11. Data Back up
10.1. Backup to USB-drive during beamtime
If you bring a USB-drive, you may sync the data onto it during the beamtime. We provide a dedicated PC for this purpose, which is running debian. It is advisable to bring a drive which is known work fast on Linux systems, as some chipsets might be too slow to keep up with the speed at which you take data. Please also note, that ExFAT is currently not supported. FAT32, NTFS, ext4 should all work fine, for other file-systems we can not give any guarantee.
There is a script prepared, which will continuously sync the data onto your hard-drive. Source and destination path have to be adapted beforehand. Usually, your local contact will help you with this. Instructions can also be found in the hutch, next to the printer.
There are to possibilities as were to copy your data from:
- The core file system /asap3/petra3/gpfs/p11/<YEAR>/data/<BEAMTIME>. This is the way we recommend as it has several advantages. You will need to log in with a DESY Science Account which was added to the authorized list by the PI.
- The beamline file system /gpfs/current/. You may log in as p11user to do this. Any data resulting from manual processing performed on the Maxwell resource will not be visible here and thus not be contained in your backup. As soon as the next user group starts and your beamtime is closed, you will have to stop copying.
10.2. Download your data during or after the beamtime via NFS
Data are available for download via ftp protocol on the Gamma portal as it is described in here. You need a DESY-Door-Account, which has to be added to the authorized list by the PI, to make use of this.
10.3. Download your data during or after the beamtime using Globus
https://www.globus.org/data-transfer
todo: Infos about our endpoint and how to use it.