4.4 Various Processes
When the cache is enabled, the buffer contains data transferred from the host with a write command. If a read command is issued to the sector address at this time, the ODD directly transfers data to the
The data listed below cannot be stored in the read cache.
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Data that is transferred to a host during
Data that is being read before hardware/software reset, DEVICE RESET command reception, or the
Data already stored before media is mounted
All buffer data is discarded under the following conditions:
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At hardware/software reset, DEVICE RESET command reception, or power- off
When media is ejected
When the FORMAT UNIT command is received
In idle mode
In standby mode
In sleep mode
When the system receives the MODE SELECT and SET FEATURES command that may change the reading mode
4.4.5.3 MO write cache
When the write cache is enabled, the ODD responds to the host with command end. This occurs when the data transfer is done with the WRITE (10), WRITE (12), or WRITE AND VERIFY command (hereafter "Write command" in this document).
When the Write command is issued consecutively, the ODD responds to the host with command end. This occurs if the specified sector logically contiguous to the sector specified by the previous command operation, at the end of the succeeding data transfer.
The ODD writes data kept in the buffer to media under the following conditions:
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When data can be written to media during data transfer processing with a write command or in the command wait state
When all data buffer segments are in use, and a command requiring a new segment is received
When the Eject switch is pressed
When the SYNCHRONIZE CACHE command is received
