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1da177e4 LT |
1 | # |
2 | # Block device driver configuration | |
3 | # | |
4 | ||
fd11d171 JE |
5 | menuconfig BLK_DEV |
6 | bool "Block devices" | |
7 | depends on BLOCK | |
8 | default y | |
06bfb7eb JE |
9 | ---help--- |
10 | Say Y here to get to see options for various different block device | |
11 | drivers. This option alone does not add any kernel code. | |
12 | ||
13 | If you say N, all options in this submenu will be skipped and disabled; | |
14 | only do this if you know what you are doing. | |
9361401e | 15 | |
fd11d171 | 16 | if BLK_DEV |
1da177e4 LT |
17 | |
18 | config BLK_DEV_FD | |
19 | tristate "Normal floppy disk support" | |
a08b6b79 | 20 | depends on ARCH_MAY_HAVE_PC_FDC |
1da177e4 LT |
21 | ---help--- |
22 | If you want to use the floppy disk drive(s) of your PC under Linux, | |
23 | say Y. Information about this driver, especially important for IBM | |
31c00fc1 RD |
24 | Thinkpad users, is contained in |
25 | <file:Documentation/blockdev/floppy.txt>. | |
1da177e4 LT |
26 | That file also contains the location of the Floppy driver FAQ as |
27 | well as location of the fdutils package used to configure additional | |
28 | parameters of the driver at run time. | |
29 | ||
30 | To compile this driver as a module, choose M here: the | |
31 | module will be called floppy. | |
32 | ||
33 | config AMIGA_FLOPPY | |
34 | tristate "Amiga floppy support" | |
35 | depends on AMIGA | |
36 | ||
37 | config ATARI_FLOPPY | |
38 | tristate "Atari floppy support" | |
39 | depends on ATARI | |
40 | ||
1da177e4 LT |
41 | config MAC_FLOPPY |
42 | tristate "Support for PowerMac floppy" | |
43 | depends on PPC_PMAC && !PPC_PMAC64 | |
44 | help | |
45 | If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) | |
46 | floppy controller, say Y here. Most commonly found in PowerMacs. | |
47 | ||
1da177e4 LT |
48 | config 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 | ||
1da177e4 LT |
59 | config BLK_DEV_XD |
60 | tristate "XT hard disk support" | |
a5532606 | 61 | depends on ISA && ISA_DMA_API |
928923c7 | 62 | select CHECK_SIGNATURE |
1da177e4 LT |
63 | help |
64 | Very old 8 bit hard disk controllers used in the IBM XT computer | |
65 | will be supported if you say Y here. | |
66 | ||
67 | To compile this driver as a module, choose M here: the | |
68 | module will be called xd. | |
69 | ||
70 | It's pretty unlikely that you have one of these: say N. | |
71 | ||
72 | config PARIDE | |
73 | tristate "Parallel port IDE device support" | |
6a19b41b | 74 | depends on PARPORT_PC |
1da177e4 LT |
75 | ---help--- |
76 | There are many external CD-ROM and disk devices that connect through | |
77 | your computer's parallel port. Most of them are actually IDE devices | |
78 | using a parallel port IDE adapter. This option enables the PARIDE | |
79 | subsystem which contains drivers for many of these external drives. | |
31c00fc1 | 80 | Read <file:Documentation/blockdev/paride.txt> for more information. |
1da177e4 LT |
81 | |
82 | If you have said Y to the "Parallel-port support" configuration | |
83 | option, you may share a single port between your printer and other | |
84 | parallel port devices. Answer Y to build PARIDE support into your | |
85 | kernel, or M if you would like to build it as a loadable module. If | |
86 | your parallel port support is in a loadable module, you must build | |
87 | PARIDE as a module. If you built PARIDE support into your kernel, | |
88 | you may still build the individual protocol modules and high-level | |
89 | drivers as loadable modules. If you build this support as a module, | |
90 | it will be called paride. | |
91 | ||
92 | To use the PARIDE support, you must say Y or M here and also to at | |
93 | least one high-level driver (e.g. "Parallel port IDE disks", | |
94 | "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and | |
95 | to at least one protocol driver (e.g. "ATEN EH-100 protocol", | |
96 | "MicroSolutions backpack protocol", "DataStor Commuter protocol" | |
97 | etc.). | |
98 | ||
74ee1a75 AM |
99 | config GDROM |
100 | tristate "SEGA Dreamcast GD-ROM drive" | |
101 | depends on SH_DREAMCAST | |
102 | help | |
103 | A standard SEGA Dreamcast comes with a modified CD ROM drive called a | |
104 | "GD-ROM" by SEGA to signify it is capable of reading special disks | |
105 | with up to 1 GB of data. This drive will also read standard CD ROM | |
106 | disks. Select this option to access any disks in your GD ROM drive. | |
107 | Most users will want to say "Y" here. | |
108 | You can also build this as a module which will be called gdrom.ko | |
109 | ||
1da177e4 LT |
110 | source "drivers/block/paride/Kconfig" |
111 | ||
112 | config BLK_CPQ_DA | |
113 | tristate "Compaq SMART2 support" | |
f057eac0 | 114 | depends on PCI && VIRT_TO_BUS |
1da177e4 LT |
115 | help |
116 | This is the driver for Compaq Smart Array controllers. Everyone | |
117 | using these boards should say Y here. See the file | |
31c00fc1 RD |
118 | <file:Documentation/blockdev/cpqarray.txt> for the current list of |
119 | boards supported by this driver, and for further information on the | |
120 | use of this driver. | |
1da177e4 LT |
121 | |
122 | config BLK_CPQ_CISS_DA | |
123 | tristate "Compaq Smart Array 5xxx support" | |
124 | depends on PCI | |
125 | help | |
126 | This is the driver for Compaq Smart Array 5xxx controllers. | |
127 | Everyone using these boards should say Y here. | |
31c00fc1 | 128 | See <file:Documentation/blockdev/cciss.txt> for the current list of |
1da177e4 LT |
129 | boards supported by this driver, and for further information |
130 | on the use of this driver. | |
131 | ||
132 | config CISS_SCSI_TAPE | |
133 | bool "SCSI tape drive support for Smart Array 5xxx" | |
3e29fe83 RD |
134 | depends on BLK_CPQ_CISS_DA && PROC_FS |
135 | depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA | |
1da177e4 LT |
136 | help |
137 | When enabled (Y), this option allows SCSI tape drives and SCSI medium | |
138 | changers (tape robots) to be accessed via a Compaq 5xxx array | |
31c00fc1 | 139 | controller. (See <file:Documentation/blockdev/cciss.txt> for more details.) |
1da177e4 LT |
140 | |
141 | "SCSI support" and "SCSI tape support" must also be enabled for this | |
142 | option to work. | |
143 | ||
144 | When this option is disabled (N), the SCSI portion of the driver | |
145 | is not compiled. | |
146 | ||
147 | config BLK_DEV_DAC960 | |
148 | tristate "Mylex DAC960/DAC1100 PCI RAID Controller support" | |
149 | depends on PCI | |
150 | help | |
151 | This driver adds support for the Mylex DAC960, AcceleRAID, and | |
152 | eXtremeRAID PCI RAID controllers. See the file | |
31c00fc1 RD |
153 | <file:Documentation/blockdev/README.DAC960> for further information |
154 | about this driver. | |
1da177e4 LT |
155 | |
156 | To compile this driver as a module, choose M here: the | |
157 | module will be called DAC960. | |
158 | ||
159 | config BLK_DEV_UMEM | |
160 | tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)" | |
161 | depends on PCI && EXPERIMENTAL | |
162 | ---help--- | |
163 | Saying Y here will include support for the MM5415 family of | |
164 | battery backed (Non-volatile) RAM cards. | |
165 | <http://www.umem.com/> | |
166 | ||
167 | The cards appear as block devices that can be partitioned into | |
168 | as many as 15 partitions. | |
169 | ||
170 | To compile this driver as a module, choose M here: the | |
171 | module will be called umem. | |
172 | ||
173 | The umem driver has not yet been allocated a MAJOR number, so | |
bf6ee0ae | 174 | one is chosen dynamically. |
1da177e4 LT |
175 | |
176 | config BLK_DEV_UBD | |
177 | bool "Virtual block device" | |
178 | depends on UML | |
179 | ---help--- | |
180 | The User-Mode Linux port includes a driver called UBD which will let | |
181 | you access arbitrary files on the host computer as block devices. | |
182 | Unless you know that you do not need such virtual block devices say | |
183 | Y here. | |
184 | ||
185 | config BLK_DEV_UBD_SYNC | |
186 | bool "Always do synchronous disk IO for UBD" | |
187 | depends on BLK_DEV_UBD | |
188 | ---help--- | |
189 | Writes to the virtual block device are not immediately written to the | |
190 | host's disk; this may cause problems if, for example, the User-Mode | |
191 | Linux 'Virtual Machine' uses a journalling filesystem and the host | |
192 | computer crashes. | |
193 | ||
194 | Synchronous operation (i.e. always writing data to the host's disk | |
195 | immediately) is configurable on a per-UBD basis by using a special | |
196 | kernel command line option. Alternatively, you can say Y here to | |
197 | turn on synchronous operation by default for all block devices. | |
198 | ||
199 | If you're running a journalling file system (like reiserfs, for | |
200 | example) in your virtual machine, you will want to say Y here. If | |
201 | you care for the safety of the data in your virtual machine, Y is a | |
202 | wise choice too. In all other cases (for example, if you're just | |
203 | playing around with User-Mode Linux) you can choose N. | |
204 | ||
205 | config BLK_DEV_COW_COMMON | |
206 | bool | |
207 | default BLK_DEV_UBD | |
208 | ||
1da177e4 LT |
209 | config BLK_DEV_LOOP |
210 | tristate "Loopback device support" | |
211 | ---help--- | |
212 | Saying Y here will allow you to use a regular file as a block | |
213 | device; you can then create a file system on that block device and | |
214 | mount it just as you would mount other block devices such as hard | |
215 | drive partitions, CD-ROM drives or floppy drives. The loop devices | |
216 | are block special device files with major number 7 and typically | |
217 | called /dev/loop0, /dev/loop1 etc. | |
218 | ||
219 | This is useful if you want to check an ISO 9660 file system before | |
220 | burning the CD, or if you want to use floppy images without first | |
221 | writing them to floppy. Furthermore, some Linux distributions avoid | |
222 | the need for a dedicated Linux partition by keeping their complete | |
223 | root file system inside a DOS FAT file using this loop device | |
224 | driver. | |
225 | ||
226 | To use the loop device, you need the losetup utility, found in the | |
227 | util-linux package, see | |
228 | <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>. | |
229 | ||
230 | The loop device driver can also be used to "hide" a file system in | |
231 | a disk partition, floppy, or regular file, either using encryption | |
232 | (scrambling the data) or steganography (hiding the data in the low | |
233 | bits of, say, a sound file). This is also safe if the file resides | |
234 | on a remote file server. | |
235 | ||
236 | There are several ways of encrypting disks. Some of these require | |
237 | kernel patches. The vanilla kernel offers the cryptoloop option | |
238 | and a Device Mapper target (which is superior, as it supports all | |
239 | file systems). If you want to use the cryptoloop, say Y to both | |
240 | LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12 | |
241 | or later) version of util-linux. Additionally, be aware that | |
242 | the cryptoloop is not safe for storing journaled filesystems. | |
243 | ||
244 | Note that this loop device has nothing to do with the loopback | |
245 | device used for network connections from the machine to itself. | |
246 | ||
247 | To compile this driver as a module, choose M here: the | |
248 | module will be called loop. | |
249 | ||
250 | Most users will answer N here. | |
251 | ||
252 | config BLK_DEV_CRYPTOLOOP | |
253 | tristate "Cryptoloop Support" | |
254 | select CRYPTO | |
8df3b0a2 | 255 | select CRYPTO_CBC |
1da177e4 LT |
256 | depends on BLK_DEV_LOOP |
257 | ---help--- | |
258 | Say Y here if you want to be able to use the ciphers that are | |
259 | provided by the CryptoAPI as loop transformation. This might be | |
260 | used as hard disk encryption. | |
261 | ||
262 | WARNING: This device is not safe for journaled file systems like | |
263 | ext3 or Reiserfs. Please use the Device Mapper crypto module | |
264 | instead, which can be configured to be on-disk compatible with the | |
265 | cryptoloop device. | |
266 | ||
267 | config BLK_DEV_NBD | |
268 | tristate "Network block device support" | |
269 | depends on NET | |
270 | ---help--- | |
271 | Saying Y here will allow your computer to be a client for network | |
272 | block devices, i.e. it will be able to use block devices exported by | |
273 | servers (mount file systems on them etc.). Communication between | |
274 | client and server works over TCP/IP networking, but to the client | |
275 | program this is hidden: it looks like a regular local file access to | |
276 | a block device special file such as /dev/nd0. | |
277 | ||
278 | Network block devices also allows you to run a block-device in | |
279 | userland (making server and client physically the same computer, | |
280 | communicating using the loopback network device). | |
281 | ||
31c00fc1 RD |
282 | Read <file:Documentation/blockdev/nbd.txt> for more information, |
283 | especially about where to find the server code, which runs in user | |
284 | space and does not need special kernel support. | |
1da177e4 LT |
285 | |
286 | Note that this has nothing to do with the network file systems NFS | |
287 | or Coda; you can say N here even if you intend to use NFS or Coda. | |
288 | ||
289 | To compile this driver as a module, choose M here: the | |
290 | module will be called nbd. | |
291 | ||
292 | If unsure, say N. | |
293 | ||
294 | config BLK_DEV_SX8 | |
295 | tristate "Promise SATA SX8 support" | |
296 | depends on PCI | |
297 | ---help--- | |
298 | Saying Y or M here will enable support for the | |
299 | Promise SATA SX8 controllers. | |
300 | ||
301 | Use devices /dev/sx8/$N and /dev/sx8/$Np$M. | |
302 | ||
303 | config BLK_DEV_UB | |
304 | tristate "Low Performance USB Block driver" | |
305 | depends on USB | |
306 | help | |
307 | This driver supports certain USB attached storage devices | |
308 | such as flash keys. | |
309 | ||
a00828e9 PZ |
310 | If you enable this driver, it is recommended to avoid conflicts |
311 | with usb-storage by enabling USB_LIBUSUAL. | |
1da177e4 LT |
312 | |
313 | If unsure, say N. | |
314 | ||
315 | config BLK_DEV_RAM | |
9db5579b | 316 | tristate "RAM block device support" |
1da177e4 LT |
317 | ---help--- |
318 | Saying Y here will allow you to use a portion of your RAM memory as | |
319 | a block device, so that you can make file systems on it, read and | |
320 | write to it and do all the other things that you can do with normal | |
321 | block devices (such as hard drives). It is usually used to load and | |
322 | store a copy of a minimal root file system off of a floppy into RAM | |
323 | during the initial install of Linux. | |
324 | ||
31c00fc1 RD |
325 | Note that the kernel command line option "ramdisk=XX" is now obsolete. |
326 | For details, read <file:Documentation/blockdev/ramdisk.txt>. | |
1da177e4 LT |
327 | |
328 | To compile this driver as a module, choose M here: the | |
329 | module will be called rd. | |
330 | ||
331 | Most normal users won't need the RAM disk functionality, and can | |
332 | thus say N here. | |
333 | ||
334 | config BLK_DEV_RAM_COUNT | |
a687fb18 | 335 | int "Default number of RAM disks" |
1da177e4 | 336 | default "16" |
a687fb18 | 337 | depends on BLK_DEV_RAM |
1da177e4 | 338 | help |
2e977c85 | 339 | The default value is 16 RAM disks. Change this if you know what you |
1da177e4 LT |
340 | are doing. If you boot from a filesystem that needs to be extracted |
341 | in memory, you will need at least one RAM disk (e.g. root on cramfs). | |
342 | ||
343 | config BLK_DEV_RAM_SIZE | |
344 | int "Default RAM disk size (kbytes)" | |
345 | depends on BLK_DEV_RAM | |
346 | default "4096" | |
347 | help | |
348 | The default value is 4096 kilobytes. Only change this if you know | |
2e977c85 | 349 | what you are doing. |
1da177e4 | 350 | |
75acb9cd NP |
351 | config BLK_DEV_XIP |
352 | bool "Support XIP filesystems on RAM block device" | |
353 | depends on BLK_DEV_RAM | |
354 | default n | |
355 | help | |
356 | Support XIP filesystems (such as ext2 with XIP support on) on | |
357 | top of block ram device. This will slightly enlarge the kernel, and | |
358 | will prevent RAM block device backing store memory from being | |
359 | allocated from highmem (only a problem for highmem systems). | |
360 | ||
1da177e4 LT |
361 | config CDROM_PKTCDVD |
362 | tristate "Packet writing on CD/DVD media" | |
363 | depends on !UML | |
364 | help | |
2d4eeec5 TM |
365 | If you have a CDROM/DVD drive that supports packet writing, say |
366 | Y to include support. It should work with any MMC/Mt Fuji | |
367 | compliant ATAPI or SCSI drive, which is just about any newer | |
368 | DVD/CD writer. | |
1da177e4 | 369 | |
2d4eeec5 TM |
370 | Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs |
371 | is possible. | |
1da177e4 LT |
372 | DVD-RW disks must be in restricted overwrite mode. |
373 | ||
2d4eeec5 TM |
374 | See the file <file:Documentation/cdrom/packet-writing.txt> |
375 | for further information on the use of this driver. | |
376 | ||
1da177e4 LT |
377 | To compile this driver as a module, choose M here: the |
378 | module will be called pktcdvd. | |
379 | ||
380 | config CDROM_PKTCDVD_BUFFERS | |
381 | int "Free buffers for data gathering" | |
382 | depends on CDROM_PKTCDVD | |
383 | default "8" | |
384 | help | |
385 | This controls the maximum number of active concurrent packets. More | |
386 | concurrent packets can increase write performance, but also require | |
387 | more memory. Each concurrent packet will require approximately 64Kb | |
e1bc89bc PO |
388 | of non-swappable kernel memory, memory which will be allocated when |
389 | a disc is opened for writing. | |
1da177e4 LT |
390 | |
391 | config CDROM_PKTCDVD_WCACHE | |
b566ccef AB |
392 | bool "Enable write caching (EXPERIMENTAL)" |
393 | depends on CDROM_PKTCDVD && EXPERIMENTAL | |
1da177e4 LT |
394 | help |
395 | If enabled, write caching will be set for the CD-R/W device. For now | |
396 | this option is dangerous unless the CD-RW media is known good, as we | |
397 | don't do deferred write error handling yet. | |
398 | ||
1da177e4 LT |
399 | config ATA_OVER_ETH |
400 | tristate "ATA over Ethernet support" | |
401 | depends on NET | |
402 | help | |
403 | This driver provides Support for ATA over Ethernet block | |
404 | devices like the Coraid EtherDrive (R) Storage Blade. | |
405 | ||
667ef3c3 DM |
406 | config SUNVDC |
407 | tristate "Sun Virtual Disk Client support" | |
408 | depends on SUN_LDOMS | |
409 | help | |
410 | Support for virtual disk devices as a client under Sun | |
411 | Logical Domains. | |
412 | ||
61d48c2c MS |
413 | source "drivers/s390/block/Kconfig" |
414 | ||
74489a91 GL |
415 | config XILINX_SYSACE |
416 | tristate "Xilinx SystemACE support" | |
417 | depends on 4xx | |
418 | help | |
419 | Include support for the Xilinx SystemACE CompactFlash interface | |
420 | ||
9f27ee59 JF |
421 | config XEN_BLKDEV_FRONTEND |
422 | tristate "Xen virtual block device support" | |
423 | depends on XEN | |
424 | default y | |
425 | help | |
426 | This driver implements the front-end of the Xen virtual | |
427 | block device driver. It communicates with a back-end driver | |
428 | in another domain which drives the actual block device. | |
429 | ||
e467cde2 RR |
430 | config VIRTIO_BLK |
431 | tristate "Virtio block driver (EXPERIMENTAL)" | |
432 | depends on EXPERIMENTAL && VIRTIO | |
433 | ---help--- | |
0ad07ec1 AL |
434 | This is the virtual block driver for virtio. It can be used with |
435 | lguest or QEMU based VMMs (like KVM or Xen). Say Y or M. | |
e467cde2 | 436 | |
453ea3ed | 437 | config BLK_DEV_HD |
f327c1c3 | 438 | bool "Very old hard disk (MFM/RLL/IDE) driver" |
453ea3ed AB |
439 | depends on HAVE_IDE |
440 | depends on !ARM || ARCH_RPC || ARCH_SHARK || BROKEN | |
441 | help | |
f327c1c3 AB |
442 | This is a very old hard disk driver that lacks the enhanced |
443 | functionality of the newer ones. | |
444 | ||
445 | It is required for systems with ancient MFM/RLL/ESDI drives. | |
446 | ||
447 | If unsure, say N. | |
453ea3ed | 448 | |
fd11d171 | 449 | endif # BLK_DEV |