mirror of https://gitee.com/openkylin/linux.git
331 lines
13 KiB
Plaintext
331 lines
13 KiB
Plaintext
#
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# Ftape configuration
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#
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config ZFTAPE
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tristate "Zftape, the VFS interface"
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depends on FTAPE
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---help---
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Normally, you want to say Y or M. DON'T say N here or you
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WON'T BE ABLE TO USE YOUR FLOPPY TAPE DRIVE.
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The ftape module itself no longer contains the routines necessary
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to interface with the kernel VFS layer (i.e. to actually write data
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to and read data from the tape drive). Instead the file system
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interface (i.e. the hardware independent part of the driver) has
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been moved to a separate module.
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To compile this driver as a module, choose M here: the
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module will be called zftape.
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Regardless of whether you say Y or M here, an additional runtime
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loadable module called `zft-compressor' which contains code to
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support user transparent on-the-fly compression based on Ross
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William's lzrw3 algorithm will be produced. If you have enabled the
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kernel module loader (i.e. have said Y to "Kernel module loader
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support", above) then `zft-compressor' will be loaded
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automatically by zftape when needed.
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Despite its name, zftape does NOT use compression by default.
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config ZFT_DFLT_BLK_SZ
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int "Default block size"
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depends on ZFTAPE
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default "10240"
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---help---
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If unsure leave this at its default value, i.e. 10240. Note that
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you specify only the default block size here. The block size can be
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changed at run time using the MTSETBLK tape operation with the
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MTIOCTOP ioctl (i.e. with "mt -f /dev/qft0 setblk #BLKSZ" from the
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shell command line).
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The probably most striking difference between zftape and previous
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versions of ftape is the fact that all data must be written or read
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in multiples of a fixed block size. The block size defaults to
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10240 which is what GNU tar uses. The values for the block size
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should be either 1 or multiples of 1024 up to a maximum value of
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63488 (i.e. 62 K). If you specify `1' then zftape's builtin
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compression will be disabled.
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Reasonable values are `10240' (GNU tar's default block size),
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`5120' (afio's default block size), `32768' (default block size some
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backup programs assume for SCSI tape drives) or `1' (no restriction
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on block size, but disables builtin compression).
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comment "The compressor will be built as a module only!"
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depends on FTAPE && ZFTAPE
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config ZFT_COMPRESSOR
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tristate
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depends on FTAPE!=n && ZFTAPE!=n
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default m
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config FT_NR_BUFFERS
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int "Number of ftape buffers (EXPERIMENTAL)"
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depends on FTAPE && EXPERIMENTAL
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default "3"
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help
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Please leave this at `3' unless you REALLY know what you are doing.
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It is not necessary to change this value. Values below 3 make the
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proper use of ftape impossible, values greater than 3 are a waste of
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memory. You can change the amount of DMA memory used by ftape at
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runtime with "mt -f /dev/qft0 setdrvbuffer #NUMBUFFERS". Each buffer
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wastes 32 KB of memory. Please note that this memory cannot be
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swapped out.
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config FT_PROC_FS
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bool "Enable procfs status report (+2kb)"
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depends on FTAPE && PROC_FS
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---help---
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Optional. Saying Y will result in creation of a directory
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`/proc/ftape' under the /proc file system. The files can be viewed
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with your favorite pager (i.e. use "more /proc/ftape/history" or
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"less /proc/ftape/history" or simply "cat /proc/ftape/history"). The
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file will contain some status information about the inserted
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cartridge, the kernel driver, your tape drive, the floppy disk
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controller and the error history for the most recent use of the
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kernel driver. Saying Y will enlarge the size of the ftape driver
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by approximately 2 KB.
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WARNING: When compiling ftape as a module (i.e. saying M to "Floppy
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tape drive") it is dangerous to use ftape's /proc file system
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interface. Accessing `/proc/ftape' while the module is unloaded will
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result in a kernel Oops. This cannot be fixed from inside ftape.
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choice
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prompt "Debugging output"
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depends on FTAPE
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default FT_NORMAL_DEBUG
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config FT_NORMAL_DEBUG
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bool "Normal"
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---help---
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This option controls the amount of debugging output the ftape driver
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is ABLE to produce; it does not increase or diminish the debugging
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level itself. If unsure, leave this at its default setting,
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i.e. choose "Normal".
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Ftape can print lots of debugging messages to the system console
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resp. kernel log files. Reducing the amount of possible debugging
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output reduces the size of the kernel module by some KB, so it might
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be a good idea to use "None" for emergency boot floppies.
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If you want to save memory then the following strategy is
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recommended: leave this option at its default setting "Normal" until
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you know that the driver works as expected, afterwards reconfigure
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the kernel, this time specifying "Reduced" or "None" and recompile
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and install the kernel as usual. Note that choosing "Excessive"
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debugging output does not increase the amount of debugging output
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printed to the console but only makes it possible to produce
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"Excessive" debugging output.
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Please read <file:Documentation/ftape.txt> for a short description
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how to control the amount of debugging output.
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config FT_FULL_DEBUG
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bool "Excessive"
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help
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Extremely verbose output for driver debugging purposes.
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config FT_NO_TRACE
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bool "Reduced"
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help
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Reduced tape driver debugging output.
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config FT_NO_TRACE_AT_ALL
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bool "None"
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help
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Suppress all debugging output from the tape drive.
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endchoice
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comment "Hardware configuration"
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depends on FTAPE
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choice
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prompt "Floppy tape controllers"
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depends on FTAPE
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default FT_STD_FDC
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config FT_STD_FDC
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bool "Standard"
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---help---
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Only change this setting if you have a special controller. If you
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didn't plug any add-on card into your computer system but just
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plugged the floppy tape cable into the already existing floppy drive
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controller then you don't want to change the default setting,
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i.e. choose "Standard".
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Choose "MACH-2" if you have a Mountain Mach-2 controller.
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Choose "FC-10/FC-20" if you have a Colorado FC-10 or FC-20
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controller.
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Choose "Alt/82078" if you have another controller that is located at
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an IO base address different from the standard floppy drive
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controller's base address of `0x3f0', or uses an IRQ (interrupt)
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channel different from `6', or a DMA channel different from
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`2'. This is necessary for any controller card that is based on
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Intel's 82078 FDC such as Seagate's, Exabyte's and Iomega's "high
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speed" controllers.
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If you choose something other than "Standard" then please make
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sure that the settings for the IO base address and the IRQ and DMA
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channel in the configuration menus below are correct. Use the manual
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of your tape drive to determine the correct settings!
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If you are already successfully using your tape drive with another
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operating system then you definitely should use the same settings
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for the IO base, the IRQ and DMA channel that have proven to work
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with that other OS.
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Note that this menu lets you specify only the default setting for
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the hardware setup. The hardware configuration can be changed at
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boot time (when ftape is compiled into the kernel, i.e. if you
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have said Y to "Floppy tape drive") or module load time (i.e. if you
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have said M to "Floppy tape drive").
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Please read also the file <file:Documentation/ftape.txt> which
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contains a short description of the parameters that can be set at
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boot or load time. If you want to use your floppy tape drive on a
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PCI-bus based system, please read the file
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<file:drivers/char/ftape/README.PCI>.
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config FT_MACH2
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bool "MACH-2"
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config FT_PROBE_FC10
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bool "FC-10/FC-20"
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config FT_ALT_FDC
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bool "Alt/82078"
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endchoice
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comment "Consult the manuals of your tape drive for the correct settings!"
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depends on FTAPE && !FT_STD_FDC
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config FT_FDC_BASE
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hex "IO base of the floppy disk controller"
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depends on FTAPE && !FT_STD_FDC
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default "0"
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---help---
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You don't need to specify a value if the following default
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settings for the base IO address are correct:
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<<< MACH-2 : 0x1E0 >>>
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<<< FC-10/FC-20: 0x180 >>>
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<<< Secondary : 0x370 >>>
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Secondary refers to a secondary FDC controller like the "high speed"
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controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash.
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Please make sure that the setting for the IO base address
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specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR
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CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already
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successfully using the tape drive with another operating system then
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you definitely should use the same settings for the IO base that has
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proven to work with that other OS.
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Note that this menu lets you specify only the default setting for
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the IO base. The hardware configuration can be changed at boot time
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(when ftape is compiled into the kernel, i.e. if you specified Y to
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"Floppy tape drive") or module load time (i.e. if you have said M to
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"Floppy tape drive").
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Please read also the file <file:Documentation/ftape.txt> which
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contains a short description of the parameters that can be set at
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boot or load time.
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config FT_FDC_IRQ
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int "IRQ channel of the floppy disk controller"
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depends on FTAPE && !FT_STD_FDC
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default "0"
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---help---
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You don't need to specify a value if the following default
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settings for the interrupt channel are correct:
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<<< MACH-2 : 6 >>>
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<<< FC-10/FC-20: 9 >>>
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<<< Secondary : 6 >>>
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Secondary refers to secondary a FDC controller like the "high speed"
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controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash.
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Please make sure that the setting for the IO base address
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specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR
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CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already
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successfully using the tape drive with another operating system then
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you definitely should use the same settings for the IO base that has
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proven to work with that other OS.
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Note that this menu lets you specify only the default setting for
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the IRQ channel. The hardware configuration can be changed at boot
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time (when ftape is compiled into the kernel, i.e. if you said Y to
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"Floppy tape drive") or module load time (i.e. if you said M to
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"Floppy tape drive").
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Please read also the file <file:Documentation/ftape.txt> which
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contains a short description of the parameters that can be set at
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boot or load time.
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config FT_FDC_DMA
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int "DMA channel of the floppy disk controller"
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depends on FTAPE && !FT_STD_FDC
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default "0"
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---help---
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You don't need to specify a value if the following default
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settings for the DMA channel are correct:
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<<< MACH-2 : 2 >>>
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<<< FC-10/FC-20: 3 >>>
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<<< Secondary : 2 >>>
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Secondary refers to a secondary FDC controller like the "high speed"
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controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash.
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Please make sure that the setting for the IO base address
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specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR
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CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already
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successfully using the tape drive with another operating system then
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you definitely should use the same settings for the IO base that has
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proven to work with that other OS.
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Note that this menu lets you specify only the default setting for
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the DMA channel. The hardware configuration can be changed at boot
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time (when ftape is compiled into the kernel, i.e. if you said Y to
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"Floppy tape drive") or module load time (i.e. if you said M to
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"Floppy tape drive").
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Please read also the file <file:Documentation/ftape.txt> which
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contains a short description of the parameters that can be set at
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boot or load time.
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config FT_FDC_THR
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int "Default FIFO threshold (EXPERIMENTAL)"
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depends on FTAPE && EXPERIMENTAL
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default "8"
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help
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Set the FIFO threshold of the FDC. If this is higher the DMA
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controller may serve the FDC after a higher latency time. If this is
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lower, fewer DMA transfers occur leading to less bus contention.
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You may try to tune this if ftape annoys you with "reduced data
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rate because of excessive overrun errors" messages. However, this
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doesn't seem to have too much effect.
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If unsure, don't touch the initial value, i.e. leave it at "8".
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config FT_FDC_MAX_RATE
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int "Maximal data rate to use (EXPERIMENTAL)"
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depends on FTAPE && EXPERIMENTAL
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default "2000"
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---help---
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With some motherboard/FDC combinations ftape will not be able to
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run your FDC/tape drive combination at the highest available
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speed. If this is the case you'll encounter "reduced data rate
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because of excessive overrun errors" messages and lots of retries
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before ftape finally decides to reduce the data rate.
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In this case it might be desirable to tell ftape beforehand that
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it need not try to run the tape drive at the highest available
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speed. If unsure, leave this disabled, i.e. leave it at 2000
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bits/sec.
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config FT_ALPHA_CLOCK
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int "CPU clock frequency of your DEC Alpha" if ALPHA
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depends on FTAPE
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default "0"
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help
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On some DEC Alpha machines the CPU clock frequency cannot be
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determined automatically, so you need to specify it here ONLY if
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running a DEC Alpha, otherwise this setting has no effect.
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