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-Chapter 35. Usage of floppy tape drives on Linux
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-
-Chapter 35. Usage of floppy tape drives on Linux
-
-
-Albrecht Gebhardt
-
-Original text<albrecht.gebhardt@uni-klu.ac.at>
-
-Stefan G. Weichinger
-
-XML-conversion,Updates
-AMANDA Core Team
-<sgw@amanda.org>
-Amanda now supports the ftape driver version 3.04d (see http://www-
-math.math.rwth-aachen.de/~LBFM/claus/ftape ). It adjusts the blocksize
-automatically to 32k and supports QIC volume tables.
-It uses only one open() call for writing backups to one tape, so the "busy"-
-lamp of the drive will be on all the time. (With normal Amanda code it would be
-off in pauses between two files written to tape.)
-For volume table support you have to get libvtblc first (available at ftp://
-pc02-stat.sci.uni-klu.ac.at/pub/Linux/libvtblc.) This library contains the
-functions and subroutines from the vtblc utility, distributed with ftape.
-(Maybe this library will be part of a future ftape package).
-You have to set the raw tape device for volume table operations, usually /dev/
-rawft0, either via configure --with-ftape-rawdevice= or with rawtapedev in
-amanda.conf (configure checks for /dev/rawft[0-3], to get a guess for this
-value). Dont forget to make this device read/writeable for your backup user.
-For compilation you need the header files from ftape 3.04d in your include
-tree.
-The volumetable of a tape "amlabeled" TEST-VOL2 with 4 backups on it would look
-like (listed with vtblc utility from ftape):
-
- prompt: vtblc
-
- Nr Id Label Date Start End
- Space
-
- 0 VTBL TEST-VOL2 23:08:06 03/15/98 3 4 0.00
- %
- 1 VTBL gamma //beta/C 0 00:00:00 03/15/98 5 374 0.68
- %
- 2 VTBL gamma sda2 0 00:00:00 03/15/98 375 1029 1.21
- %
- 3 VTBL alpha sda2 0 00:00:00 03/15/98 1030 1906 1.62
- %
- 4 VTBL alpha sda6 0 00:00:00 03/15/98 1907 8092 11.45
- %
- 5 VTBL Amanda Tape End 01:45:15 03/16/98 8093 8094 0.00
- %
-
-With lvtblc, currently available with the libvtblc library, you can list the
-complete label strings (44 characters, not only the first 22 characters as with
-vtblc):
-
-
- prompt: lvtblc -l
-
- Nr Id Label Date
-
- 0 VTBL TEST-VOL2 23:08:06 03/15/98
- 1 VTBL gamma //beta/C 0 00:00:00 03/15/98
- 2 VTBL gamma sda2 0 00:00:00 03/15/98
- 3 VTBL alpha sda2 0 00:00:00 03/15/98
- 4 VTBL alpha sda6 0 00:00:00 03/15/98
- 5 VTBL Amanda Tape End 01:45:15 03/16/98
-
-Note on datestamps: volume 0 (Amanda label): reflects the time of starting the
-backup volume i (backup files): Amanda datestamps of the backup files last
-volume (end marker) : reflects the time of finishing the backup
-I tested this on a Linux machine (P90 / 96Mb RAM / 256 Mb swap) with two other
-clients (Linux / WfW) using
-
-* Linux Kernel 2.0.33,
-* ftape 3.04d,
-* Amanda 2.4.0b6p4
-
-with an internal Iomega Ditto 3200 (TR-3) drive attached to an Iomega Ditto
-Dash controller (at 2000 Kbps). My tapetype follows:
-
- define tapetype DITTO-TR3 {
- comment "Iomega DITTO 3200 Travan 3 tape drives"
- length 1500 mbytes #
- filemark 29 kbytes # ???
- speed 256 kbytes # = 2000 Kbit/s ?
- }
-
-
-
-Note
-
-Filemarks are not written to the tape (they are written to the header segment
-and use there 128 byte), so their size could even be 0. But a tape segment
-takes at least 29 kb (+3 kb ecc-code = 32 kb), so in the worst case an eof will
-waste 29 kb.
-
-Note
-
-Refer to http://www.amanda.org/docs/zftape.html for the current version of this
-document.
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