STW TC1, User Manual

Page: 76 / 374

6 Software
User Manual 76/374
/mnt/usbdisks
All USB storage devices will be mounted to /mnt/usbdisks/.
For example:

/mnt/usbdisks/sda1

/mnt/usbdisks/sda2
/mnt/opt
Directory to store data logger configurations or server configurations.
/usr/local/bin
Contains STW specific binaries and scripts like cangen or nand_mount_sh.
/usr/local/sbin
Contains STW specific scripts.
/var/log
Contains the log files of the current activated TAF components, e.g. files with the syntax <Name of TAF
component>.log.
6.5.1.3 Overlay Filesystem
Overlay filesystem
The overlay filesystem is a feature that uses the mechanism of the UnionFS filesystem of the Linux kernel. For
details see http://unionfs.filesystems.org/ (see Link to UnionFS homepage -
http://unionfs.filesystems.org/ ).
If the system is updated with the latest BSP, all modifications will be overwritten. The root filesystem must be
customized again, which is an unnecessary workload and can cause wrong configuration of the devices that
are installed int he vehicle.
The overlay filesystem prevents data from being overwritten when an update to the latest BSP must be
performed. It also supports the procedure to restore user software and script settings after an update.