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No, you can extend by 2 years the lifetime on disk of your raw data by selecting the most frequently accessed runs. This selection can be done with the file manager in the experiment web portal.

By which date do we need to select runs with the file manager to increase the lifetime on disk of our data?

See the proposed deadlines dates here https://confluence.slac.stanford.edu/display/PCDS/Phase+1+Dates

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You may, but try to be a good citizen by selecting only the most frequently used files and by restoring from tape what the runs you rarely use.

What will happen to the data under the scratch folder?

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The scratch directory is meant to provide a large, short term disk storage (6-months) for intermediate results. Users can write to this directory during data analysis development and later on move the most important results to res. Please do not store under the scratch folder data that you cannot recreate because this directory is not backed up. This folder doesn't have a quota.

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Yes, but only for experiments taken after April 2011 and try to keep the request requested date within 3 months from the proposed deadline.