Maxtor ATLAS 10K III User Manual
Page 134
SCSI Description
5-70
Maxtor Atlas 10K III
DRC
0
Disable Reassign Copy. When this field = 0, the disk drive copies best-
guess data to the new physical block during REASSIGN BLOCKS command
processing. If the disk drive cannot successfully read the original block’s da-
ta, the disk drive sets a Forced Error flag in the replacement block’s flags.
When this field = 1, the disk drive does not copy a block’s data and obtain
best-guess data; it first reassigns the block and then writes data to the
block. Until it is overwritten by a subsequent WRITE command, a reassigned
block’s data is undefined and its Forced Error flag is set.
NMAIOP
0
No MAIOP. When this field = 1, MAIOP is disabled.
DNTRA
0
Disable Next Track Read Ahead. Do not prefetch next track.
Soft Fault
0
When this field is set = 1, the disk drive’s FAULT led illuminates.
ManCal
0
Manual Calibration. When set = 0, the disk drive runs calibration and diag-
nostic procedures periodically.
When set = 1, calibrations occur only as a result of a REZERO UNIT com-
mand.
Note that this bit is not saved by MODE SELECT when the value of the SP
field is 1.
DPER
1
Disable Post Error Recovery. When set = 1, disables Post Error Recovery
(refer to Read-Write Error Recovery Page, Section 5.17.3.3).
FAxRE
1
Force AxRE where x = W (WRITE) or R (READ)
When set = 0, the settings of AWRE/ARRE are as set in Mode Page 01h
(Read-Write Error Recovery Page).
When set = 1, Automatic WRITEs or READs are forced, even if the related
fields of Mode Page 01h are = 0.
QDER
0
Quick Disk Error Recovery. When set = 0, disk error recovery has no
20msec limit.
When set = 1, disk error recovery time allotted is less than 20msec.
DFC
0
Disable Format Certification. If set = 1, format certification is disabled re-
gardless of the value of the DCRT bit in the FORMAT Command’s parameter
header.
Read Ahead
Disable
0
If set = 1, disables READ ahead.
Enable
Double Ack
Filter
0
If set = 1, enables the double acknowledge filter.
ESPDis
0
ESP Disabled. If this field = 1, ESP (anticipatory READ) is disabled.
DFRCSU
0
Disable Filling of Revector Cache on Spin-Up. When this field = 1, revec-
toring cache is not refilled on spin-up.
AIP Gen
Disable
0
Asynchronous Information Protection (AIP) Generation Disabled. When =
0, drive places AIP information on the upper byte of data during asynchro-
nous information phases, regardless of the setting of “AIP Check Enabled.”
When set = 1, AIP generation is disabled.
AIP Check
Enabled
0
AIP Checking Enabled. When = 0, the drive will ignore AIP information for
this initiator. When = 1, the drive is able to validate incoming AIP informa-
tion on upper byte of data during asynchronous information phases and can
generate errors on bad information.
NOTE
This bit is maintained uniquely for each unique initiator ID that senses or se-
lects it. All initiators that want to participate in AIP must set this bit for
themselves.
AIP Capable
1
When = 0, indicates that drive does not support AIP. If = 1, indicates drive
is capable of AIP.
LogPgB
0
When this field = 0, “total bytes read/written” field on Log Page 02h and
03h reported as number of
D[VGU. When = 1, field is reported as number of
DNQEMU.
(KGNF
&GHCWNV
&GUETKRVKQP