Chapter 1. introduction, Chapter, Introduction – Dell PowerVault TL2000 User Manual
Page 7
Chapter
1.
Introduction
This
document
describes
the
SCSI
Media
Changer
Command
Set
for
the
Dell
™
PowerVault
™
TL2000
Tape
Library
and
TL4000
Tape
Library.
The
host
will
recognize
both
a
tape
drive
and
a
Media
Changer
on
the
same
SCSI
ID.
On
this
SCSI
ID
logical
unit
zero
is
reserved
for
the
tape
drive
and
logical
unit
one
is
used
for
the
media
changer.
The
tape
drive
will
pass
the
received
SCSI
commands
for
LUN
1
over
to
the
attached
library
controller
by
means
of
serial
communication.
The
SCSI
media
changer
commands
are
based
on
the
following
specifications.
Document
T10
Version
ANSI
INCITS
Version
SMC-2
T10/1383-D
rev
7
ANSI
INCITS
382-2004
SPC-3
T10/1416-D
rev
23
SAM-2
T10/1157-D
rev
24
ANSI
INCITS
366-2003
A
media
changer
logical
unit
receives
commands
to
move
cartridges
between
various
types
in
the
element
address
space.
The
element
types
are
storage,
import-export,
data
transfer,
and
medium
transport.
The
cartridge
handling
robotic
subsystem,
addressed
as
a
medium
transport
element,
moves
cartridges
within
a
media
changer.
The
media
changer
logical
unit
maintains
an
inventory
of
cartridges
and
the
element
addresses.
The
media
changer
logical
unit
reports
this
inventory
when
requested
as
well
as
identifying
the
element
address
assigned
to
different
types
of
elements.
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