Siemens Simatic IPC647C Operating Instructions Manual page 51

Note
The table and information below apply only to the delivery state of the device, that is if no
changes or expansions were made.
Always replace the faulty drive with a new one of the same type and capacity.
NOTICE
Drives in removable racks can be hot-swapped without shutting down the device.
Devices without removable rack may only be replaced in shutdown state.
The new HDD can be integrated into the RAID system at operating system level by means
of the RAID software. Synchronization may take several hours, depending on system load.
The HDD alarm displays on the front will flash during this process. This is not possible at
BIOS level.
Points to note if the hard disk is replaced when the computer is turned off
Only a hard disk that was active and functioning correctly when you booted can later be
included in the RAID array.
To be able to boot from the RAID system, you must place this first in the list of bootable
sources in the BIOS "Boot" setup menu. Otherwise the system will boot from the hard disk
you have just installed and the message "Operating system not found" will be displayed.
SIMATIC IPC647C
Operating Instructions, 12/2010, A5E02669337-02
Commissioning
7.4 Notes on operation
51