StorageWorks DLT 10/20 GB Cartridge Tape Drive
4–4
Order Number: EK–SM1TB–UG. E01
Table 4–2 Left-side Front Panel Indicators and Controls
Label
Color
State
Operating Condition or Function
TK85
Yellow
On
Indicates tape was last recorded in
TK85 format.
Blinking
Indicates tape was last recorded in
another density but has been selected
for recording in TK85 density. (You
select this density for a write from BOT.)
TK86
Yellow
On
Indicates tape was last recorded in
TK86 format.
Blinking
Indicates tape was last recorded in
another density but has been selected
for recording in TK86 density. (You
select this density for a write from BOT.)
TZ87
Yellow
On (default)
Indicates tape was last recorded in TZ87
format.
Blinking
Indicates tape was last recorded in
another density but has been selected
for recording in TZ87 density. (You
select this density for a write from BOT.)
Off
Compression mode is disabled.
Compress
Yellow
On
Compression mode is enabled.
(Compression can be done in TZ87
density, only.)
Density Override
Yellow
On
A density selection has been set from
the drive’s front panel.
Off (default)
Density selection is under host control or
else is automatic.
Blinking
Unit is in density selection mode;
pressing Density Select push-button at
this time will cause next-higher density
option to be selected.
Density Select
Recessed
(pushed in)
If Density Override indicator is off,
activates density selection mode,
causing that indicator to blink. If Density
Override indicator is blinking (meaning
density selection mode is already
active), causes next higher density
option to be selected.
At rest
(out)
Normal inactive condition for this spring-
loaded push-button switch.
4.3
Power-On Self-Test (POST)
The POST (Power-On Self-Test) test , which is performed automatically whenever the
10/20-GB tape drive is powered on, verifies operational integrity of the tape drive. Operation
of the POST exercise for the different models is delineated in Section 2.5 for the SWXTL-
BT SBB and Section 3.4.1 for the SWXTL-BT Tabletop, as part of the installation
procedures, but is repeated here, generically, for convenience. The operation may be
