Commissioning the device   
4.3 Information on optional features 
  SIMATIC IPC547D 
44  Operating Instructions, 06/2011, A5E03473780-01 
Comments about faults 
 
NOTICE 
 
Input delay 
The data is synchronized during a drive failure. Depending on the work load of the 
processor and hard disks, the system may react with some delay. Execution of keyboard, 
mouse or touch screen commands may be briefly delayed in extreme situations. 
This could result in operator errors on the machine or plant. 
Do not operate safety-critical functions during a drive failure. 
 
Replacing a faulty drive in a RAID system 
Replace faulty RAID drives with a new drive in order to recover secure RAID1 state.  
The RAID software indicates the following: 
●  A defective drive 
●  Details of the functioning hard disk. 
The functioning hard disk is indicated by BIOS with its port number or by the RAID 
software with its device port number.