READ 6 | 08h |
Transfer Length blocks of data are transferred to the host, starting from the current logical position specified by Logical Block Address. Any spacing performed to locate to the specified block address is performed with mark counting disabled.
Requests falling within the first 250 kilobytes of data on tape will be performed with very little delay (less than 2 seconds) because the drive caches this data at load time.
Illegal Field | Fixed Bit | Flag Link |
Bad LUN | Reservation | Deferred Error |
Unit Attention | Media Access | Diagnostic Status |
Command descriptor block:
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| 7 | 6 | 5 | 4 |
| 3 | 2 | 1 | 0 |
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| 0 |
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| Operation | Code (08h) |
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| 1 | (MSB) |
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| Logical Block Address |
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| 3 |
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| 4 |
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| Transfer Length |
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| 5 |
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| Control |
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CDB fields:
Logical Block Address | Specifies the block address from which to read. The tape drive will space to this |
| block before reading data. |
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Transfer Length | The number of blocks of data to return. Each |
| size. This size is automatically set in the mode data’s fixed block length while in |
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Read 6 Specific status:
See the “Read specific status:” on page 108.
Residue Information:
See the “Residue information:” on page 108 for the normal Read command.
Commands
READ 6