Dell PowerVault TL4000 SCSI Reference Guide - Page 11

Commands, Allowed, Presence, Reservations

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Allowed commands during not ready state PREVENT/ALLOW MEDIUM REMOVAL (prevent=0) READ ELEMENT STATUS (curdata=1) READ ELEMENT STATUS (dvcid=1) RELEASE (6) RELEASE (10) REQUEST SENSE WRITE BUFFER Commands Allowed in the Presence of Reservations The details of which commands are allowed under a reservations are described in next table. The RESERVE and RELEASE commands are used to manage the reservation state of the library. Next table shows all commands allowed in the presence of reservations. Command INITIALIZE ELEMENT STATUS INITIALIZE ELEMENT STATUS WITH RANGE INQUIRY LOG SELECT LOG SENSE MODE SELECT (6) MODE SENSE (6) MODE SELECT (10) MODE SENSE (10) MOVE MEDIUM OPEN/CLOSE/IMPORT/EXPORT ELEMENT PERSISTENT RESERVE IN PERSISTENT RESERVE OUT POSITION TO ELEMENT PREVENT/ALLOW MEDIUM REMOVAL (prevent=0) PREVENT/ALLOW MEDIUM REMOVAL (prevent=1) READ BUFFER READ ELEMENT STATUS (curdata=0) READ ELEMENT STATUS (curdata=1) READ ELEMENT STATUS (dvcid=1) RELEASE (6) RELEASE (10) REPORT SUPPORTED OPERATION CODES REPORT TIMESTAMP REQUEST SENSE REQUEST VOLUME ELEMENT ADDRESS conflict conflict allowed conflict allowed conflict allowed conflict allowed conflict conflict allowed conflict conflict allowed conflict conflict conflict allowed allowed allowed allowed allowed allowed allowed conflict reserved by another initiator Chapter 2. Library Features 2-3

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Allowed
commands
during
not
ready
state
PREVENT/ALLOW
MEDIUM
REMOVAL
(prevent=0)
READ
ELEMENT
STATUS
(curdata=1)
READ
ELEMENT
STATUS
(dvcid=1)
RELEASE
(6)
RELEASE
(10)
REQUEST
SENSE
WRITE
BUFFER
Commands
Allowed
in
the
Presence
of
Reservations
The
details
of
which
commands
are
allowed
under
a
reservations
are
described
in
next
table.
The
RESERVE
and
RELEASE
commands
are
used
to
manage
the
reservation
state
of
the
library.
Next
table
shows
all
commands
allowed
in
the
presence
of
reservations.
Command
reserved
by
another
initiator
INITIALIZE
ELEMENT
STATUS
conflict
INITIALIZE
ELEMENT
STATUS
WITH
RANGE
conflict
INQUIRY
allowed
LOG
SELECT
conflict
LOG
SENSE
allowed
MODE
SELECT
(6)
conflict
MODE
SENSE
(6)
allowed
MODE
SELECT
(10)
conflict
MODE
SENSE
(10)
allowed
MOVE
MEDIUM
conflict
OPEN/CLOSE/IMPORT/EXPORT
ELEMENT
conflict
PERSISTENT
RESERVE
IN
allowed
PERSISTENT
RESERVE
OUT
conflict
POSITION
TO
ELEMENT
conflict
PREVENT/ALLOW
MEDIUM
REMOVAL
(prevent=0)
allowed
PREVENT/ALLOW
MEDIUM
REMOVAL
(prevent=1)
conflict
READ
BUFFER
conflict
READ
ELEMENT
STATUS
(curdata=0)
conflict
READ
ELEMENT
STATUS
(curdata=1)
allowed
READ
ELEMENT
STATUS
(dvcid=1)
allowed
RELEASE
(6)
allowed
RELEASE
(10)
allowed
REPORT
SUPPORTED
OPERATION
CODES
allowed
REPORT
TIMESTAMP
allowed
REQUEST
SENSE
allowed
REQUEST
VOLUME
ELEMENT
ADDRESS
conflict
Chapter
2.
Library
Features
2-3