/dev/nrmt1. The tape block size is 2880 bytes.
tape.listhe FITS headers for all the files of the tape mounted on device
/dev/nrmt1. The tape blocking factor is 10, the tape’s blocksize is 28800 bytes.
/dev/rmt/0nto the file
tape.lis. The tape blocking factor is 2, i.e. the tape’s blocksize is 5760 bytes.
/dev/nrst2. The command prompts you for the file limits and tape blocking factor.
Prompting is directed to the standard error, so that the listings may be redirected to a file.
If the blocking factor is unknown it is possible to obtain only a part of the headers and some of the FITS data. Unless the FITS file is small, it is usually safe to set Parameter BLOCK higher than its true value.