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In 8200 format, each physical block contains one header and one
logical block. In 8200c, 8500, and 8500c formats, each physical block
includes a 14-byte header that can define only two logical blocks. If
the physical block contains more than two logical blocks, the tape
drive adds an additional two-byte header in the data field for each
logical block after the second one.
8200 format: Header 1,024 bytes
Other formats:
Header 512 bytes 512 bytes
Header 256 bytes 256 bytes 256 bytes 254 bytes free
Header and 1 logical block
Header and 2 logical blocks
Header, 2 logical blocks, header, 1 logical block, and free space
2-byte header
Figure 2-9 Logical block packing (one physical block)
2-14 EXB-8205 and EXB-8505 510504
(Standard and XL)
2 Recording Format