Flash-Memory: Update Flash-Filesystem Presentation

Update the exercises in the presentation and separate the cleanup
sections.

Signed-off-by: Holger Dengler <dengler@linutronix.de>

1 files changed, 55 insertions, 28 deletions

diff --git a/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex b/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex
index 5de794f..718965d 100644
--- a/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex
+++ b/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex
@@ -17,6 +17,7 @@
 \subsubsection{Emulation}
 \begin{frame}[fragile]
 \frametitle{Emulating flash devices}
+Exercise:
 \begin{lstlisting}
 $ sudo modprobe nandsim
 $ cat /proc/mtd 
@@ -56,17 +57,26 @@ mtdparts=edb7312-nor:256k(ARMboot)ro,
 
 \begin{frame}[fragile]
 \frametitle{Using JFFS2}
+Exercise:
 \begin{lstlisting}
 # Create JFFS2 image
-$ mkfs.jffs2 -e 131072 \
-    -d source_directory \
-    -o jffs2.img
+$ /usr/sbin/mkfs.jffs2 -e 131072 \
+             -d source_directory \
+             -o jffs2.img
 # Erase flash partition
-$ flash_erase -j /dev/mtd0 0 0
+$ sudo flash_erase -j /dev/mtd0 0 0
 # Write jffs2 image
-$ nandwrite /dev/mtd0 jffs2.img
+$ sudo nandwrite -p /dev/mtd0 jffs2.img
+# Load mtdblock module
+$ sudo modprobe mtdblock
 # Mounting the image
-$ mount /dev/mtdblock0 /mnt
+$ sudo mount -t jffs2 /dev/mtdblock0 /mnt
+\end{lstlisting}
+Clean-up:
+\begin{lstlisting}
+# Unmount the image and erase flash partition
+$ sudo umount /mnt
+$ sudo flash_erase -j /dev/mtd0 0 0
 \end{lstlisting}
 \end{frame}
 
@@ -96,13 +106,14 @@ root=/dev/mtdblock0 rootfstype=jffs2
 
 \begin{frame}[fragile]
 \frametitle{Using UBIFS}
+Exercise:
 \begin{lstlisting}
-# 1) Attaching UBI to an MTD device
-modprobe ubi
-ubiattach ubiattach -m 0
-# or
-modprobe ubi mtd=0
-# 2) Gathering some information
+# 1) Loading module and attach UBI to MTD device
+$ sudo modprobe ubi
+$ sudo ubiattach ubiattach -m 0
+# or: 1a) Specify the MTD device during module load
+$ sudo modprobe ubi mtd=0
+# 2) Gathering some information:
 $ dmesg
 UBI: attaching mtd0 to ubi0
 UBI: physical eraseblock size:   16384 bytes (16 KiB)
@@ -112,21 +123,29 @@ UBI: sub-page size:              256
 UBI: VID header offset:          256 (aligned 256)
 UBI: data offset:                512
 [...]
-# 3) Creating a volume
-$ ubimkvol /dev/ubi0 -N myvolume -s 64MiB
+# 3) Creating an UBIFS image
+$ /usr/sbin/mkfs.ubifs -r test -m 512 -e 15872 \
+              -c 8450 -o ubifs.img
 \end{lstlisting}
 \end{frame}
 
 \begin{frame}[fragile]
 \frametitle{Using UBIFS}
+Exercise (cont.):
 \begin{lstlisting}
-# 4) Creating an UBIFS image
-$ mkfs.ubifs -r test -m 512 -e 15872 \
-   -c 8450 -o ubifs.img
+# 4) Creating a volume
+$ sudo ubimkvol /dev/ubi0 -N myvolume -s 64MiB
 # 5) Writing the image
-$ ubiupdatevol /dev/ubi0_0 ubifs.img
+$ sudo ubiupdatevol /dev/ubi0_0 ubifs.img
 # 6) Mounting UBIFS
-$ mount -t ubifs ubi0:myvolume /mnt/
+$ sudo mount -t ubifs ubi0:myvolume /mnt/
+\end{lstlisting}
+Clean-up:
+\begin{lstlisting}
+# Unmounting image, detach UBI from MTD device, and erase flash partition
+$ sudo umount /mnt
+$ sudo ubidetach -m 0
+$ sudo flash_erase -j /dev/mtd0 0 0
 \end{lstlisting}
 \end{frame}
 
@@ -147,17 +166,23 @@ vol_flags=autoresize
 
 \begin{frame}[fragile]
 \frametitle{UBI: Create flash images}
+Exercise:
 \begin{lstlisting}
 # 1) Create the ubi image
-ubinize -o ubi.img -m 512 -s 256 -p 16384 ubinize.cfg
-# 2) erase the flash partition
-flash_erase /dev/mtd0 0 0
-# 3) Write the image
-nandwrite /dev/mtd0 ubi.img
-# 4) Attach UBI
-ubiattach -m 0
-# 5) Mount UBIFS
-mount -t ubifs ubi0:myvolume /mnt/
+$ /usr/sbin/ubinize -o ubi.img -m 512 -s 256 -p 16384 ubinize.cfg
+# 2) Write the image
+$ sudo nandwrite /dev/mtd0 ubi.img
+# 3) Attach UBI
+$ sudo ubiattach -m 0
+# 4) Mount UBIFS
+$ sudo mount -t ubifs ubi0:myvolume /mnt/
+\end{lstlisting}
+Clean-up:
+\begin{lstlisting}
+# Unmounting image, detach UBI from MTD device, and erase flash partition
+$ sudo umount /mnt
+$ sudo ubidetach -m 0
+$ sudo flash_erase -j /dev/mtd0 0 0
 \end{lstlisting}
 \end{frame}
 
@@ -169,7 +194,9 @@ ubi.mtd=0 root=ubi0:myvolume rootfstype=ubifs
 \end{verbatim}
 \end{frame}
 
+\subsection{}
 \begin{frame}
+\frametitle{References}
 \begin{thebibliography}{1}
 \bibitem{UBIFS} http://mytechrants.wordpress.com/2010/01/20/ubiubifs-on-nandsim/
 \end{thebibliography}