Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | # |
| 2 | # Ftape configuration |
| 3 | # |
| 4 | config ZFTAPE |
| 5 | tristate "Zftape, the VFS interface" |
| 6 | depends on FTAPE |
| 7 | ---help--- |
| 8 | Normally, you want to say Y or M. DON'T say N here or you |
| 9 | WON'T BE ABLE TO USE YOUR FLOPPY TAPE DRIVE. |
| 10 | |
| 11 | The ftape module itself no longer contains the routines necessary |
| 12 | to interface with the kernel VFS layer (i.e. to actually write data |
| 13 | to and read data from the tape drive). Instead the file system |
| 14 | interface (i.e. the hardware independent part of the driver) has |
| 15 | been moved to a separate module. |
| 16 | |
| 17 | To compile this driver as a module, choose M here: the |
| 18 | module will be called zftape. |
| 19 | |
| 20 | Regardless of whether you say Y or M here, an additional runtime |
| 21 | loadable module called `zft-compressor' which contains code to |
| 22 | support user transparent on-the-fly compression based on Ross |
| 23 | William's lzrw3 algorithm will be produced. If you have enabled the |
| 24 | kernel module loader (i.e. have said Y to "Kernel module loader |
| 25 | support", above) then `zft-compressor' will be loaded |
| 26 | automatically by zftape when needed. |
| 27 | |
| 28 | Despite its name, zftape does NOT use compression by default. The |
| 29 | file <file:Documentation/ftape.txt> contains a short description of |
| 30 | the most important changes in the file system interface compared to |
| 31 | previous versions of ftape. The ftape home page |
| 32 | <http://www.instmath.rwth-aachen.de/~heine/ftape/> contains |
| 33 | further information. |
| 34 | |
| 35 | IMPORTANT NOTE: zftape can read archives created by previous |
| 36 | versions of ftape and provide file mark support (i.e. fast skipping |
| 37 | between tape archives) but previous version of ftape will lack file |
| 38 | mark support when reading archives produced by zftape. |
| 39 | |
| 40 | config ZFT_DFLT_BLK_SZ |
| 41 | int "Default block size" |
| 42 | depends on ZFTAPE |
| 43 | default "10240" |
| 44 | ---help--- |
| 45 | If unsure leave this at its default value, i.e. 10240. Note that |
| 46 | you specify only the default block size here. The block size can be |
| 47 | changed at run time using the MTSETBLK tape operation with the |
| 48 | MTIOCTOP ioctl (i.e. with "mt -f /dev/qft0 setblk #BLKSZ" from the |
| 49 | shell command line). |
| 50 | |
| 51 | The probably most striking difference between zftape and previous |
| 52 | versions of ftape is the fact that all data must be written or read |
| 53 | in multiples of a fixed block size. The block size defaults to |
| 54 | 10240 which is what GNU tar uses. The values for the block size |
| 55 | should be either 1 or multiples of 1024 up to a maximum value of |
| 56 | 63488 (i.e. 62 K). If you specify `1' then zftape's builtin |
| 57 | compression will be disabled. |
| 58 | |
| 59 | Reasonable values are `10240' (GNU tar's default block size), |
| 60 | `5120' (afio's default block size), `32768' (default block size some |
| 61 | backup programs assume for SCSI tape drives) or `1' (no restriction |
| 62 | on block size, but disables builtin compression). |
| 63 | |
| 64 | comment "The compressor will be built as a module only!" |
| 65 | depends on FTAPE && ZFTAPE |
| 66 | |
| 67 | config ZFT_COMPRESSOR |
| 68 | tristate |
| 69 | depends on FTAPE!=n && ZFTAPE!=n |
| 70 | default m |
| 71 | |
| 72 | config FT_NR_BUFFERS |
| 73 | int "Number of ftape buffers (EXPERIMENTAL)" |
| 74 | depends on FTAPE && EXPERIMENTAL |
| 75 | default "3" |
| 76 | help |
| 77 | Please leave this at `3' unless you REALLY know what you are doing. |
| 78 | It is not necessary to change this value. Values below 3 make the |
| 79 | proper use of ftape impossible, values greater than 3 are a waste of |
| 80 | memory. You can change the amount of DMA memory used by ftape at |
| 81 | runtime with "mt -f /dev/qft0 setdrvbuffer #NUMBUFFERS". Each buffer |
| 82 | wastes 32 KB of memory. Please note that this memory cannot be |
| 83 | swapped out. |
| 84 | |
| 85 | config FT_PROC_FS |
| 86 | bool "Enable procfs status report (+2kb)" |
| 87 | depends on FTAPE && PROC_FS |
| 88 | ---help--- |
| 89 | Optional. Saying Y will result in creation of a directory |
| 90 | `/proc/ftape' under the /proc file system. The files can be viewed |
| 91 | with your favorite pager (i.e. use "more /proc/ftape/history" or |
| 92 | "less /proc/ftape/history" or simply "cat /proc/ftape/history"). The |
| 93 | file will contain some status information about the inserted |
| 94 | cartridge, the kernel driver, your tape drive, the floppy disk |
| 95 | controller and the error history for the most recent use of the |
| 96 | kernel driver. Saying Y will enlarge the size of the ftape driver |
| 97 | by approximately 2 KB. |
| 98 | |
| 99 | WARNING: When compiling ftape as a module (i.e. saying M to "Floppy |
| 100 | tape drive") it is dangerous to use ftape's /proc file system |
| 101 | interface. Accessing `/proc/ftape' while the module is unloaded will |
| 102 | result in a kernel Oops. This cannot be fixed from inside ftape. |
| 103 | |
| 104 | choice |
| 105 | prompt "Debugging output" |
| 106 | depends on FTAPE |
| 107 | default FT_NORMAL_DEBUG |
| 108 | |
| 109 | config FT_NORMAL_DEBUG |
| 110 | bool "Normal" |
| 111 | ---help--- |
| 112 | This option controls the amount of debugging output the ftape driver |
| 113 | is ABLE to produce; it does not increase or diminish the debugging |
| 114 | level itself. If unsure, leave this at its default setting, |
| 115 | i.e. choose "Normal". |
| 116 | |
| 117 | Ftape can print lots of debugging messages to the system console |
| 118 | resp. kernel log files. Reducing the amount of possible debugging |
| 119 | output reduces the size of the kernel module by some KB, so it might |
| 120 | be a good idea to use "None" for emergency boot floppies. |
| 121 | |
| 122 | If you want to save memory then the following strategy is |
| 123 | recommended: leave this option at its default setting "Normal" until |
| 124 | you know that the driver works as expected, afterwards reconfigure |
| 125 | the kernel, this time specifying "Reduced" or "None" and recompile |
| 126 | and install the kernel as usual. Note that choosing "Excessive" |
| 127 | debugging output does not increase the amount of debugging output |
| 128 | printed to the console but only makes it possible to produce |
| 129 | "Excessive" debugging output. |
| 130 | |
| 131 | Please read <file:Documentation/ftape.txt> for a short description |
| 132 | how to control the amount of debugging output. |
| 133 | |
| 134 | config FT_FULL_DEBUG |
| 135 | bool "Excessive" |
| 136 | help |
| 137 | Extremely verbose output for driver debugging purposes. |
| 138 | |
| 139 | config FT_NO_TRACE |
| 140 | bool "Reduced" |
| 141 | help |
| 142 | Reduced tape driver debugging output. |
| 143 | |
| 144 | config FT_NO_TRACE_AT_ALL |
| 145 | bool "None" |
| 146 | help |
| 147 | Suppress all debugging output from the tape drive. |
| 148 | |
| 149 | endchoice |
| 150 | |
| 151 | comment "Hardware configuration" |
| 152 | depends on FTAPE |
| 153 | |
| 154 | choice |
| 155 | prompt "Floppy tape controllers" |
| 156 | depends on FTAPE |
| 157 | default FT_STD_FDC |
| 158 | |
| 159 | config FT_STD_FDC |
| 160 | bool "Standard" |
| 161 | ---help--- |
| 162 | Only change this setting if you have a special controller. If you |
| 163 | didn't plug any add-on card into your computer system but just |
| 164 | plugged the floppy tape cable into the already existing floppy drive |
| 165 | controller then you don't want to change the default setting, |
| 166 | i.e. choose "Standard". |
| 167 | |
| 168 | Choose "MACH-2" if you have a Mountain Mach-2 controller. |
| 169 | Choose "FC-10/FC-20" if you have a Colorado FC-10 or FC-20 |
| 170 | controller. |
| 171 | Choose "Alt/82078" if you have another controller that is located at |
| 172 | an IO base address different from the standard floppy drive |
| 173 | controller's base address of `0x3f0', or uses an IRQ (interrupt) |
| 174 | channel different from `6', or a DMA channel different from |
| 175 | `2'. This is necessary for any controller card that is based on |
| 176 | Intel's 82078 FDC such as Seagate's, Exabyte's and Iomega's "high |
| 177 | speed" controllers. |
| 178 | |
| 179 | If you choose something other than "Standard" then please make |
| 180 | sure that the settings for the IO base address and the IRQ and DMA |
| 181 | channel in the configuration menus below are correct. Use the manual |
| 182 | of your tape drive to determine the correct settings! |
| 183 | |
| 184 | If you are already successfully using your tape drive with another |
| 185 | operating system then you definitely should use the same settings |
| 186 | for the IO base, the IRQ and DMA channel that have proven to work |
| 187 | with that other OS. |
| 188 | |
| 189 | Note that this menu lets you specify only the default setting for |
| 190 | the hardware setup. The hardware configuration can be changed at |
| 191 | boot time (when ftape is compiled into the kernel, i.e. if you |
| 192 | have said Y to "Floppy tape drive") or module load time (i.e. if you |
| 193 | have said M to "Floppy tape drive"). |
| 194 | |
| 195 | Please read also the file <file:Documentation/ftape.txt> which |
| 196 | contains a short description of the parameters that can be set at |
| 197 | boot or load time. If you want to use your floppy tape drive on a |
| 198 | PCI-bus based system, please read the file |
| 199 | <file:drivers/char/ftape/README.PCI>. |
| 200 | |
| 201 | config FT_MACH2 |
| 202 | bool "MACH-2" |
| 203 | |
| 204 | config FT_PROBE_FC10 |
| 205 | bool "FC-10/FC-20" |
| 206 | |
| 207 | config FT_ALT_FDC |
| 208 | bool "Alt/82078" |
| 209 | |
| 210 | endchoice |
| 211 | |
| 212 | comment "Consult the manuals of your tape drive for the correct settings!" |
| 213 | depends on FTAPE && !FT_STD_FDC |
| 214 | |
| 215 | config FT_FDC_BASE |
| 216 | hex "IO base of the floppy disk controller" |
| 217 | depends on FTAPE && !FT_STD_FDC |
| 218 | default "0" |
| 219 | ---help--- |
| 220 | You don't need to specify a value if the following default |
| 221 | settings for the base IO address are correct: |
| 222 | <<< MACH-2 : 0x1E0 >>> |
| 223 | <<< FC-10/FC-20: 0x180 >>> |
| 224 | <<< Secondary : 0x370 >>> |
| 225 | Secondary refers to a secondary FDC controller like the "high speed" |
| 226 | controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. |
| 227 | Please make sure that the setting for the IO base address |
| 228 | specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR |
| 229 | CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already |
| 230 | successfully using the tape drive with another operating system then |
| 231 | you definitely should use the same settings for the IO base that has |
| 232 | proven to work with that other OS. |
| 233 | |
| 234 | Note that this menu lets you specify only the default setting for |
| 235 | the IO base. The hardware configuration can be changed at boot time |
| 236 | (when ftape is compiled into the kernel, i.e. if you specified Y to |
| 237 | "Floppy tape drive") or module load time (i.e. if you have said M to |
| 238 | "Floppy tape drive"). |
| 239 | |
| 240 | Please read also the file <file:Documentation/ftape.txt> which |
| 241 | contains a short description of the parameters that can be set at |
| 242 | boot or load time. |
| 243 | |
| 244 | config FT_FDC_IRQ |
| 245 | int "IRQ channel of the floppy disk controller" |
| 246 | depends on FTAPE && !FT_STD_FDC |
| 247 | default "0" |
| 248 | ---help--- |
| 249 | You don't need to specify a value if the following default |
| 250 | settings for the interrupt channel are correct: |
| 251 | <<< MACH-2 : 6 >>> |
| 252 | <<< FC-10/FC-20: 9 >>> |
| 253 | <<< Secondary : 6 >>> |
| 254 | Secondary refers to secondary a FDC controller like the "high speed" |
| 255 | controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. |
| 256 | Please make sure that the setting for the IO base address |
| 257 | specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR |
| 258 | CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already |
| 259 | successfully using the tape drive with another operating system then |
| 260 | you definitely should use the same settings for the IO base that has |
| 261 | proven to work with that other OS. |
| 262 | |
| 263 | Note that this menu lets you specify only the default setting for |
| 264 | the IRQ channel. The hardware configuration can be changed at boot |
| 265 | time (when ftape is compiled into the kernel, i.e. if you said Y to |
| 266 | "Floppy tape drive") or module load time (i.e. if you said M to |
| 267 | "Floppy tape drive"). |
| 268 | |
| 269 | Please read also the file <file:Documentation/ftape.txt> which |
| 270 | contains a short description of the parameters that can be set at |
| 271 | boot or load time. |
| 272 | |
| 273 | config FT_FDC_DMA |
| 274 | int "DMA channel of the floppy disk controller" |
| 275 | depends on FTAPE && !FT_STD_FDC |
| 276 | default "0" |
| 277 | ---help--- |
| 278 | You don't need to specify a value if the following default |
| 279 | settings for the DMA channel are correct: |
| 280 | <<< MACH-2 : 2 >>> |
| 281 | <<< FC-10/FC-20: 3 >>> |
| 282 | <<< Secondary : 2 >>> |
| 283 | Secondary refers to a secondary FDC controller like the "high speed" |
| 284 | controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. |
| 285 | Please make sure that the setting for the IO base address |
| 286 | specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR |
| 287 | CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already |
| 288 | successfully using the tape drive with another operating system then |
| 289 | you definitely should use the same settings for the IO base that has |
| 290 | proven to work with that other OS. |
| 291 | |
| 292 | Note that this menu lets you specify only the default setting for |
| 293 | the DMA channel. The hardware configuration can be changed at boot |
| 294 | time (when ftape is compiled into the kernel, i.e. if you said Y to |
| 295 | "Floppy tape drive") or module load time (i.e. if you said M to |
| 296 | "Floppy tape drive"). |
| 297 | |
| 298 | Please read also the file <file:Documentation/ftape.txt> which |
| 299 | contains a short description of the parameters that can be set at |
| 300 | boot or load time. |
| 301 | |
| 302 | config FT_FDC_THR |
| 303 | int "Default FIFO threshold (EXPERIMENTAL)" |
| 304 | depends on FTAPE && EXPERIMENTAL |
| 305 | default "8" |
| 306 | help |
| 307 | Set the FIFO threshold of the FDC. If this is higher the DMA |
| 308 | controller may serve the FDC after a higher latency time. If this is |
| 309 | lower, fewer DMA transfers occur leading to less bus contention. |
| 310 | You may try to tune this if ftape annoys you with "reduced data |
| 311 | rate because of excessive overrun errors" messages. However, this |
| 312 | doesn't seem to have too much effect. |
| 313 | |
| 314 | If unsure, don't touch the initial value, i.e. leave it at "8". |
| 315 | |
| 316 | config FT_FDC_MAX_RATE |
| 317 | int "Maximal data rate to use (EXPERIMENTAL)" |
| 318 | depends on FTAPE && EXPERIMENTAL |
| 319 | default "2000" |
| 320 | ---help--- |
| 321 | With some motherboard/FDC combinations ftape will not be able to |
| 322 | run your FDC/tape drive combination at the highest available |
| 323 | speed. If this is the case you'll encounter "reduced data rate |
| 324 | because of excessive overrun errors" messages and lots of retries |
| 325 | before ftape finally decides to reduce the data rate. |
| 326 | |
| 327 | In this case it might be desirable to tell ftape beforehand that |
| 328 | it need not try to run the tape drive at the highest available |
| 329 | speed. If unsure, leave this disabled, i.e. leave it at 2000 |
| 330 | bits/sec. |
| 331 | |
| 332 | config FT_ALPHA_CLOCK |
| 333 | int "CPU clock frequency of your DEC Alpha" if ALPHA |
| 334 | depends on FTAPE |
| 335 | default "0" |
| 336 | help |
| 337 | On some DEC Alpha machines the CPU clock frequency cannot be |
| 338 | determined automatically, so you need to specify it here ONLY if |
| 339 | running a DEC Alpha, otherwise this setting has no effect. |
| 340 | |