HP ProLiant DL140 G3 Server - Manual (Page 29)

RAID configuration 29
RAID configuration
RAID overview
RAID–redundant array of independent (originally, inexpensive) disks–is a method of replicating the same data on
multiple hard disks (thus, redundantly). In this system’s case, in two SATA hard drives. By storing data on multiple
locations, I/O operations can be performed in parallel boosting system performance. RAID also improves system
reliability by increasing the mean time between failures (MTBF). Furthermore, RAID enables real-time data
recovery during hard drive failure, thus protecting users from data loss and system downtime.
The HP ProLiant DL140 Generation 3 system supports both RAID 0 and RAID 1 levels.
•
RAID 0 – Supports data striping (splitting data evenly across two or more disks) but no parity information
for redundancy. This level provides improved performance but not data protection. If one drive fails then all
data in the array is lost.
• RAID 1 – Employs disk mirroring, a technique in which data is stored on two duplicate disks simultaneously.
This way if one of the drives fails, the system can instantly switch to the other drive without any loss of data
or service.
SATA RAID configuration
When using non-hot-plug SATA hard drives, RAID function is embedded in the BIOS chipset. While for hot-plug
SATA/SAS hard drives, the function is based on the installed standard height/full-length PCI-X SATA/SAS
controller board. The procedure below applies to systems using non-hot-plug SATA drives.
CAUTION: Back up any data stored on the hard drives before performing the procedures below. The
configuration process erases all data on the hard drives.
NOTE: Before performing the procedure below, verify that the two non-hot-plug SATA drives are installed in the
system.
To set up RAID for non-hot-plug SATA drives:
1. Turn on the monitor and the server.
If the server is already turned on, save your data and close all open applications, then restart the server.
2. During POST, press F10 to launch the PhoenixBIOS Setup Utility.
If you fail to press F10 before POST is completed, you will need to restart the server.
3. In the Setup Utility screen, click the Advanced menu tab.
4. Select the Advanced Chipset Control field.
5. Select the SATA Controller Mode Option field, then press the plus (+) or minus (-) key to set the field value to
Enhanced.
6. Select the SATA RAID Enable field, then press the plus (+) or minus (-) key to set the field value to Enabled.
7. Press F10, then select Yes to save the changes you made and close the Setup Utility.
The system automatically reboots. You will be prompted to enter the HP Embedded SATA Setup Utility.
8. Press F8 to access the HP Embedded SATA Setup Utility.