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)

 

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