2-2
Controls and Indicators
500300 Rev. U
Pressing ONLINE while the tape is loading will toggle the
pending online
state. A
LOADING
message indicates the drive will not go online at the completion of the load
sequence; an
ONLINE PEND
message indicates the drive will automatically go online
after the load sequence is complete.
Once the tape has been loaded, the ONLINE switch toggles the online state as
indicated by the ONLINE indicator. The online status is also sent to the host. When
off-line, the tape drive cannot accept host commands. You may also toggle the online
state while the tape is rewinding.
NOTE
Placing the drive off-line during a write operation may prematurely terminate a data block and
should only be done to abort a runaway condition. Placing the drive off-line during a read
operation will terminate the read sequence after the present block has been completely read.
2.1.2.3
DENSITY Switch
When the drive is in the standby state or when it is off-line and the tape is at BOT,
pressing the DENSITY switch cycles the selected density from 800, 1600, 3200,
6250, 6250s, and back. When the tape is beyond BOT, the DENSITY switch is
disabled. The beginning of display line one shows the density you selected.
NOTE
A small letter
S
following the
6250
indicates that slow-GCR (62.5 IPS) is selected, as opposed to
the normal GCR tape speed of 125 IPS. This mode is available only on certain models. In
addition, these models can be configured via the Drive Configuration menu to move tape only
at 62.5 IPS during GCR operation, or only at 125 IPS, in which case the
S
will not appear.
If a drive does not support a particular density, that density will not be displayed.
800 CPI is a read-only density.
2.1.2.4
MENU Switch
The MENU switch toggles the Menu mode on and off as indicated by the MENU
indicator. When in the Menu mode, all four push-button switches assume new
functions. Refer to Chapter 4 for more information.
2.2
Front Panel Indicators
Five LED indicators on the front panel display additional drive status when on:
•
BUSY
- The tape is in motion and the door or top cover should not be opened.
•
FPT
- Where is no write-enable ring on the supply reel, or 800 CPI has been
selected, or the Read Only mode is on. In each case, the drive is File Protected
and will not write on or erase the tape.