500300 Rev. U
Controls and Indicators
2-5
different densities. When the density indicator shows 6250, a small letter
S
to the
right of the density indicates “slow-GCR”—GCR at 62.5 IPS.
2.3.1.2
Status
•
STANDBY
- Indicates the tape is not loaded.
•
OFFLINE
- Tape is loaded but the drive is offline and unable to accept a host
command.
•
XXX%
- Tape indicator — see Section 2.3.1.5.
2.3.1.3
Drive Address
The drive address appears when the drive is in the Standby condition (not applicable
to SCSI drives).
2.3.1.4
Reel Size
All models support 6, 7, 8.5, and 10.5-inch reels.
The reel diameter message is replaced with the Early EOT message (E.EOT) when
there is less than approximately 70 feet of tape remaining on the supply reel before
the physical End-Of-Tape (EOT) tab. When the EOT tab is physically past the
read/write head, the display changes to EOT, indicating the true end of tape has
been reached.
2.3.1.5
Tape Indicator
The tape indicator appears in display line one whenever the drive is online and
ready to accept host commands. It displays the amount of tape on the take up reel as
a percentage of the total amount of tape on the supply reel, regardless of the supply
reel size. The tape indicator display is continuously updated as the tape moves, and
a direction arrow appears to the right of the percent sign whenever the tape is
moving. A right arrow (
→
) indicates the tape is moving forward (towards EOT) and
a left arrow (
←
) indicates the tape is moving reverse. Forward motion causes the
percentage of tape on the take up reel to increase.
2.3.2
Display Line Two
2.3.2.1
Density Indicators
At the completion of a load sequence, the left side of display line two indicates the
density at which the drive will read, and the right side indicates the pre-existing
density of the tape, i.e., the
detected
density. The detected density is determined by
reading the ID burst on the tape during the load sequence. An asterisk ( * ) after the
detected density display indicates that no ID burst was found on the tape. In this
case, the detected density assumes the value of the NO-ID DEN parameter (either
Blank, 800 or 3200) which you can select in the Drive Configuration Menu (see
Chapter 4).
