Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 84

Command Specifications
If the IDD performs rounding processing ("rounding up" or "rounding down") of parameter values
specified by the INIT, in some cases a "CHECK CONDITION" status (RECOVERED ERROR [=1] /
Rounded parameter [37-00]) is reported, and in some cases it is not reported.
"CHECK CONDITION" status is reported is determined by the type of "rounding up" or "rounding
down" and the conditions.
If the INIT would like to confirm that the IDD is implementing rounding processing, it issues a MODE
SENSE or MODE SENSE EXTENDED command after issuing this command and reads the values for
the "Current" parameters, then compares them with the parameter values sent in the MODE SELECT
command.
Parameter fields which are the object of rounding processing are explained in the descriptions of each
page descriptor in this item.
Figure 3.9 shows the data configuration of the parameter list transferred by the INIT in this command.
The parameter list is configured from header 4 bytes in length followed by a block descriptor with a
length of 8 bytes. This is followed by one or more page descriptors, or, when there is no block
descriptor the 4-byte header is followed by one or more page descriptors. The INIT may transfer a
header only, or the header and block descriptor only without the page descriptor added.
Header
Bit
7
Byte
0
1
×
2
3
Block Descriptor
Bit
7
Byte
0
1
2
3
4
5
6
7
3-22
6 5 4
X'00' (Media Type)
×
0 0
X'00' or X'08' (Product Descriptor Length)
6 5 4
Data Block Count (MSB)
Data Block Count
Data Block Count
Data Block Count (LSB)
X'00'
Data Block Length (MSB)
Data Block Length
Data Block Length (LSB)
3 2
X'00'
0 0
3 2
Whether or not a
1 0
0 0
1 0
C141-C010