1# 2# Block device driver configuration 3# 4 5menuconfig BLK_DEV 6 bool "Block devices" 7 depends on BLOCK 8 default y 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. 15 16if BLK_DEV 17 18config BLK_DEV_FD 19 tristate "Normal floppy disk support" 20 depends on ARCH_MAY_HAVE_PC_FDC 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 24 Thinkpad users, is contained in <file:Documentation/floppy.txt>. 25 That file also contains the location of the Floppy driver FAQ as 26 well as location of the fdutils package used to configure additional 27 parameters of the driver at run time. 28 29 To compile this driver as a module, choose M here: the 30 module will be called floppy. 31 32config AMIGA_FLOPPY 33 tristate "Amiga floppy support" 34 depends on AMIGA 35 36config ATARI_FLOPPY 37 tristate "Atari floppy support" 38 depends on ATARI 39 40config MAC_FLOPPY 41 tristate "Support for PowerMac floppy" 42 depends on PPC_PMAC && !PPC_PMAC64 43 help 44 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) 45 floppy controller, say Y here. Most commonly found in PowerMacs. 46 47config BLK_DEV_PS2 48 tristate "PS/2 ESDI hard disk support" 49 depends on MCA && MCA_LEGACY && BROKEN 50 help 51 Say Y here if you have a PS/2 machine with a MCA bus and an ESDI 52 hard disk. 53 54 To compile this driver as a module, choose M here: the 55 module will be called ps2esdi. 56 57config AMIGA_Z2RAM 58 tristate "Amiga Zorro II ramdisk support" 59 depends on ZORRO 60 help 61 This enables support for using Chip RAM and Zorro II RAM as a 62 ramdisk or as a swap partition. Say Y if you want to include this 63 driver in the kernel. 64 65 To compile this driver as a module, choose M here: the 66 module will be called z2ram. 67 68config BLK_DEV_XD 69 tristate "XT hard disk support" 70 depends on ISA && ISA_DMA_API 71 select CHECK_SIGNATURE 72 help 73 Very old 8 bit hard disk controllers used in the IBM XT computer 74 will be supported if you say Y here. 75 76 To compile this driver as a module, choose M here: the 77 module will be called xd. 78 79 It's pretty unlikely that you have one of these: say N. 80 81config PARIDE 82 tristate "Parallel port IDE device support" 83 depends on PARPORT_PC 84 ---help--- 85 There are many external CD-ROM and disk devices that connect through 86 your computer's parallel port. Most of them are actually IDE devices 87 using a parallel port IDE adapter. This option enables the PARIDE 88 subsystem which contains drivers for many of these external drives. 89 Read <file:Documentation/paride.txt> for more information. 90 91 If you have said Y to the "Parallel-port support" configuration 92 option, you may share a single port between your printer and other 93 parallel port devices. Answer Y to build PARIDE support into your 94 kernel, or M if you would like to build it as a loadable module. If 95 your parallel port support is in a loadable module, you must build 96 PARIDE as a module. If you built PARIDE support into your kernel, 97 you may still build the individual protocol modules and high-level 98 drivers as loadable modules. If you build this support as a module, 99 it will be called paride. 100 101 To use the PARIDE support, you must say Y or M here and also to at 102 least one high-level driver (e.g. "Parallel port IDE disks", 103 "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and 104 to at least one protocol driver (e.g. "ATEN EH-100 protocol", 105 "MicroSolutions backpack protocol", "DataStor Commuter protocol" 106 etc.). 107 108source "drivers/block/paride/Kconfig" 109 110config BLK_CPQ_DA 111 tristate "Compaq SMART2 support" 112 depends on PCI && VIRT_TO_BUS 113 help 114 This is the driver for Compaq Smart Array controllers. Everyone 115 using these boards should say Y here. See the file 116 <file:Documentation/cpqarray.txt> for the current list of boards 117 supported by this driver, and for further information on the use of 118 this driver. 119 120config BLK_CPQ_CISS_DA 121 tristate "Compaq Smart Array 5xxx support" 122 depends on PCI 123 help 124 This is the driver for Compaq Smart Array 5xxx controllers. 125 Everyone using these boards should say Y here. 126 See <file:Documentation/cciss.txt> for the current list of 127 boards supported by this driver, and for further information 128 on the use of this driver. 129 130config CISS_SCSI_TAPE 131 bool "SCSI tape drive support for Smart Array 5xxx" 132 depends on BLK_CPQ_CISS_DA && PROC_FS 133 depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA 134 help 135 When enabled (Y), this option allows SCSI tape drives and SCSI medium 136 changers (tape robots) to be accessed via a Compaq 5xxx array 137 controller. (See <file:Documentation/cciss.txt> for more details.) 138 139 "SCSI support" and "SCSI tape support" must also be enabled for this 140 option to work. 141 142 When this option is disabled (N), the SCSI portion of the driver 143 is not compiled. 144 145config BLK_DEV_DAC960 146 tristate "Mylex DAC960/DAC1100 PCI RAID Controller support" 147 depends on PCI 148 help 149 This driver adds support for the Mylex DAC960, AcceleRAID, and 150 eXtremeRAID PCI RAID controllers. See the file 151 <file:Documentation/README.DAC960> for further information about 152 this driver. 153 154 To compile this driver as a module, choose M here: the 155 module will be called DAC960. 156 157config BLK_DEV_UMEM 158 tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)" 159 depends on PCI && EXPERIMENTAL 160 ---help--- 161 Saying Y here will include support for the MM5415 family of 162 battery backed (Non-volatile) RAM cards. 163 <http://www.umem.com/> 164 165 The cards appear as block devices that can be partitioned into 166 as many as 15 partitions. 167 168 To compile this driver as a module, choose M here: the 169 module will be called umem. 170 171 The umem driver has not yet been allocated a MAJOR number, so 172 one is chosen dynamically. 173 174config BLK_DEV_UBD 175 bool "Virtual block device" 176 depends on UML 177 ---help--- 178 The User-Mode Linux port includes a driver called UBD which will let 179 you access arbitrary files on the host computer as block devices. 180 Unless you know that you do not need such virtual block devices say 181 Y here. 182 183config BLK_DEV_UBD_SYNC 184 bool "Always do synchronous disk IO for UBD" 185 depends on BLK_DEV_UBD 186 ---help--- 187 Writes to the virtual block device are not immediately written to the 188 host's disk; this may cause problems if, for example, the User-Mode 189 Linux 'Virtual Machine' uses a journalling filesystem and the host 190 computer crashes. 191 192 Synchronous operation (i.e. always writing data to the host's disk 193 immediately) is configurable on a per-UBD basis by using a special 194 kernel command line option. Alternatively, you can say Y here to 195 turn on synchronous operation by default for all block devices. 196 197 If you're running a journalling file system (like reiserfs, for 198 example) in your virtual machine, you will want to say Y here. If 199 you care for the safety of the data in your virtual machine, Y is a 200 wise choice too. In all other cases (for example, if you're just 201 playing around with User-Mode Linux) you can choose N. 202 203config BLK_DEV_COW_COMMON 204 bool 205 default BLK_DEV_UBD 206 207config BLK_DEV_LOOP 208 tristate "Loopback device support" 209 ---help--- 210 Saying Y here will allow you to use a regular file as a block 211 device; you can then create a file system on that block device and 212 mount it just as you would mount other block devices such as hard 213 drive partitions, CD-ROM drives or floppy drives. The loop devices 214 are block special device files with major number 7 and typically 215 called /dev/loop0, /dev/loop1 etc. 216 217 This is useful if you want to check an ISO 9660 file system before 218 burning the CD, or if you want to use floppy images without first 219 writing them to floppy. Furthermore, some Linux distributions avoid 220 the need for a dedicated Linux partition by keeping their complete 221 root file system inside a DOS FAT file using this loop device 222 driver. 223 224 To use the loop device, you need the losetup utility, found in the 225 util-linux package, see 226 <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>. 227 228 The loop device driver can also be used to "hide" a file system in 229 a disk partition, floppy, or regular file, either using encryption 230 (scrambling the data) or steganography (hiding the data in the low 231 bits of, say, a sound file). This is also safe if the file resides 232 on a remote file server. 233 234 There are several ways of encrypting disks. Some of these require 235 kernel patches. The vanilla kernel offers the cryptoloop option 236 and a Device Mapper target (which is superior, as it supports all 237 file systems). If you want to use the cryptoloop, say Y to both 238 LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12 239 or later) version of util-linux. Additionally, be aware that 240 the cryptoloop is not safe for storing journaled filesystems. 241 242 Note that this loop device has nothing to do with the loopback 243 device used for network connections from the machine to itself. 244 245 To compile this driver as a module, choose M here: the 246 module will be called loop. 247 248 Most users will answer N here. 249 250config BLK_DEV_CRYPTOLOOP 251 tristate "Cryptoloop Support" 252 select CRYPTO 253 select CRYPTO_CBC 254 depends on BLK_DEV_LOOP 255 ---help--- 256 Say Y here if you want to be able to use the ciphers that are 257 provided by the CryptoAPI as loop transformation. This might be 258 used as hard disk encryption. 259 260 WARNING: This device is not safe for journaled file systems like 261 ext3 or Reiserfs. Please use the Device Mapper crypto module 262 instead, which can be configured to be on-disk compatible with the 263 cryptoloop device. 264 265config BLK_DEV_NBD 266 tristate "Network block device support" 267 depends on NET 268 ---help--- 269 Saying Y here will allow your computer to be a client for network 270 block devices, i.e. it will be able to use block devices exported by 271 servers (mount file systems on them etc.). Communication between 272 client and server works over TCP/IP networking, but to the client 273 program this is hidden: it looks like a regular local file access to 274 a block device special file such as /dev/nd0. 275 276 Network block devices also allows you to run a block-device in 277 userland (making server and client physically the same computer, 278 communicating using the loopback network device). 279 280 Read <file:Documentation/nbd.txt> for more information, especially 281 about where to find the server code, which runs in user space and 282 does not need special kernel support. 283 284 Note that this has nothing to do with the network file systems NFS 285 or Coda; you can say N here even if you intend to use NFS or Coda. 286 287 To compile this driver as a module, choose M here: the 288 module will be called nbd. 289 290 If unsure, say N. 291 292config BLK_DEV_SX8 293 tristate "Promise SATA SX8 support" 294 depends on PCI 295 ---help--- 296 Saying Y or M here will enable support for the 297 Promise SATA SX8 controllers. 298 299 Use devices /dev/sx8/$N and /dev/sx8/$Np$M. 300 301config BLK_DEV_UB 302 tristate "Low Performance USB Block driver" 303 depends on USB 304 help 305 This driver supports certain USB attached storage devices 306 such as flash keys. 307 308 If you enable this driver, it is recommended to avoid conflicts 309 with usb-storage by enabling USB_LIBUSUAL. 310 311 If unsure, say N. 312 313config BLK_DEV_RAM 314 tristate "RAM disk support" 315 ---help--- 316 Saying Y here will allow you to use a portion of your RAM memory as 317 a block device, so that you can make file systems on it, read and 318 write to it and do all the other things that you can do with normal 319 block devices (such as hard drives). It is usually used to load and 320 store a copy of a minimal root file system off of a floppy into RAM 321 during the initial install of Linux. 322 323 Note that the kernel command line option "ramdisk=XX" is now 324 obsolete. For details, read <file:Documentation/ramdisk.txt>. 325 326 To compile this driver as a module, choose M here: the 327 module will be called rd. 328 329 Most normal users won't need the RAM disk functionality, and can 330 thus say N here. 331 332config BLK_DEV_RAM_COUNT 333 int "Default number of RAM disks" 334 default "16" 335 depends on BLK_DEV_RAM 336 help 337 The default value is 16 RAM disks. Change this if you know what you 338 are doing. If you boot from a filesystem that needs to be extracted 339 in memory, you will need at least one RAM disk (e.g. root on cramfs). 340 341config BLK_DEV_RAM_SIZE 342 int "Default RAM disk size (kbytes)" 343 depends on BLK_DEV_RAM 344 default "4096" 345 help 346 The default value is 4096 kilobytes. Only change this if you know 347 what you are doing. 348 349config BLK_DEV_RAM_BLOCKSIZE 350 int "Default RAM disk block size (bytes)" 351 depends on BLK_DEV_RAM 352 default "1024" 353 help 354 The default value is 1024 bytes. PAGE_SIZE is a much more 355 efficient choice however. The default is kept to ensure initrd 356 setups function - apparently needed by the rd_load_image routine 357 that supposes the filesystem in the image uses a 1024 blocksize. 358 359config CDROM_PKTCDVD 360 tristate "Packet writing on CD/DVD media" 361 depends on !UML 362 help 363 If you have a CDROM/DVD drive that supports packet writing, say 364 Y to include support. It should work with any MMC/Mt Fuji 365 compliant ATAPI or SCSI drive, which is just about any newer 366 DVD/CD writer. 367 368 Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs 369 is possible. 370 DVD-RW disks must be in restricted overwrite mode. 371 372 See the file <file:Documentation/cdrom/packet-writing.txt> 373 for further information on the use of this driver. 374 375 To compile this driver as a module, choose M here: the 376 module will be called pktcdvd. 377 378config CDROM_PKTCDVD_BUFFERS 379 int "Free buffers for data gathering" 380 depends on CDROM_PKTCDVD 381 default "8" 382 help 383 This controls the maximum number of active concurrent packets. More 384 concurrent packets can increase write performance, but also require 385 more memory. Each concurrent packet will require approximately 64Kb 386 of non-swappable kernel memory, memory which will be allocated when 387 a disc is opened for writing. 388 389config CDROM_PKTCDVD_WCACHE 390 bool "Enable write caching (EXPERIMENTAL)" 391 depends on CDROM_PKTCDVD && EXPERIMENTAL 392 help 393 If enabled, write caching will be set for the CD-R/W device. For now 394 this option is dangerous unless the CD-RW media is known good, as we 395 don't do deferred write error handling yet. 396 397config ATA_OVER_ETH 398 tristate "ATA over Ethernet support" 399 depends on NET 400 help 401 This driver provides Support for ATA over Ethernet block 402 devices like the Coraid EtherDrive (R) Storage Blade. 403 404config SUNVDC 405 tristate "Sun Virtual Disk Client support" 406 depends on SUN_LDOMS 407 help 408 Support for virtual disk devices as a client under Sun 409 Logical Domains. 410 411source "drivers/s390/block/Kconfig" 412 413config XILINX_SYSACE 414 tristate "Xilinx SystemACE support" 415 depends on 4xx 416 help 417 Include support for the Xilinx SystemACE CompactFlash interface 418 419config XEN_BLKDEV_FRONTEND 420 tristate "Xen virtual block device support" 421 depends on XEN 422 default y 423 help 424 This driver implements the front-end of the Xen virtual 425 block device driver. It communicates with a back-end driver 426 in another domain which drives the actual block device. 427 428config VIRTIO_BLK 429 tristate "Virtio block driver (EXPERIMENTAL)" 430 depends on EXPERIMENTAL && VIRTIO 431 ---help--- 432 This is the virtual block driver for lguest. Say Y or M. 433 434endif # BLK_DEV 435