H3C UniServer R4950 G3 User Manual

1
Configuring the embedded RSTe RAID
controller or VROC SATA RAID controller
Rack servers, blade servers, and compute modules may provide embedded RSTe RAID controllers.
About the embedded RSTe RAID controller
The embedded Intel Rapid Storage Technology enterprise (RSTe) RAID controller (referred to as
VROC SATA RAID controller for G5 servers) is embedded on the southbridge of the system board.
Integrating AHCI and RAID programs, the RAID controller is mainly used to manage Intel chip
set-based drives, check the status of the drives, and provide RAID capacity for systems that use
SATA drives. If the RAID controller has multiple drives attached, you can configure RAID arrays to
protect data and improve read/write performance.
If you use the embedded RSTe RAID controller to configure RAID, you can create a maximum of
two logical drives with a physical drive. The second logical drive will use the remaining capacity of
the physical drive, and the logical drive size cannot be adjusted.
The RAID controller has one SATA controller and one sSATA controller. For the positions of the
controllers, see the user guide of the server.
For the embedded RAID controller, you can configure RAID in both UEFI mode and legacy mode.
Features
Operating modes
The RAID controller supports the following operating modes:
•
AHCI mode—This is the default mode. In this mode, all physical drives are exposed to the
operating system (OS). The drives can be directly used for data storage. Native Command
Queuing (NCQ) is supported, which improves the I/O performance of SATA drives.
•
RAID mode—In this mode, RAID functions are enabled and RAID arrays can be created on
physical drives to improve I/O performance and data security.
NOTE:
•
For the new mode to take effect, restart the server after an operating mode change.
•
The OS might fail to start up after the operating mode of the storage controller is changed. To
resolve this issue, reinstall the OS. If the issue persists, contact Technical Support.
RAID levels
The supported RAID levels vary by storage controller model. For more information about the
supported RAID levels of each storage controller, see H3C Servers Storage Controllers Technical
Specifications.
Table 1 shows the minimum number of drives required by each RAID level and the maximum
number of failed drives supported by each RAID level. For more information about RAID levels, see
"Appendix B RAID arrays and fault tolerance."
Table 1 RAID levels and the numbers of drives for each RAID level
RAID level Min. drives required Max. failed drives
RAID 0 2 0

H3C UniServer R4950 G3 Specifications

General

Brand	H3C
Model	UniServer R4950 G3
Category	Server
Language	English