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100

101

Chapter 4 SCSI Commands

RELEASE (10) Command (57h)

DLT-S4 Interface Reference Guide 278

RELEASE (10) Command (57h) 4

The RELEASE and RESERVE commands provide contention resolution in

multiple-initiator systems. The

RELEASE (10) command releases a

previously reserved logical unit. The tape drive does not return an error if

an initiator attempts to release a reservation that is not currently valid.

Figure 139 RELEASE (10)

Command Descriptor Block —

Data Format

Note: This command has been made obsolete in the latest version of

SCSI-3 and should not be used with any new implementations.

The tape drive supports this command for legacy applications

only.

Bit

7 6 5 4 3 2 1 0

Byte

0 Operation Code (57h)

1 Reserved 3rdPty Reserved LongID Extent (0)

2 Reservation Identification

3 Third Party Device ID

4 — 6 Reserved

7 — 8

(MSB)

Parameter List Length

(LSB)

9 Control

1 2 ... 307 308 309 310 311 312 313 314 315 316 317 ... 385 386

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