In case you didn't already know, the TS-7260 is an ARM single board computer built by Technologics Systems
. They have a fair bit of info on their web site, and also have a forum dedicated to their product line, which is fairly helpful and active.
From experience with others of their products, they tend to like the JFFS2 filesystem for storage on flash media. It is possible that the OEM that used this board also used that format on the USB drive. Most desktop oriented Linux's don't seem to have JFFS2 support by default, so you usually have to add it.
I could figure out from the directory structure that the acquisition software is calles SEISLOG but I can't start it because the commands are not supported by the OS.
This sounds a bit suspicious. What do you mean by this? If the software runs, it must be possible to launch it somehow. If it gets launched automatically at boot time, there is some code that launches it, probably in /etc/init.d
somewhere. What do you really mean by 'the commands are not supported by the OS'?
It is also possible, although rare, that the software does not use a filesystem on the media, but accesses the USB device directly. Ironically, I did this myself once on some software I wrote that read data from a seismology instrument, although the media was a floppy disk and the CPU was a few orders of magnitude weaker.