Instructions

UM-0085-B09 DT80 Range User Manual Page 116
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To safely remove a USB device, you should always first issue the REMOVEMEDIA command. This command is also one
of the default options on the front panel function menu (P121). This command will:
1. suspend logging for any schedules that are configured to log directly to the USB memory device. This will cause
an error message to be returned, and the Attn LED will start flashing
2. make sure that all required information has been fully copied to the device and all files are closed
3. shut down the device. If the device has an indicator light, it should now be off
If you change your mind and want to keep using the device, you will now need to remove it and then re-insert it.
File Commands
The DT80 provides a number of general purpose file manipulation commands. These will work both for files stored on the
internal file system (B:) and an external USB memory device (A:), if one is present.
Command
Function
COPY source dest
reads the file source and creates a copy called dest. If dest is a folder name (i.e it ends
with a
\
character) then a file will be created with the same name as the source.
COPY source ftp-URI
uploads the file source to the FTP server pathname specified by ftp-URI
COPY ftp-URI dest
downloads the FTP server file ftp-URI and writes it to local file dest
RENAME source dest
rename file path source to file path dest
RENAME ftp-URI destfile
rename FTP server file path ftp-URI to file name destfile
DIR path
lists the contents of directory path. If path is not specified, B:\ is assumed.
DIR ftp-URI
list contents of FTP server folder path ftp-URI
DIRTREE path
lists the contents of directory path and all sub-directories. If path is not specified, B:\
is assumed.
TYPE source
displays the contents of file source. Use only with text files.
DEL source
deletes the file source. Use with care!
DELTREE path
deletes the directory path and all subdirectories. Use with care!
FORMAT A:
deletes all files from the USB memory device and re-creates the file system. Use with
care! For best performance, it is recommended that new USB devices be formatted in
the DT80 before use.
FORMAT B: DELETEALL
deletes all files from the internal flash drive and re-creates the file system. This
command would normally only ever be used if the DT80's internal compact flash card
was replaced. After executing this command it will be necessary to repeat the firmware
upgrade process in order to re-install system files (e.g. for the web interface) onto the
internal flash drive.
Note: These commands are for advanced users only. In most cases the standard DT80 commands (e.g. LISTD, DELD and so on)
are preferred. Furthermore, note that file names or locations may be subject to change in future firmware versions.
wildcards (e.g. "*.LOG") are not supported by any of these commands.
The DT80's default directory is B:\. So the command DIR JOBS is equivalent to DIR B:\JOBS.
For example, if you want to copy the DT80's system event log to a USB memory device for later analysis you could use:
COPY EVENTS\EVENT.LOG A:\EVENT_20060219.LOG
Done
Important: The DeTransfer program, which is often used to supervise the DT80, has a number of special commands that begin with a
\ (backslash) character. These are interpreted by DeTransfer and not sent to the DT80. In order to send a \ character from
DeTransfer, you need to enter a double backslash
(\\). For example, the above example would be entered into DeTransfer as follows:
COPY EVENTS\\EVENT.LOG A:\\EVENT_20060219.LOG
This rule applies to DeTransfer only; it does not apply to the "Text" window in DeLogger, nor to the web interface Command window.
Data Recovery
Prevention
If you accidentally remove a USB device while it is being accessed, then it is possible that the file system on the USB
device may be corrupted. (The same applies if you remove a USB memory device from a Windows computer without
selecting the "Safely Remove Hardware" option.)
The internal file system or USB memory device may also be corrupted if the logger suddenly loses all power while it is
writing to the disk.
To minimise the chance of data loss due to these causes, remember to:
• ensure that the battery link is in place. This will allow the DT80 to keep operating normally for a period of time,
in the event of an external power failure