From: Kern Sibbald Date: Fri, 28 Oct 2005 09:34:45 +0000 (+0000) Subject: Add missing files X-Git-Tag: Release-1.38.0~24 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=8cc46f1c0a8d07f8829adacd3ebe2173a05eec03;p=bacula%2Fdocs Add missing files --- diff --git a/docs/developers/.cvsignore b/docs/developers/.cvsignore index e3da4f79..84b2b70f 100644 --- a/docs/developers/.cvsignore +++ b/docs/developers/.cvsignore @@ -1,3 +1,4 @@ +Makefile developersi-general.tex imagename_translations developers diff --git a/docs/images/bacu_logo-white.jpg b/docs/images/bacu_logo-white.jpg new file mode 100644 index 00000000..e308960f Binary files /dev/null and b/docs/images/bacu_logo-white.jpg differ diff --git a/docs/manual-de/dvd.tex b/docs/manual-de/dvd.tex new file mode 100644 index 00000000..846133c3 --- /dev/null +++ b/docs/manual-de/dvd.tex @@ -0,0 +1,251 @@ +%% +%% + +\section*{DVD Volumes} +\label{_DVDChapterStart} +\index[general]{DVD Volumes} +\index[general]{Writing DVDs} +\index[general]{DVD Writing} +\index[general]{Volumes!DVD} +\addcontentsline{toc}{section}{DVD Volumes} + +Bacula allows you to specify that you want to write to DVD. However, +this feature is implemented only in version 1.37 or later. +You may in fact write to DVD+RW, DVD+R, DVD-R, or DVD-RW +media. The actual process used by Bacula is to first write +the image to a spool directory, then when the Volume reaches +a certain size or, at your option, at the end of a Job, Bacula +will transfer the image from the spool directory to the +DVD. The actual work of transferring the image is done +by a script {\bf dvd-handler}, and the heart of that +script is a program called {\bf growisofs} which allows +creating or adding to a DVD ISO filesystem. + +You must have {\bf dvd+rw-tools} loaded on your system for DVD writing to +work. Please note that the original {\bf dvd+rw-tools} package does {\bf +NOT} work with Bacula. You must apply a patch which can be found in the +{\bf patches} directory of Bacula sources with the name +{\bf dvd+rw-tools-5.21.4.10.8.bacula.patch}. + +The fact that Bacula cannot use the OS to write directly +to the DVD makes the whole process a bit more error prone than +writing to a disk or a tape, but nevertheless, it does work if you +use some care to set it up properly. However, at the current time +(28 October 2005) we still consider this code to be experimental and of +BETA quality. As a consequence, please do careful testing before relying +on DVD backups in production. + +The remainder of this chapter explains the various directives that you can +use to control the DVD writing. + +\label{DVDdirectives} + +\subsection*{DVD Specific SD Directives} +\index[general]{Directives!DVD} +\index[general]{DVD Specific SD Directives } +\addcontentsline{toc}{subsection}{DVD Specific SD Directives} + +The following directives are added to the Storage daemon's +Device resource. + +\begin{description} + +\item [Requires Mount = {\it Yes|No}] + \index[sd]{Requires Mount } + You must set this directive to {\bf yes} for DVD-writers, and to {\bf no} for + all other devices (tapes/files). This directive indicates if the device + requires to be mounted using the {\bf Mount Command}. + To be able to write a DVD, the following directives must also be + defined: {\bf Mount Point}, {\bf Mount Command}, {\bf Unmount Command} and + {\bf Write Part Command}. + +\item [Mount Point = {\it directory}] + \index[sd]{Mount Point} + Directory where the device can be mounted. + +\item [Mount Command = {\it name-string}] + \index[sd]{Mount Command} + Command that must be executed to mount the device. Although the + device is written directly, the mount command is necessary in + order to determine the free space left on the DVD. Before the command is + executed, \%a is replaced with the Archive Device, and \%m with the Mount + Point. + + Most frequently, you will define it as follows: + +\footnotesize +\begin{verbatim} + Mount Command = "/bin/mount -t iso9660 -o ro %a %m" +\end{verbatim} +\normalsize + +\item [Unmount Command = {\it name-string}] + \index[sd]{Unmount Command} + Command that must be executed to unmount the device. Before the command is + executed, \%a is replaced with the Archive Device, and \%m with the Mount + Point. + + Most frequently, you will define it as follows: + +\footnotesize +\begin{verbatim} + Unmount Command = "/bin/umount %m" +\end{verbatim} +\normalsize + +\item [Write Part Command = {\it name-string}] + \index[sd]{Write Part Command } + Command that must be executed to write a part to the device. Before the + command is executed, \%a is replaced with the Archive Device, \%m with the + Mount Point, \%e is replaced with 1 if we are writing the first part, + and with 0 otherwise, and \%v with the current part filename. + + For a DVD, you will most frequently specify the Bacula supplied {\bf + dvd-handler} script as follows: + +\footnotesize +\begin{verbatim} + Write Part Command = "/path/dvd-handler %a write %e %v" +\end{verbatim} +\normalsize + + Where {\bf /path} is the path to your scripts install directory, and + dvd-handler is the Bacula supplied script file. + This command will already be present, but commented out, + in the default bacula-sd.conf file. To use it, simply remove + the comment (\#) symbol. + + +\item [Free Space Command = {\it name-string}] + \index[sd]{Free Space Command } + Command that must be executed to check how much free space is left on the + device. Before the command is executed,\%a is replaced with the Archive + Device, \%m with the Mount Point, \%e is replaced with 1 if we are writing + the first part, and with 0 otherwise, and \%v with the current part filename. + + For a DVD, you will most frequently specify the Bacula supplied {\bf + dvd-handler} script as follows: + +\footnotesize +\begin{verbatim} + Free Space Command = "/path/dvd-handler %a free" +\end{verbatim} +\normalsize + + Where {\bf /path} is the path to your scripts install directory, and + dvd-freespace is the Bacula supplied script file. + If you want to specify your own command, please look at the code in + dvd-handler to see what output Bacula expects from this command. + This command will already be present, but commented out, + in the default bacula-sd.conf file. To use it, simply remove + the comment (\#) symbol. + + If you do not set it, Bacula will expect there is always free space on the + device. + +\end{description} + +In addition to the directives specified above, you must also +specify the other standard Device resource directives. Please see the +sample DVD Device resource in the default bacula-sd.conf file. Be sure +to specify the raw device name for {\bf Archive Device}. It should +be a name such as {\bf /dev/cdrom} or {\bf /media/cdrecorder} or +{\bf /dev/dvd} depending on your system. It will not be a name such +as {\bf /mnt/cdrom}. + + +\subsection*{DVD Specific Director Directives} +\index[general]{Directives!DVD} +\index[general]{DVD Specific Director Directives } +\addcontentsline{toc}{subsection}{DVD Specific Director Directives} + +The following directives are added to the Director's Job resource. + +\label{WritePartAfterJob} +\begin{description} +\item [Write Part After Job = \lt{}yes|no\gt{}] + \index[dir]{Write Part After Job } + If this directive is set to {\bf yes} (default {\bf no}), the + Volume written to a temporary spool file for the current Job will + be written to the DVD as a new part file + will be created after the job is finished. + + It should be set to {\bf yes} when writing to devices that require a mount + (for example DVD), so you are sure that the current part, containing + this job's data, is written to the device, and that no data is left in + the temporary file on the hard disk. However, on some media, like DVD+R + and DVD-R, a lot of space (about 10Mb) is lost everytime a part is + written. So, if you run several jobs each after another, you could set + this directive to {\bf no} for all jobs, except the last one, to avoid + wasting too much space, but to ensure that the data is written to the + medium when all jobs are finished. + + This directive is ignored for devices other than DVDs. +\end{description} + + + +\label{DVDpoints} +\subsection*{Other Points} +\index[general]{Points!Other } +\index[general]{Other Points } +\addcontentsline{toc}{subsection}{Other Points} + +\begin{itemize} +\item Writing and reading of DVD+RW seems to work quite reliably + provided you are using the patched dvd+rw-mediainfo programs. + On the other hand, we do not have enough information to ensure + that DVD-RW or other forms of DVDs work correctly. +\item DVD+RW supports only about 1000 overwrites. Every time you + mount the filesystem read/write will count as one write. This can + add up quickly, so it is best to mount your DVD+RW filesystem read-only. + Bacula does not need the DVD to be mounted read-write, since it uses + the raw device for writing. +\item Reformatting DVD+RW 10-20 times can apparently make the medium + unusable. Normally you should not have to format or reformat + DVD+RW media. If it is necessary, current versions of growisofs will + do so automatically. +\item We have had several problems writing to DVD-RWs (this does NOT + concern DVD+RW), because these media have two writing-modes: {\bf + Incremental Sequential} and {\bf Restricted Overwrite}. Depending on + your device and the media you use, one of these modes may not work + correctly (e.g. {\bf Incremental Sequential} does not work with my NEC + DVD-writer and Verbatim DVD-RW). + + To retrieve the current mode of a DVD-RW, run: +\begin{verbatim} + dvd+rw-mediainfo /dev/xxx +\end{verbatim} + where you replace xxx with your DVD device name. + + {\bf Mounted Media} line should give you the information. + + To set the device to {\bf Restricted Overwrite} mode, run: +\begin{verbatim} + dvd+rw-format /dev/xxx +\end{verbatim} + If you want to set it back to the default {\bf Incremental Sequential} mode, run: +\begin{verbatim} + dvd+rw-format -blank /dev/xxx +\end{verbatim} + +\item Bacula only accepts to write to blank DVDs. To quickly blank a DVD+/-RW, run + this command: +\begin{verbatim} + dd if=/dev/zero bs=1024 count=512 | growisofs -Z /dev/xxx=/dev/fd/0 +\end{verbatim} + Then, try to mount the device, if it cannot be mounted, it will be considered + as blank by Bacula, if it can be mounted, try a full blank (see below). + +\item If you wish to blank completely a DVD+/-RW, use the following: +\begin{verbatim} + growisofs -Z /dev/xxx=/dev/zero +\end{verbatim} + where you replace xxx with your DVD device name. However, note that this + blanks the whole DVD, which takes quite a long time (16 minutes on mine). +\item DVD+RW and DVD-RW support only about 1000 overwrites (i.e. don't use the +same medium for years if you don't want to have problems...). + +\item For more informations about DVD writing, please look at the +\elink{dvd+rw-tools homepage}{http://fy.chalmers.se/~appro/linux/DVD+RW/}. +\end{itemize}