Quantum 1200 Series DAT Autochanger Guía de usuario descargar pdf (Pagina 87)

SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-45

8002h Total dropout error count

8003h Total servo tracking errors

9000h-

9007h

Without substantial delay errors by channel

9080h-

9087h

Write only: Possible delay errors assignable to specific

channels

Read only: Raw sub-block read errors by channel

Note: Many of these errors are write, not read, errors and

are not to be included in read error-rate calculations.

If these errors are used to try to identify bad

channels, the bad channel may be on either the

writing or reading drive.

Note: Parameter codes 00h, 01h, and 04h always return a value of 0.

DU Disable Update. When set to 0, indicates that the drive updates all log

parameter values. When set to 1, indicates that the drive does not update

the log parameter values except in response to a LOG SELECT command.

The drive sets this bit to 1 when accumulated values reach maximum. The

drive also returns this bit set to 1 if the host set the bit in the last LOG

SELECT command. Default is 0.

Note that for parameter types other than threshold and cumulative values,

this bit is always set to 0.

DS Disable Save. Not supported. Always set to 1.

TSD Target Save Disable. Not supported. Always set to 1.

ETC Enable Threshold Comparison. When set to 1, indicates that the drive

performs comparison to threshold. When set to 0, indicates that the drive

does not perform the comparison. The Control Mode Page of the MODE

SELECT command sets this bit set to 1. Default is 0.

Table 4-24. Log Parameters for Read / Write Error LOG SENSE Page —

Field Descriptions (Continued)

Field Name Description

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 293 294

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