Preventing potential failures ...

... with RAID1 configuration (automatic mirror disk system)

SIMATIC PCs with RAID1 configuration save all data through automatic parallel mirroring on two hard disks. If one of the two drives fails, all data are nevertheless retained.

The redundant architecture offers the following advantages:

• Reliable prevention of data losses in the case of a hard disk failure as the simultaneous failure of both disks is highly improbable.
• The system remains executable after failure of one hard disk.
• Automatic data security without intervention by the user.
• After replacement of a defective hard disk, the mirror disk system is automatically restored by means of "Auto Rebuild".