Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 95)

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101

When you insert a data cartridge into the CTS, the CTS returns Check

Condition status with the sense key set to Unit Attention (6h).

However, if you insert a data cartridge and autoloading is prevented

(that is, autoload was disabled with a MODE SELECT command and

a LOAD (1Bh) command was not received), the CTS returns Check

Condition status with the sense key set to Not Ready (2h).

Clearing the Unit Attention Condition

The Unit Attention condition persists for each initiator until that

initiator issues any command other than INQUIRY (12h) or REQUEST

SENSE (03h).

First Command Received after Unit Attention Occurs

If the first command received after a Unit Attention condition occurs

is an INQUIRY or REQUEST SENSE command, the CTS executes the

command, reports any pending status, and preserves the Unit

Attention sense data. If the first command received after a Unit

Attention condition occurs is any other command, the CTS does not

execute the command and returns Check Condition status with the

sense key set to Unit Attention (6h).

Next Command Received after Unit Attention Reported

If the next command after the Unit Attention condition has been

reported with Check Condition status is a REQUEST SENSE or an

INQUIRY command, the CTS executes the command and preserves

the Unit Attention sense data. If, however, the next command after

the Unit Attention condition has been reported with Check Condition

status is any other command, then the command is executed and the

Unit Attention sense data is cleared.

Note: If multiple Unit Attention conditions occur before the initiator

selects the CTS, only the sense data for the latest Unit

Attention condition is presented.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

3-33

3 Implementing CTS Operations

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