NEC LS2400, User Manual, Page: 64 / 186

3-24 Configuring Your System
Optional RAID Controllers
One of the options available for your system is a RAID controller. The
RAID controller gives your system the added security of fault tolerance.
Two RAID controllers are available for use in your system:
!
Mylex AcceleRAID 150 (Secu
RAID 110)
Controller
!
Mylex AcceleRAID 250 (SecuRAID 210) Controller
Mylex AcceleRAID Controller
Factory Installed Controller
If you order a system with the Mylex AcceleRAID controller, the system
is pre-configured at the factory. Refer to the “RAID Configurations” table
below to determine how the RAID controller was configured at the
factory. If you want to reconfigure disk arrays and logical drives, you
must run the Mylex AcceleRAID BIOS Configuration Utility; if you want
to change the RAID level, you must run the Mylex Disk Array Controller
Utilities (DACCF) software. Refer to the Mylex AcceleRAID
documentation included with your system for information on running
the Mylex AcceleRAID BIOS Configuration Utility and the DACCF
Utility.
Mylex AcceleRAID RAID Configurations
Number of Hard Drives RAID Level
Configured Hard Drives
in Array Description
1 JBOD 1 JBOD (RAID 0) JBOD is an acronym for Just
a Bunch Of Disks. Each drive can operate
independently as with a common host bus
adapter; or multiple drives may be spanned
and seen as a single very large drive. No
redundancy is provided.
2 1 2 Mirroring (RAID 1) Drives are paired and
mirrored. All data is 100% duplicated on an
equivalent drive (fully redundant).
3 5 3 Striping with Parity (RAID 5) Data is striped
across several physical drives. Parity
protection is used for data redundancy.
4 5 3 plus 1 hot
spare drive Striping with Parity (RAID 5) Data is striped
across three physical drives. Parity protection
is used for data redundancy. This drive is used
as the “Hot Spare.”