Exabyte EXB-8505 8mm manual 9Logical block packing one physical block

2Recording Format

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:

Other formats:

Header and 1 logical block

Header 1,024 bytes

Header and 2 logical blocks

Header	512 bytes		512 bytes
	Header, 2 logical blocks, header, 1 logical block, and free space
Header	256 bytes	256 bytes	256 bytes	254 bytes free

2-byte header

Figure 2-9Logical block packing (one physical block)

2-14	EXB-8205 and EXB-8505	510504
	(Standard and XL)