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222 Fibre Channel Interface Manual, Rev. D
The buffer full ratio is taken to be a percentage of the smaller of:
the buffer size
or
the remaining transfer length.
For example, if the buffer full ratio is 80h (128 Decimal) (indicating a 128/256 or 50% value), the transfer length of a read
command is 20h blocks, and the buffer size is 30h blocks, the arbitration begins when 10h blocks (50% of the transfer
length of 20h blocks) is in the buffer.
Bus Inactivity Limit
Not supported (bytes 4 and 5).
Connect Time Limit
Not supported (bytes 8 and 9).
DImm (Disconnect Immediate)
Not supported.
Disconnect Time Limit
Not supported (bytes 6 and 7).
DTDC (Data Transfer Disconnect Control)
Not supported.
EMDP (Enable Modify Data Pointers)
Not supported.
Maximum Burst Size
The maximum amount of data that the drive will transfer in a Fibre Channel sequence. For performance, the maximum
burst size should be a size that fits in a cache segment.
The disc drive defaults to an integer multiple of 512 that is less than or equal to a segment size. The length of the sequence
is an integer multiple of the frame size that is less than or equal to the maximum burst size.
This value is expressed in increments of 512 bytes (e.g., a value of one means 512 bytes, two means 1024 bytes, etc.).
The data length for a command may span multiple sequences.
Page Code
02h Disconnect/Reconnect Control page code.
Page Length
0Eh The length of the Disconnect/Reconnect Control page (in bytes). If the allocation length is too small to transfer all of
the page, the page length is not adjusted to reflect the truncation.
PS (Parameter Savable)
This bit is not used with the Mode Select command.
1 The page 02h parameter data is savable.
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