Table 5-69Control Mode Page-Field Descriptions

 

 

 

 

Field Value

Default

 

Description

 

 

 

 

PS

1

 

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

GLTSD

0

 

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.

RLEC

0

 

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.

Queue

 

 

A value of 0 specifies that the drive orders the actual execution sequence with a SIM-

 

 

PLE statement.

Algorithm

0001b

 

Modifier

 

 

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-

QErr

00b

 

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.

DQue

0

 

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.

 

 

 

 

EECA

0

 

AEN enabled.

 

 

 

 

RAC

0

 

Report A Check Condition bit. Ignored by the drive.

 

 

 

 

SWP - Soft-

 

 

This file controls the drive’s write protection feature. If set, the drive returns check con-

ware Write

0

 

 

dition for the command with sense code/ASC/ASCQ - 07/27/00

Protect

 

 

 

 

 

 

 

 

 

RAERP

0

 

Ready AER Permission. Not supported by the drive.

 

 

 

 

UAAERP

0

 

Unit Attention AER Permission. Not supported by the drive.

 

 

 

 

EAERP

0

 

Error AER Permission. Not supported by the drive.

 

 

 

 

Ready AER

0

 

Not supported by the drive.

Holdoff

 

Period

 

 

 

Busy Timeout

FFFFh

 

Not supported by the drive.

Period

 

 

 

 

Extended Self

200h

 

Contains advisory data that indicates the approximate time, in seconds, required to com-

Test Comple-

 

plete an extended self-test when not interrupted by subsequent commands and no errors

tion Time

 

 

occur during execution of the self-test.

5-48 Maxtor Atlas 10K V