Apparently the disk pack NRAO-203 had excess data written.
Project bb240z was recorded on the primary date of April 8,
which is all bogus data, because the project was actually
observed on the backup date of April 10, which is also
recorded on NRAO-203.
The system was originally set up to run on the primary date,
but after the decision was made to do the secondary date instead,
the station computer was not restarted in time to pick up
the revised OBSERV.TX file.  It looks like about 1100 GB were
written before the station computer was stopped and restarted.

So NRAO-203 has about 1100 GB of bogus data as well as
the real data for bb240z.
At the beginning of NRAO-203 is the tail end of bb240y ( about 900 GB).

Sorry about the mixup.

-- frank