Read Only Function; Enable Read Only Function; Disable Read Only Function - IBM 3340 Reference Manual

READ ONLY FUNCTION
The Read Only function protects previously written
data. On the 3344 units a Read or R/W switch, used
for this purpose, is located on the operator panel. In
3340 units the means for protecting data is located on
the data module.
Enable Read Only Function
1. With the data module removed from the drive'
press down the IBM logo inset of the handle (A
and B).
2. Turn inset 180" and snap into place (C).
3. The data module may now be loaded in the
desired drive.
A Read/Write
Disable Read Only Function
1. With the data module removed from the drive,
return the IBM logo inset to its original position
reverse 180' (D).
2. The data module may now be loaded into the
desired drive.
Note: Do not attempt to enable or disable the
Read Only function while the data module rests in
the drive shroud recess.
C R e a d O n l y
D Actuate from Read Only to Read/Write
B Actuate from ReadAl/rite to Read Only
Operating Instructions
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