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@@ -30,7 +30,8 @@
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\item The disk may be damaged by vibrations during the daily commute.
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\item The computer where you keep the unique copy of your thesis
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may be stolen.
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- \item Or after some time it may simply age and stop operating.
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+ \item After some time the disk may simply stop operating because of ageing.
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+ \item But often the principal cause of data loss is that thing that it is between the keyboard and the chair.
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\end{itemize}
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\end{frame}
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@@ -117,7 +118,7 @@
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\begin{frame}
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\frametitle{GNU ddrescue}
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- gdrescue is an enhanced version of dd that tries to rescue good parts in case of read errors. It may be usefull to recover data from a drive with some damaged sector.\\
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+ gdrescue is an enhanced version of dd that tries to rescue good parts in case of read errors. It may be useful to recover data from a drive with some damaged sector.\\
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Usage Example:
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\begin{itemize}
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\item \textit{ddrescue [options] /dev/sdX outfile mapfile}
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@@ -156,7 +157,7 @@
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\item rsync -Pr source destination
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\begin{itemize}
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\item \textbf{P:} keep partially transferred files if the transfer is interrupted.
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- \item \textbf{r:} recursive directory option
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+ \item \textbf{r:} recursive directory option.
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\end{itemize}
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\vfill
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\pause
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@@ -166,7 +167,7 @@
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\end{itemize}
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\vfill
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\pause
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- \item rsync -aAXv --exclude={...} /* /backup folder
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+ \item rsync -aAXv --exclude=\{...\} /* /backup folder
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\begin{itemize}
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\item backup /* while following symlinks and preserving file properties.
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\end{itemize}
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@@ -290,15 +291,15 @@
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\begin{frame}
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\frametitle{Problems}
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- RAID can help in the event of a disk failure, but it doesn't protect us against \textbf{Silent Data Corruption}\\\pause
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+ RAID can help in the event of a disk failure, but it doesn't protect us against \textbf{Silent Data Corruption}.\\\pause
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To address this problem new generation filesystems like ZFS or Btrfs have been created. Classical features that we can find in this kind of filesystems are:
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\begin{itemize}
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- \item CopyOnWrite
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- \item Deduplication
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- \item Data \& Metadata checksums
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- \item Integrated RAID
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- \item Volume Management
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- \item Snapshots
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+ \item CopyOnWrite.
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+ \item Deduplication.
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+ \item Data \& Metadata checksums.
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+ \item Integrated RAID.
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+ \item Volume Management.
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+ \item Snapshots.
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\end{itemize}
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\end{frame}
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