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3Functional Description
Write Operations
Figure 3-1 provides a high-level overview of the tape drive’s flow of data during a write operation.
SCSI bus
1
Data not to be compressed
2
Data to be compressed
Compression
circuit
Data buffer
3
Data written to tape
4
5
Rewrite (if necessary)
Tape
Figure 3-1 Data flow during a write operation
Data Flow and Data Compression
The
①If you select uncompressed format (8200 or 8500) for the tape, the data goes directly from the SCSI bus to the tape drive’s
②If you select compressed format (8200c or 8500c) for the tape, the tape drive looks at the currently active MODE SELECT parameters to see if data compression has been turned on.
Note: If you select 8200c format, data compression is always on; you cannot turn it off.
510504 | ||
| (Standard and XL) |
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