B&R Industries Automation PC 620, Руководство пользователя

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Technical data • Individual components
Chapter 2
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137 Automation PC 620 User's Manual V 1.90
3.7 RAID system
Sometimes it is simply not possible to avoid using hard disks due to the amount of data that
needs to be saved. In this case, a RAID provides high system availability. All data is
simultaneously and automatically stored on two hard drives. This double data storage means
that when one hard disk fails, the system will continue to run on the second hard disk.
Advantages for the user:
• No data loss when hard drive fails.
• The system continues to run with a hard disk.
• Data redundancy is automatically restored to the system when the faulty hard disk has
been replaced.
The RAID 1 system is executed in the form of 2 PCI cards: PCI RAID controller (5ACPCI.RAIC-
00) and PCI card with two hard disks (5ACPCI.RAIS-00, 5ACPCI.RAIS-01). The system can be
implemented in all APC620s with two free PCI slots. There are no further hardware
requirements. The RAID card has its own controller. This means that the industrial PC's main
processor is not overloaded by redundant data storage. The system also supports RAID 0
applications. As a result, parallel access to two hard drives with a relatively high data throughput
is the main focus, in addition to the high availability.
Figure 60: RAID 1 System schematic
File A
File B
File C
File D
File A
File B
File C
File D