ftape
I will eventually include an installation guide in this section. For the
moment being, you'll have to do with the documen that is included in the
ftape
distribution.
ftape
ftape
is a driver program that controls various low-cost tape drives
that connect to the floppy controller.
ftape
is not a backup program as such; it is a device driver, which
allows you to use the tape drive (just like the SoundBlaster 16 driver let
you use your sound card) through the device file /dev/[n]rft[0-3]
.
ftape
is written by Bas Laarhoven <bas@vimec.nl>
, with
``a little help from his friends'' to sort out the ECC (Error Correcting Code)
stuff. ftape
is copyrighted by Bas under the GNU General Public
License, which basically says: ``go ahead and share this with the world, just
don't disallow other people from copying it further''.
ftape
is currently beta testing, and has been that for some time now.
It is reliable enough for critical backups (but always remember to check your
backups, so you won't get a nasty surprise some day).
ftape
supports drives that conform to the QIC-117 and one of the
QIC-80, QIC-40, QIC-3010, and QIC-3020 standards. ftape
does
not support QIC-02 tape drives or drives that connect via a SCSI
interface, e.g. DAT drives. SCSI drives are accessed as
/dev/[n]st[0-7]
and are supported by the kernel through the SCSI
drivers. If you look for help on SCSI tape drives, you should read the
SCSI-howto
. See section
Supported drives
and
Un-supported drives
for a list of
supported and unsupported drives.
No, IDE tape drives are not supported. In fact, the first drives are just emerging, so I'd be surprised if you have one. IDE tape drives will be supported by the IDE/ATAPI driver, written by Mark Lord and Steven Snyder. If you do have an IDE tape drive, and are interested in helping debugging, you should contact Mark <mlord@bnr.ca> .
ftape
?You can achieve quite respectable backup and restore speeds with
ftape
: I have a Colorado DJ-20 and an Adaptec 1542CF controller, and
have measured a 4.25Mbyte/min sustained data transfer rate (no compression)
across a 70Mbyte tar archive, while comparing the archive on the tape with
data on my IDE disk. The speed of ftape
is mostly dependent on the
data transfer rate of your FDC: The AHA1542CF has a ``post-1991 82077'' FDC,
and it will push 1Mbit/sec at the tape drive. If you have an FDC which can
only deliver 500Kbit/sec data rates, you will see half the transfer rate
(well, roughly).
ftape
There are three source distributions that you must have to get ftape
running:
ftape
v2.02e / v2.03bmodules
v1.2.8Note that you cannot use modules-1.2.8 with a pre-1.2.8 kernel; if you upgrade to modules-1.2.8, you must update your kernel too.
ftape
ftape
can be fetched from
ftp://sunsite.unc.edu/pub/Linux/kernel/tapes
(and its mirrors):
You should get the following files:
ftape-2.02e.tar.gz
or ftape-2.03b.tar.gz
ftape-lsm
The .tar.gz
and patch.gz
files are the ftape
driver
proper, while the lsm
file is a Linux Software Map (LSM) file for the
LSM project.
If you have a Iomega Ditto 3200 drive, you need to add the following line to
vendors.h
somewhere appropriate (in the QIC117_VENDORS
#define
):
{ 0x08882, 80, wake_up_colorado, "Iomega 3200" }, \
modules
Newer kernels (from 1.1.85 and on), have improved support for loadable modules
(by Bjørn Ekwall and Jacques Gelinas), which (if possible) allows you
to insert modules compiled for an `old' kernel into a `new' kernel. To
compile the kernel with this improved module support, you need the
modules-1.2.8.tar.gz
file. The modules packages can be found on
tsx-11.mit.edu
and sunsite.unc.edu
. You must compile and
install it before you compile the kernel.
modules-1.2.8
?The v1.2.8
package no longer exhibits the infamous insmod
Oops bug, when ftape
is inserted into the kernel. This was, by the
way, caused because insmod
did not handle modules with more that
4Kbyte of static data correctly. However, this is not the greatest advantage
of the v1.2.8
package.
With v1.2.8
comes the kerneld
daemon which can automatically
insert the needed modules as needed. This requires a patch to the
v1.2.x
kernels, but the patch is supposed to be included as a
standard part of the kernel, when the 1.3
kernel series starts (well,
the 1.3 series is well underway, but I don't know if the patch has gotten into
the kernel. Can anyone enlighten me?).
modules-1.1.87
Although you still can use version 1.1.87
of the modules utilities, I
recommend that everyone upgrade to the 1.2.8
version.
If do not wish to upgrade (or cannot), here is what to remember when
installing the 1.1.87
version:
The modules-1.1.87
package has a bug which will cause the
insmod
to generate a kernel Oops, which the ftape
modules is
inserted. This bug is corrected by the insmod.c
, insmod.h
,
and load_aout.c
files that you can find in the
ftape-2.03/insmod
directory. (From now on, mail about
Oops
'es when ftape
is inserted will quietly go to
/dev/null
).
modules-1.2.8
Extract the files somewhere convinient. The, go into the
modules-1.2.8
directory and say make all; make install
.
Remeber that you must be root to be able to install the files and man pages.
Since Linux version 1.2 has been out for some time I assume that everyone has switched over to it. If you have not already switched over, I assume you have a very good reason for not doing so, and that you can cope with the differences in installation etc, that it will make for you.
The kernel can be fetched from a large number of sites all over the world, including these:
sunsite.unc.edu [152.2.22.81]: /pub/Linux/kernel/tapes/
tsx-11.mit.edu [18.172.1.2]: /pub/linux/sources/system/
ftp.funet.fi [128.214.248.6]: /pub/OS/Linux/PEOPLE/Linus/
ftp.helsinki.fi [128.214.38.235]:/pub/Software/Linux/Kernel/
You will find a number of subdirectories, including two named v1.2
and v1.3
. These contain (you guessed it!) v1.2
and
v1.3
of the kernel.
The v1.3
is the development kernel branch, while the v1.2
series are updated rather seldomly, and only after some serious bug has been
found in it, and a field-tested fix has been provided.
For a minimum-hazzle kernel, you should go for the v1.2
series, but
if you are more adventerous (or the v1.2
kernels lack your favorite
CDROM driver), you can get a v1.3
kernel.
Be warned, though, that the v1.3
kernels are of unknown stability,
and you should be well fared in patching, configuring, and compiling the
kernel.
ftape-2.02
, or earlierSince ftape
both has been improved and some more bugs have been
thrown out, you should consider upgrading to 2.03b
mandatory.
ftape-2.02
, or earlierFollowing the development of theftape
driverIf you want to follow the development of the ftape
driver, you should
consider subscribing to the TAPE mailing list on vger
. To subscribe
to it, send a mail saying `subscribe linux-tape
' to
majordomo@vger.rutgers.edu
. When you subscribe, you will be sent a
greeting mail, which will tell you how to submit real mails and how to get off
the list again.
ftape
driverThere is included an installation guide (the file Install-guide
) in
the ftape
distribution; please read that.
No! Honestly, noone is working on it: If you want to work on it, drop Bas a
line. Until then, you'll have to use MessyDOS (arghhh!) instead or buy
preformatted tapes. However, some of the preformatted tapes are not
checked for bad sectors!. If the ftape
driver encounters a tape with
no bad blocks, it will issue a warning. If ftape
barfs at your
preformatted tapes, try out your DOS software. If both the DOS software
and ftape
barfs on your tapes, a reformat will very probably
cure the problem.
Note that to be able to use your newly formatted tapes under ftape, you must erase the tape first:
mt -f /dev/nftape erase
These are known to work:
tape.exe
)qs3.exe
-- QICstream v3?)These programs are known to be more or less buggy:
In fact, most software under DOS should work. The Conner Backup Basics v1.0
has a parameter off by one (someone could not read the QIC-80 specs right!),
which is corrected in version 1.1. However, ftape
detects this, and
will work around it. Dennis T. Flaherty
(<dennisf@denix.elk.miles.com>
) report that Conner C250MQ owners
can obtain the new v1.1, by calling Conner at 1-800-4Conner (in the US) and
ask for an upgrade (for a nominal fee for the floppy). The Windows versions
should work fine. Some versions of Colorado's tape program for windows, has
an off-by-one error in the number of segments. ftape
also detect and
work around that bug.
Central Point Backup can be used, but it wastes precious tape space when it encounters a bad spot on the tape.
NOTE: If you are running a formatting software under DOS, which is not mentioned here, please mail the relevant info to me ( <khp@pip.dknet.dk> ), so I can update the list.
ftape
and floppiesSince both the floppy driver and ftape
needs the FDC (and IRQ6), they
cannot run concurrently. Thus, if you have mounted a floppy and then try to
access the tape drive, ftape
will complain that it cannot grab IRQ6
and then die. This is especially a problem when designing a emergency disk
for use with ftape. This solution is to either load the boot/root disk into a
ramdisk and then unmount the floppy, or have two FDC's.
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