An account on the ESRF Network Interactive Computing Environment (NICE) will be opened one week before your experiment is due to begin. Workstations are available in the Guest House (for e-mail only), in the Central Building and at the beamline (ask your local contact). The password will be maintained for four weeks after your experiment has finished. Data will be kept 30 days after the creation date.

Both the account and the data will then be removed by automatic procedure, without prior notice.

During an experiment, many giga bytes of data can be produced, most data reduction will start before you leave the ESRF. However, you will still want to back up your data.

There are several media for backing up and transporting data:

  • Firewire hard disks
  • Dat tapes (usually take 2 or 4 GBytes)
  • DLT tapes (can be written in the Central building, room ctb089, each tape holds 20 or 40 GBytes)
  • CD's (645 MBytes)
  • Large harddisk on a portable computer

Connections for "firewire" hard disks are available, which offer a high speed and simple way of transporting large quantities of data easily.

Portable computers can be connected to the ethernet at the beamline, giving a fast connection for data analysis.

Tapes are not generally recommended unless you know already roughly what you are doing (especially which kind of tape reader you have at your home laboratory).

Dat and Exabyte tapes can be created in the terminal room nearest the beamline (PluoC 202). It is best to use the tar command. First check which type of shell you are using : type echo $SHELL For csh and tsh, the command is:

tar cvf /dev/rmt/some_device files |& tee log_file

For ksh:

tar cvf /dev/rmt/some_device files 2>&1| tee log_file

These commands will show the progress of the back up on the screen and will produce a file with a list of the files backed up. There is usually a choice of the way in which the data is written for each tape device. Most people chose Berkeley format. DLT tapes can be written in the Central building, room ctb089. You must first check which type of reader you have at home. The command to write the tape will then be the same as for Dat tapes.

CD's can be written either at the beamline or in the terminal room. For the beamline, you will either use a writer under Windows (EasyCD) or under Linux (eroaster). In the terminal room, use cdrecorder. In each case, do not use the computer or network whilst the CD is being written. Remember that one CD only holds 645 MB of information and a single 2048x2048 image is about 8 MB.