Maxtor ATLAS 10K IV User Manual page 115

Table 5-71
Field Value Default
PS 1
GLTSD 0
RLEC 0
Queue
Algorithm 0001b
Modifier
QErr 0
DQue 0
EECA 0
RAC 0
SWP - Soft-
ware Write 0
Protect
RAERP 0
UAAERP 0
EAERP 0
Ready AER
Holdoff 0
Period
Busy Timeout
FFFFh
Period
Extended Self
Test Comple- 496h
tion Time
NOTES:
If the Queue Algorithm Modifier specifies restricted re-ordering (0000b), commands are not allowed to execute
concurrently. If this field specifies unrestricted re-ordering (0001b), concurrent I/O execution is allowed.
Control Mode Page-Field Descriptions
Parameters Savable. This bit is only used with the MODE SENSE command. A returned
value of 1 indicates that the target is capable of saving the page in a non-volatile, ven-
dor-specific location. The bit is reserved with the MODE SELECT command.
Global Logging Target Save Disable. If this bit = 1, the ability to save log ages to disk
is disabled. If a LOG SELECT with the SP bit is received by the drive, the current cu-
mulative values will be cleared. The on-disk values will not be changed. If a LOG
SENSE with the SP bit set is received by the drive and the GLTSD bit is set and the unit
is ready, the last LOG counter values written to disk will be returned (not the current
cumulative values).
If a STOP UNIT command or a LOG SENSE command with the SP bit set is issued to
the drive, the cumulative values of the Log Counters page will be written to disk. A
LOG SENSE command will return the cumulative values since the counters were
cleared, not since the drive was powered on.
Report Log Exception Condition. The drive does not report log exception conditions.
Not supported by the drive.
This field specifies restrictions on the algorithm used for re-ordering commands that are
tagged with the SIMPLE message.
A value of 0 specifies that the drive orders the actual execution sequence with a SIM-
PLE statement.
A value of 1 (Unrestricted Re-ordering Allowed) specifies that the drive can re-order
the actual execution sequence of the commands with a SIMPLE in any manner. Any
data integrity exposures related to command sequence order are explicitly handled by
the initiator through the selection of appropriate commands and queue tag messages.
Queue Error Management. This field controls the drive's processing of queued com-
mands when a Contingent Allegiance (CA) condition or Extended Contingent Alle-
giance (ECA) is cleared. Processing of queued commands is resumed when a CA/ECA
condition is cleared.
Disable Queue. When set to the default value of 0, the drive supports tagged command
queuing.
When the Disable Queue bit is set to 1, tagged command queuing is disabled. A subse-
quent tagged message from the initiator is rejected with a MESSAGE REJECT message
and the I/O process is executed as an untagged command.
AEN enabled.
Report A Check Condition bit. Ignored by the drive.
This file controls the drive's write protection feature. If set, the drive returns check con-
dition for the command with sense code/ASC/ASCQ - 07/27/00
(EC_DATA_WR_PROTECT),
Ready AER Permission. Not supported by the drive.
Unit Attention AER Permission. Not supported by the drive.
Error AER Permission. Not supported by the drive.
Not supported by the drive.
Not supported by the drive.
Contains advisory data that indicates the approximate time, in seconds, required to com-
plete an extended self-test when not interrupted by subsequent commands and no errors
occur during execution of the self-test.
Description
Maxtor Atlas 10K IV
SCSI Description
5-49