Data
Cartridge
Capacity
Scaling
The
SET
CAPACITY
SCSI
command
enables
a
customer
to
capacity
scale
a
data
cartridge
to
enable
faster
random
access.
As
an
example,
a
customer
could
capacity
scale
a
data
cartridge
to
20%
of
its
normal
length
which
improves
the
average
access
time
by
almost
a
factor
of
5;
however,
it
also
reduces
the
native
capacity
of
the
tape
to
80
GB.
Supported
Servers
and
Operating
Systems
The
drive
attaches
to
the
servers
and
operating
systems
shown
in
Table
1.
Any
attachment
can
include
(but
is
not
limited
to)
these
servers
and
operating
systems.
To
determine
the
latest
supported
attachments,
visit
the
web
at
http://www.ibm.com/storage/lto
.
For
specific
instructions
about
attaching
the
drive,
see
“Installing
the
Drive”
on
page
13.
Table
1.
Supported
servers
and
operating
systems
for
SCSI
and
Fibre
Channel
attachment
Supported
Servers
Supported
Operating
Systems
IBM
AS/400
®
or
ERserver
iSeries
™
OS/400
®
IBM
RS/6000
®
,
RS/6000
SP,
or
Eserver
pSeries
®
AIX
®
IBM
Eserver
zSeries
®
800
or
900
Linux
™
Hewlett-Packard
HP-UX
Sun
Microsystems
Solaris
32-bit,
Intel
™
-compatible
servers
Microsoft
Windows
2000
or
Windows
®
2003
Red
Hat
Linux
64-bit,
Intel
Itanium
servers
Red
Hat
Linux
SCSI
Interface
To
communicate
with
a
server,
the
SCSI
drive
uses
the
Ultra160
LVD
SCSI
interface.
Physical
Characteristics
The
drive
contains
a
high-density,
68-pin,
D-shell
receptacle
connector
(HD68)
for
attachment
to
the
server.
The
HD68
connector
includes
the
connectors
for
the
SCSI
signal,
the
SCSI
ID,
and
the
drive’s
power.
The
drive
supports
LVD
SCSI
cables
with
HD68
connectors.
For
a
list
of
available
cables,
see
“Parts
List”
on
page
109.
Speed
The
Ultra160
LVD
SCSI
interface
is
compatible
with
older
SCSI
technology
and
is
capable
of
data
transmission
at
160
MB/s.
Ultra160
SCSI
uses
the
three
management
features
of
the
Ultra3
SCSI
standard
that
specifically
affect
data
transfer
rate:
v
Double
transition
clocking
-
a
data-transfer
technique
that
enables
data
rates
to
double
without
increasing
clock
speed
v
Domain
validation
-
a
procedure
that
detects
and
adjusts
SCSI
configuration
issues
that
might
prevent
interoperation
between
SCSI
devices
v
Cyclic
redundancy
check
(CRC)
-
an
error-checking
technique
6
IBM
TotalStorage
Ultrium
Tape
Drive
|
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Содержание TotalStorage Ultrium T800
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