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Beginning-Of-Media
Recording Area
Early-Warning Area
End-Of-Media
Tandberg Data
This area holds no user data. It is used to record a
special reference burst as defined in [9], [10]. This
area starts with the BOT (Beginning Of Tape) tape marker
and ends at the LP (Load Point) tape marker.
This area holds the user data. This area starts with the
LP (Load Point) tape marker and ends at the LEW (Logical
Early Warning) marker.
When writing, the Initiator needs an indication that it
is
approaching
position called Logical Early Warning (LEW) is reported
to the Initiator at a position early enough for the
Drive to write out any buffered data to the medium while
still leaving enough room for additional recorded data
or
tapemarks.
The
configurable,
see
14.3.9. This area ends at the EW (Early Warning) tape
marker.
This is the short area between the EW (Early Warning)
and the EOT (End-Of-Tape) tape markers. It is usually
possible to complete the writing of a single last frame
between EW and EOT. When this has been done or when EOT
is found, all further write operations are discontinued
even if the there are more data to be written in the
data buffer.
2.3.
Partitions Within a Volume
A volume may be split into several mini-volumes called
partitions. Each partition has its own set of beginning
and ending points. Each partition within a volume has
defined its own Beginning-Of-Partition (BOP), Recording-
Area, Early-Warning-Area and End-Of-Partition (EOP).
In the first partition (partition zero) on a volume with
n partitions, BOP is identical to BOM. In the last
partition on a volume (partition n-1), EOP is identical
to EOM.
All
volumes
have
partition zero, or the default partition.
When a volume is mounted (that is inserted into the
Drive
and
then
positioned to the beginning of the default partition
(partition zero). This is also true when a LOAD command
(with the Load bit set to one) is executed. When a
REWIND or ERASE command is received in any partition,
the Drive positions to the beginning of the current
partition.
2-3
Tandberg SLR Product Line SCSI Functional Specifications
the
end
of
the
actual
amount
the
LEW
Position
a
minimum
of
loaded),
the
About Tape Streamers
Recording-Area.
of
data
is
field
in
Section
one
partition
called
volume
is
logically
This
user
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