Quantum SuperLoader 3 Guide de l'utilisateur télécharger pdf (Page 138)

Chapter 2 Media Changer Commands

Request Sense Command (03h)

Quantum SuperLoader 3 Software Interface Guide 122

Request Sense Command (03h)

The REQUEST SENSE command causes the media changer to transfer

detailed sense data to the initiator.

Figure 73 Request Sense

Command Descriptor Block

Figure 74 Request Sense

Command Data

The sense data is valid for a CHECK CONDITION or RESERVATION

CONFLICT

status returned on the previous command. The sense data

bytes are preserved by the media changer until retrieved by a

REQUEST

SENSE

command, or until the receipt of any other command from the

same initiator, though some commands, such as

INQUIRY, do not change

sense data.

Bit

Byte76543210

Operation Code (03h)

Logical Unit Number Reserved

2 - 3

Reserved

Allocation Length

Unused Reserved Flag Link

Field Description

Allocation

Length

This field specifies the maximum number of sense

bytes to be returned. The media changer terminates the

transfer when this number of bytes has been

transferred or when all available sense data has been

transferred to the host, whichever is less.

1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 159 160

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Quantum SuperLoader 3 Guide de l'utilisateur Page 138