Encrypted Plc Partition (Plce:); Checking The File System - HEIDENHAIN iTNC 530 HSCI Technical Manual

Checking the file
system

9.3.1 Encrypted PLC partition (PLCE:)

1690
(Only for single-processor version)
The TEST FILE SYSTEM soft key was introduced in the second soft-key row
in the Programming and Editing mode under MOD. It can be used to start the
program dosfsck in order to check and automatically repair the file system of
the PLC and TNC partition of the control's hard disk.
Please ensure that no NC program is being run, and save open files if
necessary. When the dosfsck program is started, the NC software will be
terminated and an EMERGENCY STOP will be triggered as soon as you
confirm the associated prompt with the YES soft key. The outputs of the
corresponding program dosfsck are shown in a window and must be
acknowledged with the <Enter> key or OK button. The control then boots
again. The outputs are also written to the log. The SYS: partition cannot be
checked, but it is checked each time the control is switched on.
The machine manufacturer has the possibility to create an additional PLC
partition, which is automatically encrypted. The PLCE: partition enables the
machine manufacturer to protect his files and data from unauthorized access.
The encrypted PLC partition PLCE: can only be accessed with a password that
the OEM chooses. The password is stored in encrypted form either in the
OEM.SYS file or in the SIK.
Note
HEIDENHAIN recommends:
Storing the password in the SIK, because it provides a higher degree of

security than the OEM.SYS.
Using the PLCE partition generally only for specific files that are to be

protected from unauthorized access.
Against using the PLCE partition for system files (such as MP files,

NCMACRO.SYS). Please keep in mind that HEIDENHAIN cannot access
the data in the encrypted partition, even if servicing becomes necessary.
HEIDENHAIN Technical Manual iTNC 530 HSCI