[Info-vax] VAX 6000 on Young Sheldon

[Dennis Boone]

 > Hmm.  In 50+ years of data processing/IT/systems work, I've never heard of
 > tapes having (nonprogrammatic) CRC, that is, anything generated by the
 > hardware/firmware rather than the backup program.

Seven track tape had both frame and longitudinal parity.

Nine track had both parities, plus a crc character.  Data, three
frame times empty, crc frame, three frame times empty, lrc, irg.

See e.g. http://bitsavers.org/pdf/kennedy/9100/Kennedy_Model_9100_192-9100-003_75ips_Operation_and_Maintenance.pdf

De