VLBI delay calibration runner does not determine available storage correctly

[lonbar]

Describe the bug The runner run_lofar-vlbi-delay-calibration.sh may not recognise that a sufficient amount of space is available

!! WARNING !!
!! WARNING !! only 626T of available disk space detected!
!! WARNING !! at least 15.0T is recommended for a dysco-compressed 8 hour dataset.
!! WARNING !!

To Reproduce Run flocs/runners/run_lofar-vlbi-delay-calibration.sh with appropriate settings. The above was run on COSMA node m5266.

Expected behaviour If enough storage is available the warning above should not appear.

Additional information (if applicable or known):

• The FLoC commit used was bde82f17.
• The FLoC singularity image used was flocs_v5.0.0_sandybridge_sandybridge.sif.
• The infrastructure was COSMA node m5266.

[tikk3r]

That does seem like a bug and a classic "seems to work fine on my laptop". I'll have to look into it.