
3-22
Configuring Your System
Optional RAID Controller
Factory Installed Controller
One of the options available for your system is the dual channel Mylex
AcceleRAID 250 (
NEC SecuRAID 210)
Controller board, which gives your
system the added security of fault tolerance.
If you order a system with the RAID controller, the system is pre-
configured at the factory. Refer to the “RAID Configurations” table 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
AcceleRAID 250 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 AcceleRAID 250 documentation included
with your system for information on running the AcceleRAID250 BIOS
Configuration Utility and the DACCF Utility.
RAID Configurations
er of Hard Drives
RAID Level
Configured
Hard Drives in
Array
Description
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.
1
2
Mirroring (RAID 1) Drives are paired and
mirrored. All data is 100% duplicated on an
equivalent drive (fully redundant).
5
3
Striping with Parity (RAID 5) Data is striped
across several physical drives. Parity
protection is used for data redundancy.
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.”
more
_
_
The first four disks are as stated above; the
remaining disks are not part of the array, but
are ready to be configured.
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Страница 135: ...B System Setup Utility System Setup Utility SSU Creating SSU Diskettes Running the SSU Exiting the SSU ...
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