Ciprico Rimfire 3880 User Manual Page 100

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21020285 D User’s Guide
Chapter 5 Initiator Mode Pass-through Commands
Page 5 - 16 Initiator Pass-through Status Block Format
Default Sense Bytes
You will receive the default eight bytes of Sense data if you place a zero in the
Sense Count field and zeroes in all fields of the Selected Sense Bytes of the
Unit Options or Extended Unit Options Board-control command.
The default values returned are:
Only one Status Block is required to return the default Sense Bytes.
Up to 32 Sequential Sense Bytes
This option is chosen by placing a number (up to 32) in the Sense Count field
of either the Unit Options or Extended Unit Options command. The Selected
Sense Bytes fields are ignored.
This is useful if all pertinent information occurs within the first 32 bytes of
Sense data returned from your device.
If you enable more than eight bytes of sequential Sense data to be returned,
they will be returned in multiple Status Blocks. For example, the first sixteen
would appear in this order:
Byte Memory Address
Offset + 0 Offset + 1 Offset + 2 Offset + 3
Command Identifier
Reserved SCSI Status Error Flags
0 = Class/Code 1 = Segment 2 = SCSI Flags 3 = Info Byte
4 = Info Byte 5 = Info Byte 6 = Info Byte 7 = Ex Length
Table 40: Default Ordering of Sense Bytes
Byte Memory Offset
Offset + 0 Offset + 1 Offset + 2 Offset + 3
Command Identifier
Reserved SCSI Status Error Flags
0 = Class/Code 1 = Segment 2 = SCSI Flags 3 = Info Byte Sense Byt
in Status
Block #1
4 = Info Byte 5 = Info Byte 6 = Info Byte 7 = 8H
Command Identifier
Reserved SCSI Status Error Flags
8 9 10 11 Sense Byt
in Status
Block # 2
12 13 14 15
Table 41: Ordering of 1st 16 Sequential Sense Bytes
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