IBM IC35L036UWDY10 - Ultrastar 36.7 GB Hard Drive Specifications page 109

! DIMM (Disconnect Immediate) of one indicates that the drive is required to disconnect after receiving
a command prior to starting a data phase. A DIMM of zero indicates that the drive may transfer data
for a command immediately after receiving it without disconnecting. Whether or not the drive does so
depends upon the workload and the settings of the other parameters in this mode page.
Note: Priority commands do not disconnect from the SCSI bus.
! DTDC (Data Transfer Disconnect Control) field defines further restrictions for when a disconnect is
permitted.
- A value of 00b indicates that DTDC is not used by the drive and the disconnect is controlled by the
other fields in this page.
- A value of 01b indicates that the drive shall not attempt to disconnect when the data transfer of a
command has started until all data which the command is to transfer has been transferred. The
connect time limit and bus inactivity limit are ignored during the data transfer.
- The value 10b is reserved.
- A value of 11b indicates that the drive shall not attempt to disconnect when the data transfer of a
command has started until the command is complete. The connect time limit and bus inactivity limit
are ignored when data transfer has started.
Note: If DTDC is nonzero and the maximum burst size is nonzero, a CHECK CONDITION status will
be returned. The sense key shall be set to ILLEGAL REQUEST and the additional sense code set to
ILLEGAL FIELD IN PARAMETER LIST.
! Fair arbitration If the Fair arbitration filed is set to 000b, the drive shall not use arbitration fairness
during normal arbitration. If this field is set to a nonzero value, the drive shall use arbitration fairness
during normal arbitration.
Both the Read Buffer Full Ratio and the Write Buffer Empty Ratio pertain to the current active notch. For
each active notch as defined in page 0Ch there are separate Read Buffer Full Ratios and Write Buffer
Empty Ratios. When the active notch is set to zero, the values are applied in mode page 0Ch across all
notches.
Ultrastar 146Z10 hard disk drive specifications
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