Table 3–1 EF/RF-Series ISE Controls and Indicators
Control
Position
Function
Bus node ID plug
Installed
Identifies bus node ID number (unit number)
of ISE to system. ID is factory set to number 0
through 6.
Not installed
Bus node number undefined. Fault indicator lit.
Fault
Lit
Indicates error condition. Light temporarily on
during power-up sequence (normal condition).
Not lit
Indicates error-free condition in ISE.
Run/Ready
In (lit, green)
ISE on line, available for use. Green light
flashes as seek operations are performed.
Out (not lit)
ISE off line, cannot be accessed. Green light
cannot be lit when Run/Ready button is out.
Write-Protect
In (lit, amber)
ISE write-protected. Prevents system software
from writing to ISE.
Out (not lit)
ISE not write-protected. System software can
read from or write to ISE.
3.1.1.2 Write-Protecting an EF/RF-Series ISE
You may want to write-protect an ISE containing sensitive data you do not want
changed or accidentally erased.
• For all but the 3.5-inch RFs, you write-protect an ISE by setting the Write-
Protect button to in (lit).
• For ISEs, you set write-protection through VMS commands or through
firmware commands in console mode, explained later in this section.
The Write-Protect button controls whether your system can write data to the ISE.
Your system can read from the ISE regardless of the setting of that button. When
that button is out (not lit), your system can write to the ISE.
Your system disk (the ISE containing system software) and ISEs containing work
areas for users should be write-enabled, the normal setting.
3–4 Operating the System Options
