Storing data files on tape

To store data files on tape, the data must be associated to a SAM definition so that they can be tracked down. Prerequisites are to have the data contained in a single directory (no subdirectory structure), and a definition name (<defname> below) in mind. If the data is made of small files, it may be a good idea to compact it into a single or a few (possibly compressed) tarball file(s). Storage of data files is a two-step procedure.

Preliminary step: setup (sam4users):
```
setup fife_utils
```
Register the files into the SAM database and associate them to a SAM definition. To create a dataset (a SAM “definition”) from all the files in the directory /path/to/data/dir:
```
sam_add_dataset -e icarus -n <defname> -d /path/to/data/dir
```
SAM likes unique file names, so it will append some string at the end of the file names. If that is not desired, the option --no-rename will tell SAM to refrain from renaming (but I don’t know what happens in case of file name collisions):
```
sam_add_dataset -e icarus -n <defname> -d /path/to/data/dir --no-rename
```
Notes:
- It is suggested that the SAM definition starts with icarus (in case of merge with sbn…).
- After creating the SAM definition, it is recommended that a description be added to it to explain the content and purpose:
```
samweb modify-definition -e icarus --defname=<defname> --description="ICARUS PMT laser calibration data collected in January 2022"
```
archive the dataset on tape:
```
sam_archive_dataset -n <defname>
```