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Chapter 2 Media Changer Commands

Reserve Element (6) Command (16h)

Quantum SuperLoader 3 Software Interface Guide 133

Reserve Element (6) Command (16h)

The RESERVE ELEMENT command reserves the specified media changer

for exclusive use by the requesting initiator or for another specified SCSI

device. Element reservations are not supported.

Third party reservations are not supported by this command. The

Reserve Element (10) must be used instead.

Figure 78 Reserve Element (6)

Descriptor

A reservation via the RESERVE ELEMENT command remains in effect

until one of the following conditions is met:

• The initiator that made the reservation sends another

RESERVE

ELEMENT

command.

• The device is released via a

RELEASE ELEMENT command from the

same initiator.

•A

BUS DEVICE RESET message is received from any initiator.

• A hard reset occurs.

The occurrence of the last two conditions is indicated by the media

changer returning a

CHECK CONDITION status, sense key of UNIT

ATTENTION

on the next command following the condition. It is not an

error to issue a

RESERVE ELEMENT command to a media changer that is

currently reserved by the requesting initiator.

Bit

Byte76543210

Operation Code (16h)

Logical Unit Number Obsolete Rsv’d

2 - 4

Reserved

Unused Reserved Flag Link

1 2 ... 144 145 146 147 148 149 150 151 152 153 154 ... 159 160

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Quantum SuperLoader 3 Guide de l'utilisateur Page 149