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