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346 Fibre Channel Interface Manual, Rev. D
For write operations, logical blocks may be transferred directly to the cache memory. Good status may be returned
to the application client prior to writing the logical blocks to the medium. Any error that occurs after the Good status
is returned is a deferred error, and information regarding the error is not reported until a subsequent command.
1 The device server accesses the media in performing the command prior to returning Good status.
Read commands access the specified logical blocks from the media (the data is not directly retrieved from the
cache). In the case where the cache contains a more recent version of a logical block that the media, the logical
block writes to the media first.
Write commands do not return Good status until the logical blocks have actually been written on the media (the data
is not write cached).
Logical Block Address
The starting logical block address of the data to be affected by the xor operation.
Transfer Length
The number of logical blocks that will be transferred to the XDWrite target and the number of logical blocks that will be
affected by the xor operation.
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