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48
Chapter: 9
Hard
Disks
SCSS Termination
The
ends of a
SCSI
daisy
chain
must
be.
terminated
correctly.
Otherwise, data
errors,
system
crashes,
etc.,
may
occur.
Termination
at
the
DR4
end
of
the
chain
is
taken care of
by
the
DR4.
At
the other
end
of the chain
you must
fit
a
terminator.
Some
SCSI
devices
have a
terminator
built-in.
This type of device
must
always be connected
at
the
end
of
the daisy chain.
Other
devices
are
supplied with
an
in-line
type terminator
that
you must
connect
to
the
unused
SCSI
connector.
The
following
diagram shows
how
a
SCSI
daisy
chain should
be
terminated:
Internal
termination
taken
care
of
by
DR4
The
following
diagram shows an example of an
in-line
terminator
connected
to
a
hard
disk:
SCSI
cable
JL
In-line
terminator
DR4
Hard
disk
^
Checking
Disks
on
SCSI
-A Bus
To
check
the
status
of a hard disk
connected
to
SCSI-A
bus:
!)
Press
th©
SUB-MENU
key.
Its
indicator will
flash,
2) Press
the DISK key.
The SCSI
ID
of
all
hard
disks
that
have been formatted
and
are
ready
for
recording
will
appear.
A
flashing
SCSI
ID
indicates
that
the
DR4
has
acknowledged
a
connected hard
disk,
but the
disk has not yet
been
formatted.
If
you
have connected
a hard
disk,
but
its
SCSI ID
does
not appear,
make
sure
that
all
SCSI
IDs
are
set correctly,
all
SCSI
cables are
connected
correctly,
and
the
hard disk
is
powered
on.
Version
1.0
5/93
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