Quantum 1200 Series DAT Autochanger Guia do Utilizador descarregar pdf (Página 121)

SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-79

Table 4-48. Disconnect / Reconnect MODE SELECT Page — Field Descriptions

Field Name Description

PS Parameters Savable. For MODE SELECT, must be set to 0.

SPF SubPage Format. Always set to 0. Indicates that the drive uses the page_0

page format.

Page Code Identifies the type of MODE SELECT page being transferred. A value of 02h

identifies this as the Disconnect / Reconnect Page.

Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1. The length

is returned in MODE SENSE commands and must subsequently be set to the

same value when performing MODE SELECT. If the drive receives an

unexpected page length value, it returns a CHECK CONDITION status,

Sense Key set to ILLEGAL REQUEST.

Buffer Full Ratio Not supported. The drive ignores all values.

Buffer Empty Ratio Not supported. The drive ignores all values.

Bus Inactivity Limit Not supported. The drive ignores all values.

Disconnect Time Limit Not supported. The drive ignores all values.

Connect Time Limit Not supported. The drive ignores all values.

Maximum Burst Size Indicates the the maximum amount of data that will be transferred without

disconnecting, in units of 512 bytes. The default value is 80h for 64 KBytes.

EMDP Enable Modify Data Pointers. Must be set to 0.

Fair Arbitration Not supported. Must be set to 0.

DIMM Disconnect Immediate. Must be set to 0.

DTDC Data Transfer Disconnect Control. Must be set to 0.

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