4-12
Menu Operations
500300 Rev. U
marginal read signal amplitudes. This option is not available on model 340X tape
drives.
•
AUTO
- Enables the adaptive PE automatic gain system
•
FIXED
- Selects a fixed value of PE read gain.
4.3.2.23
GCR SPEED: (Default = Norm)
This parameter is present in all 341X drives, but is only functional in models 3416
and 3418. The GCR tape speed is always 125 IPS for models 3410 and 3412 and 62.5
IPS for models 3413 and 3414. Models 3416 and 3418 can operate at either 125 IPS
(normal) or 62.5 IPS (slow) during GCR operation.
When the system throughput is lower than the normal GCR average data transfer
rate (781 kilobytes per second), the tape drive will reposition the tape between every
block. Reducing the tape speed to 62.5 IPS reduces the GCR average data transfer
rate to 390 kilobytes per second, allowing the tape to stream on slower systems.
•
NORMAL
- Locks tape speed during GCR operations to 125 IPS.
•
SLOW
- Locks tape speed during GCR operations to 62.5 IPS.
•
BOTH
- Allows you to select GCR tape speed via the DENSITY switch when the
tape is at BOT. A small letter S after the 6250 in display line one indicates a
GCR tape speed of 62.5 IPS. If the host selects GCR operation, the speed will be
125 IPS.
4.4
Manual Threading Function
If necessary, you can thread the tape manually as follows:
1.
Press the MENU switch; the MENU indicator should illuminate.
2.
Press or until display line one indicates
MANUAL THREADING
.
3.
Press ENTER. The BUSY indicator will illuminate and repeating instructions
will appear in the LCD.
4.
Follow the instructions to manually thread the tape.
a.
If the load cycle is successful, the drive will automatically exit the Menu mode
and return to normal operation.
b.
If the load cycle fails, press LOAD again to try again, or press EXIT to exit
the Menu mode.
4.5
Maintenance Menu
The Maintenance menu contains a number of sub-menus designed to help you
maintain the tape drive and diagnose problems.
