Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 132)

8.1 About This Command

The LOG SELECT command allows you to manage the counters that

the CTS maintains about its write and read error recovery operations.

These counters, described in Table 8-2 on page 8-8, include the

following:

Total Number of Rewrites and Total Number of Rereads

Total Errors Corrected

Total Times Errors Processed

Total Bytes Processed

Total Unrecoverable Errors

You can use the LOG SELECT command to reset these counters or to

specify threshold and cumulative values for each counter. To test the

CTS, you can reset the counters, perform the read or write operations

you want to test, then issue a LOG SENSE (4Dh) command to check

the values of the counters (refer to Chapter 9 for information about

the LOG SENSE command).

You can also use the LOG SELECT command to specify if and when

you want to be notified about changes to the counters. (For example,

you might want the CTS to return Unit Attention when a counter

reaches its threshold value.)

Important

If you want the CTS to return Unit Attention to notify you

about changes to the counters, first issue a MODE SELECT

(15h) command and send the Control Mode page (Page

Code=0Ah) with the Report Log Exception Condition (RLEC)

bit set to 1. Refer to Chapter 10 for more information.

Figure 8-1 shows the general structure of the LOG SELECT command.

The LOG SELECT command enables you to change counter values on

two different pages: the Write Error Counter page and the Read Error

Counter page. With each LOG SELECT CDB, you send a parameter

list for each page on which you are changing values. Each parameter

list has a Parameter List Header that indicates the number of bytes

that follow the header as log parameters. You specify a log parameter

for each value on the page that you want to change.

8-2

EXB-8205 and EXB-8505

(Standard and XL)

510503

8 LOG SELECT (4Ch)

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