Chapter 3 Media Changer Commands
Reserve Element (6) Command (16h)
164
Quantum ATL SuperLoader Software Interface Guide
Figure 85 Reserve
Element (6) Descriptor
(DLT)
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.
If another initiator has previously reserved the logical unit, the
target returns a RESERVATION CONFLICT status.
If, after honoring the reservation, any other initiator attempts to
perform any command except INQUIRY, REQUEST SENSE, or
RELEASE ELEMENT, the command is rejected with a
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (16h)
1
Logical Unit Number
3rdPty
Third Party Device ID
Rsv’d
2 - 4
Reserved
5
Unused
Reserved
Flag
Link
Summary of Contents for SuperLoader DLT
Page 1: ...ATL SuperLoader DLT and ATL SuperLoader LTO Software Interface Guide 81 60220 01 A02...
Page 18: ...Preface Document Conventions xviii Quantum ATL SuperLoader Software Interface Guide...
Page 44: ...Chapter 2 Messages Supported SCSI Messages 26 Quantum ATL SuperLoader Software Interface Guide...
Page 196: ...Index 178 Quantum ATL SuperLoader Software Interface Guide...