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EWIO
2
User Manual
V 1.1 | Stand 10/2020
Seite 44 von 96
METZ CONNECT GmbH | Im Tal 2 | 78176 Blumberg | Germany
Tel. +49 7702 533-0 | Fax +49 7702 533-433
For additional documentations look at www.metz-connect.com
When using the SD card as the boot medium, the actions offered affect the entire storage
medium. When copying from Flash to SD card and vice versa, from SD card to Flash, the
device software, all device settings, stored measured values and I/O events and, if available,
also the user data are copied. The original content of the target memory is lost. Only the files
stored in the /data directory on the SD card are retained when copying from Flash to SD card
and are not copied when copying from SD card to Flash. Files in this directory are created by
the CSV data server in the operating mode "Save to SD card" and when saving to SD card, see
Chapter
If an SD card is available, it is always available for applications and other use under
/media/sd-card. This is independent of whether the system was booted from SD card or flash
memory. Other mount points where the SD card may also be available depend on the boot
medium and should not be used for user applications.
The files can be downloaded or deleted in the "Data Server and Backup Files" area. Here one or
more files can be selected, whereby several files are packed into an archive (.tar.bz2). This is
done by clicking on the files or the action fields "Select all" and "Invert selection".
When using the SD card as a staging method for the CSV data server, the selected data is
stored in the /data directory of the SD card at the selected staging interval. Unlike the other
deployment types, saving to the SD card does not delete the data from the previous
deployment. The data provided on the SD card accumulates over time and can be evaluated in
its entirety.
Note !
USB storage devices can also be used as backup or data server media. Here the
same basic conditions apply as for the SD card. All files are stored in the /data
directory on the USB memory.
If a USB memory is available, it is always available under /media/usb for
applications and other use. Other mount points, where the USB memory may also be
available, should not be used for user applications.
Using the USB memory as a boot medium is not possible for safety reasons.