Siemens SIMATIC Box PC 627, Руководство по эксплуатации

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Commissioning
7.5 Notes on operation
SIMATIC Box PC 627
7-4
Operating Instructions, Release 05/2006, A5E00362052-03
7.5.2.1 2 HDD system
Two 2.5" hard disks are installed in the device depending on the device features. The two
hard disks are connected to the SATA ports 0 and 2. The hard disk on SATA port 2 is not
configured. This gives you the option of backing up your data to this hard disk. For
information on hard disk capacities, refer to your order documentation.
Booting from the slave hard disk
The system boots by default from the hard disk on SATA port 0. You can also configure the
system to boot from the disk on SATA port 2.
In order to allow booting from the second hard disk, you need to configure it as the primary
boot device. Make the following settings in your BIOS Setup:
Select Boot > Hard Drive > <Drive name> e.g. FUJITSU MHT2060BH - SATA2, then press
the "+" key to move it up in the boot order.
Notice
The drive letters for the partitions on both drives are assigned by the operating system used.
You can change these in the Control Panel as required.
7.5.2.2 RAID system
RAID 0 system
A RAID 0 system (Stripe) enables you to increase the read/write speed of your hard disk
system. This configuration reduces the reliability of the drive system, however. RAID 0 is
therefore not recommended and is omitted from the installation instructions.
RAID 1 system
A RAID 1 system (mirroring) enables you to increase the data security of your hard disk
system. It involves copying (mirroring) the data to a second hard disk.
Each hard disk is operated on a separate SATA channel. The system can continue to
operate even when a problem is detected on one of the hard disks. The data backed up on
the RAID1 network is retained. This data would be lost on a single drive or without RAID1.
RAID1 therefore increases the availability of the system.