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Chapter 2 Media Changer Commands

Reserve Element (10) Command (56h)

Quantum SuperLoader 3 Software Interface Guide 130

Reserve Element (10) Command (56h)

The RESERVE and RELEASE commands are used for contention

resolution in multiple-initiator systems. The

RESERVE command is used

to reserve a logical unit. The

RESERVE (10) Command Descriptor Block is

shown in figure 76

, and the data fields are described in table 60.

Figure 76 Reserve Element

(10) Descriptor

4E 00 Overlapped Commands Attempted

Bit

Byte765 4321 0

Operation Code (56h)

Reserved 3rdPty Reserved LongID Element

Reservation Identification

Third Party Device ID

4 - 6

Reserved

7 - 8

(MSB)

Parameter List Length

(LSB)

Unused Reserved Flag Link

Sense Key ASC ASCQ Description

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 159 160

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