you should say Y here so that all
85 will be found by the ACSI driver. An ACSI device with multiple LUNs
86 acts logically like multiple ACSI devices. The vast majority of ACSI
87 devices have only one LUN, and so most people can say N here and
88 should in fact do so, because it is safer.
89
90config ATARI_SLM
91 tristate "Atari SLM laser printer support"
92 depends on ATARI && ATARI_ACSI!=n
93 help
94 If you have an Atari SLM laser printer, say Y to include support for
95 it in the kernel. Otherwise, say N. This driver is also available as
96 a module ( = code which can be inserted in and removed from the
97 running kernel whenever you want). The module will be called
98 acsi_slm. Be warned: the driver needs much ST-RAM and can cause
99 problems due to that fact!
100
101config BLK_DEV_XD
102 tristate "XT hard disk support"
Al Viroa5532602005-05-04 05:39:42 +0100103 depends on ISA && ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 help
105 Very old 8 bit hard disk controllers used in the IBM XT computer
106 will be supported if you say Y here.
107
108 To compile this driver as a module, choose M here: the
109 module will be called xd.
110
111 It's pretty unlikely that you have one of these: say N.
112
113config PARIDE
114 tristate "Parallel port IDE device support"
Marko Kohtala6a19b412006-01-06 00:19:49 -0800115 depends on PARPORT_PC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 ---help---
117 There are many external CD-ROM and disk devices that connect through
118 your computer's parallel port. Most of them are actually IDE devices
119 using a parallel port IDE adapter. This option enables the PARIDE
120 subsystem which contains drivers for many of these external drives.
121 Read <file:Documentation/paride.txt> for more information.
122
123 If you have said Y to the "Parallel-port support" configuration
124 option, you may share a single port between your printer and other
125 parallel port devices. Answer Y to build PARIDE support into your
126 kernel, or M if you would like to build it as a loadable module. If
127 your parallel port support is in a loadable module, you must build
128 PARIDE as a module. If you built PARIDE support into your kernel,
129 you may still build the individual protocol modules and high-level
130 drivers as loadable modules. If you build this support as a module,
131 it will be called paride.
132
133 To use the PARIDE support, you must say Y or M here and also to at
134 least one high-level driver (e.g. "Parallel port IDE disks",
135 "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
136 to at least one protocol driver (e.g. "ATEN EH-100 protocol",
137 "MicroSolutions backpack protocol", "DataStor Commuter protocol"
138 etc.).
139
140source "drivers/block/paride/Kconfig"
141
142config BLK_CPQ_DA
143 tristate "Compaq SMART2 support"
144 depends on PCI
145 help
146 This is the driver for Compaq Smart Array controllers. Everyone
147 using these boards should say Y here. See the file
148 <file:Documentation/cpqarray.txt> for the current list of boards
149 supported by this driver, and for further information on the use of
150 this driver.
151
152config BLK_CPQ_CISS_DA
153 tristate "Compaq Smart Array 5xxx support"
154 depends on PCI
155 help
156 This is the driver for Compaq Smart Array 5xxx controllers.
157 Everyone using these boards should say Y here.
158 See <file:Documentation/cciss.txt> for the current list of
159 boards supported by this driver, and for further information
160 on the use of this driver.
161
162config CISS_SCSI_TAPE
163 bool "SCSI tape drive support for Smart Array 5xxx"
Randy Dunlap3e29fe82006-12-06 20:38:40 -0800164 depends on BLK_CPQ_CISS_DA && PROC_FS
165 depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 help
167 When enabled (Y), this option allows SCSI tape drives and SCSI medium
168 changers (tape robots) to be accessed via a Compaq 5xxx array
169 controller. (See <file:Documentation/cciss.txt> for more details.)
170
171 "SCSI support" and "SCSI tape support" must also be enabled for this
172 option to work.
173
174 When this option is disabled (N), the SCSI portion of the driver
175 is not compiled.
176
177config BLK_DEV_DAC960
178 tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
179 depends on PCI
180 help
181 This driver adds support for the Mylex DAC960, AcceleRAID, and
182 eXtremeRAID PCI RAID controllers. See the file
183 <file:Documentation/README.DAC960> for further information about
184 this driver.
185
186 To compile this driver as a module, choose M here: the
187 module will be called DAC960.
188
189config BLK_DEV_UMEM
190 tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
191 depends on PCI && EXPERIMENTAL
192 ---help---
193 Saying Y here will include support for the MM5415 family of
194 battery backed (Non-volatile) RAM cards.
195 <http://www.umem.com/>
196
197 The cards appear as block devices that can be partitioned into
198 as many as 15 partitions.
199
200 To compile this driver as a module, choose M here: the
201 module will be called umem.
202
203 The umem driver has not yet been allocated a MAJOR number, so
Adrian Bunkbf6ee0a2006-10-03 22:17:48 +0200204 one is chosen dynamically.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206config BLK_DEV_UBD
207 bool "Virtual block device"
208 depends on UML
209 ---help---
210 The User-Mode Linux port includes a driver called UBD which will let
211 you access arbitrary files on the host computer as block devices.
212 Unless you know that you do not need such virtual block devices say
213 Y here.
214
215config BLK_DEV_UBD_SYNC
216 bool "Always do synchronous disk IO for UBD"
217 depends on BLK_DEV_UBD
218 ---help---
219 Writes to the virtual block device are not immediately written to the
220 host's disk; this may cause problems if, for example, the User-Mode
221 Linux 'Virtual Machine' uses a journalling filesystem and the host
222 computer crashes.
223
224 Synchronous operation (i.e. always writing data to the host's disk
225 immediately) is configurable on a per-UBD basis by using a special
226 kernel command line option. Alternatively, you can say Y here to
227 turn on synchronous operation by default for all block devices.
228
229 If you're running a journalling file system (like reiserfs, for
230 example) in your virtual machine, you will want to say Y here. If
231 you care for the safety of the data in your virtual machine, Y is a
232 wise choice too. In all other cases (for example, if you're just
233 playing around with User-Mode Linux) you can choose N.
234
235config BLK_DEV_COW_COMMON
236 bool
237 default BLK_DEV_UBD
238
239config MMAPPER
240 tristate "Example IO memory driver (BROKEN)"
241 depends on UML && BROKEN
242 ---help---
243 The User-Mode Linux port can provide support for IO Memory
244 emulation with this option. This allows a host file to be
245 specified as an I/O region on the kernel command line. That file
246 will be mapped into UML's kernel address space where a driver can
247 locate it and do whatever it wants with the memory, including
248 providing an interface to it for UML processes to use.
249
250 For more information, see
251 <http://user-mode-linux.sourceforge.net/iomem.html>.
252
253 If you'd like to be able to provide a simulated IO port space for
254 User-Mode Linux processes, say Y. If unsure, say N.
255
256config BLK_DEV_LOOP
257 tristate "Loopback device support"
258 ---help---
259 Saying Y here will allow you to use a regular file as a block
260 device; you can then create a file system on that block device and
261 mount it just as you would mount other block devices such as hard
262 drive partitions, CD-ROM drives or floppy drives. The loop devices
263 are block special device files with major number 7 and typically
264 called /dev/loop0, /dev/loop1 etc.
265
266 This is useful if you want to check an ISO 9660 file system before
267 burning the CD, or if you want to use floppy images without first
268 writing them to floppy. Furthermore, some Linux distributions avoid
269 the need for a dedicated Linux partition by keeping their complete
270 root file system inside a DOS FAT file using this loop device
271 driver.
272
273 To use the loop device, you need the losetup utility, found in the
274 util-linux package, see
275 <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
276
277 The loop device driver can also be used to "hide" a file system in
278 a disk partition, floppy, or regular file, either using encryption
279 (scrambling the data) or steganography (hiding the data in the low
280 bits of, say, a sound file). This is also safe if the file resides
281 on a remote file server.
282
283 There are several ways of encrypting disks. Some of these require
284 kernel patches. The vanilla kernel offers the cryptoloop option
285 and a Device Mapper target (which is superior, as it supports all
286 file systems). If you want to use the cryptoloop, say Y to both
287 LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
288 or later) version of util-linux. Additionally, be aware that
289 the cryptoloop is not safe for storing journaled filesystems.
290
291 Note that this loop device has nothing to do with the loopback
292 device used for network connections from the machine to itself.
293
294 To compile this driver as a module, choose M here: the
295 module will be called loop.
296
297 Most users will answer N here.
298
299config BLK_DEV_CRYPTOLOOP
300 tristate "Cryptoloop Support"
301 select CRYPTO
Herbert Xu8df3b0a2006-12-02 14:36:03 +1100302 select CRYPTO_CBC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 depends on BLK_DEV_LOOP
304 ---help---
305 Say Y here if you want to be able to use the ciphers that are
306 provided by the CryptoAPI as loop transformation. This might be
307 used as hard disk encryption.
308
309 WARNING: This device is not safe for journaled file systems like
310 ext3 or Reiserfs. Please use the Device Mapper crypto module
311 instead, which can be configured to be on-disk compatible with the
312 cryptoloop device.
313
314config BLK_DEV_NBD
315 tristate "Network block device support"
316 depends on NET
317 ---help---
318 Saying Y here will allow your computer to be a client for network
319 block devices, i.e. it will be able to use block devices exported by
320 servers (mount file systems on them etc.). Communication between
321 client and server works over TCP/IP networking, but to the client
322 program this is hidden: it looks like a regular local file access to
323 a block device special file such as /dev/nd0.
324
325 Network block devices also allows you to run a block-device in
326 userland (making server and client physically the same computer,
327 communicating using the loopback network device).
328
329 Read <file:Documentation/nbd.txt> for more information, especially
330 about where to find the server code, which runs in user space and
331 does not need special kernel support.
332
333 Note that this has nothing to do with the network file systems NFS
334 or Coda; you can say N here even if you intend to use NFS or Coda.
335
336 To compile this driver as a module, choose M here: the
337 module will be called nbd.
338
339 If unsure, say N.
340
341config BLK_DEV_SX8
342 tristate "Promise SATA SX8 support"
343 depends on PCI
344 ---help---
345 Saying Y or M here will enable support for the
346 Promise SATA SX8 controllers.
347
348 Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
349
350config BLK_DEV_UB
351 tristate "Low Performance USB Block driver"
352 depends on USB
353 help
354 This driver supports certain USB attached storage devices
355 such as flash keys.
356
Pete Zaitceva00828e2005-10-22 20:15:09 -0700357 If you enable this driver, it is recommended to avoid conflicts
358 with usb-storage by enabling USB_LIBUSUAL.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 If unsure, say N.
361
362config BLK_DEV_RAM
363 tristate "RAM disk support"
364 ---help---
365 Saying Y here will allow you to use a portion of your RAM memory as
366 a block device, so that you can make file systems on it, read and
367 write to it and do all the other things that you can do with normal
368 block devices (such as hard drives). It is usually used to load and
369 store a copy of a minimal root file system off of a floppy into RAM
370 during the initial install of Linux.
371
372 Note that the kernel command line option "ramdisk=XX" is now
373 obsolete. For details, read <file:Documentation/ramdisk.txt>.
374
375 To compile this driver as a module, choose M here: the
376 module will be called rd.
377
378 Most normal users won't need the RAM disk functionality, and can
379 thus say N here.
380
381config BLK_DEV_RAM_COUNT
Adrian Bunka687fb12006-03-28 01:56:17 -0800382 int "Default number of RAM disks"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 default "16"
Adrian Bunka687fb12006-03-28 01:56:17 -0800384 depends on BLK_DEV_RAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 help
386 The default value is 16 RAM disks. Change this if you know what
387 are doing. If you boot from a filesystem that needs to be extracted
388 in memory, you will need at least one RAM disk (e.g. root on cramfs).
389
390config BLK_DEV_RAM_SIZE
391 int "Default RAM disk size (kbytes)"
392 depends on BLK_DEV_RAM
393 default "4096"
394 help
395 The default value is 4096 kilobytes. Only change this if you know
396 what are you doing. If you are using IBM S/390, then set this to
397 8192.
398
Nathan Scottbef317e2006-07-14 00:24:10 -0700399config BLK_DEV_RAM_BLOCKSIZE
400 int "Default RAM disk block size (bytes)"
401 depends on BLK_DEV_RAM
402 default "1024"
403 help
Christian Borntraeger73cf9632006-10-03 23:40:34 +0200404 The default value is 1024 bytes. PAGE_SIZE is a much more
Nathan Scottbef317e2006-07-14 00:24:10 -0700405 efficient choice however. The default is kept to ensure initrd
406 setups function - apparently needed by the rd_load_image routine
407 that supposes the filesystem in the image uses a 1024 blocksize.
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409config CDROM_PKTCDVD
410 tristate "Packet writing on CD/DVD media"
411 depends on !UML
412 help
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800413 If you have a CDROM/DVD drive that supports packet writing, say
414 Y to include support. It should work with any MMC/Mt Fuji
415 compliant ATAPI or SCSI drive, which is just about any newer
416 DVD/CD writer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800418 Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs
419 is possible.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 DVD-RW disks must be in restricted overwrite mode.
421
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800422 See the file <file:Documentation/cdrom/packet-writing.txt>
423 for further information on the use of this driver.
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 To compile this driver as a module, choose M here: the
426 module will be called pktcdvd.
427
428config CDROM_PKTCDVD_BUFFERS
429 int "Free buffers for data gathering"
430 depends on CDROM_PKTCDVD
431 default "8"
432 help
433 This controls the maximum number of active concurrent packets. More
434 concurrent packets can increase write performance, but also require
435 more memory. Each concurrent packet will require approximately 64Kb
Peter Osterlunde1bc89b2006-02-04 23:27:47 -0800436 of non-swappable kernel memory, memory which will be allocated when
437 a disc is opened for writing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439config CDROM_PKTCDVD_WCACHE
Adrian Bunkb566cce2006-02-04 23:27:45 -0800440 bool "Enable write caching (EXPERIMENTAL)"
441 depends on CDROM_PKTCDVD && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 help
443 If enabled, write caching will be set for the CD-R/W device. For now
444 this option is dangerous unless the CD-RW media is known good, as we
445 don't do deferred write error handling yet.
446
447source "drivers/s390/block/Kconfig"
448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449config ATA_OVER_ETH
450 tristate "ATA over Ethernet support"
451 depends on NET
452 help
453 This driver provides Support for ATA over Ethernet block
454 devices like the Coraid EtherDrive (R) Storage Blade.
455
456endmenu
David Howells93614012006-09-30 20:45:40 +0200457
458endif