Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 255)

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16.2 Field Definitions

Bytes 03 and 04 - Allocation Length

The Allocation Length field specifies the number of bytes that the

initiator has allocated for the return of RECEIVE DIAGNOSTICS

RESULTS data.

If you are using the command to obtain diagnostic data, the

number of bytes of diagnostic data available from the CTS

dependsonthetypeofSENDDIAGNOSTICtestthatwas

performed (see Section 16.3 for more information).

To receive all available diagnostic information, specify a value for

the Allocation Length field that equals the Page Length for the

diagnostic page requested plus 4 bytes. A value of 0 for the

Allocation Length field indicates that no diagnostic data will be

returned and is not an error.

If you are requesting a trace of SCSI and servo activity, specify

500h for the Allocation Length field.

The CTS terminates the Data In phase when the number of bytes

specified in the Allocation Length field has been transferred or when

all available data has been transferred to the initiator, whichever is

less.

Byte 05, Bit 7 - TD (Trace Dump)

This bit indicates whether you are requesting diagnostic data or a

trace dump, as follows:

0 – Return diagnostic data (see Section 16.3 for more information).

1 – Return a trace of SCSI and servo activity (see Section 16.5 for more

information).

Byte 05, Bit 6 - VU (Vendor Unique)

There is no vendor unique definition for this bit.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

16-3

16 RECEIVE DIAGNOSTIC RESULTS (1Ch)

1 2 ... 250 251 252 253 254 255 256 257 258 259 260 ... 445 446

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