Siemens SIMATIC IPC547E, Operating Instructions Manual

Page: 52 / 154

Commissioning the device
4.5 Notes on various device configurations
SIMATIC IPC547E
52
Operating Instructions, 02/2014, A5E32317120-AB
4.5.3.2 RAID5 system
This is a RAID5 system configuration (striping with parity). This means that if there is a
defective hard disk drive or there are cable problems, the system can continue to operate in
one channel and achieve a high degree of availability.
Note
You can find information about the Intel® RAID controller in the RAID documentation in the
"Drivers\RAID\Intel" directory on the supplied "Documentation and Drivers" DVD.
Additional information on RAID5 systems can be found in the section "Managing RAID
systems (Page 67)".
4.5.3.3 RAID system with hot spare drive
In the factory state, the device is configured as a RAID1 or RAID5 system with a hot spare
drive. A hot spare drive is a drive included in the device as spare.
If a defective drive is detected in the RAID1 or RAID5 system, the hot spare drive is
automatically integrated during ongoing operation instead of the defective drive and takes
over its function. The rebuild process to the hot spare drive starts automatically.
The defective drive is signaled as status display by the SIMATIC IPC DiagBase Alarm
Manager.
A data-secure system is restored once synchronization is complete.
To restore full functionality of the RAID system with hot spare drive, you must replace the
defective drive with a new one and integrate it once again as hot spare drive in the RAID
system in the RAID software.
● Information on replacing the hot spare drive is available in the section "Replacing a
defective hard disk drive in the RAID system (Page 83)".
● Information on integration of a replaced hot spare drive into the RAID system is available
in the section "Integrating a hot spare hard disk drive in the RAID system (Page 74)".
See also
Status displays (Page 20)