Optional Raid Controllers; Factory Installed Controllers - NEC MC2400 User Manual

Optional RAID Controllers

Factory Installed Controllers

The RAID options available for your system are the dual channel Mylex
AcceleRAID
210) Controller boards, which gives your system the added security of fault
tolerance.
If you order a system with a RAID 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 AcceleRAID
AcceleRAID
level, you must run the Mylex Disk Array Controller Utilities (DACCF)
software. Refer to the AcceleRAID
included with your system for information on running the AcceleRAID
AcceleRAID
Some server systems have network operating systems
preloaded at the factory. If a network operating system is
preloaded on your server system, then use of the DACCF
utility is not required. However, if you do use the DACCF
utility you may need to reload the network operating system.
Make sure that you have all the pertinent software to
perform the reload.
Number of RAID Level
Hard Drives Configured
1 JBOD
2 1
3 5
4 5
5 or more —
3-24 Configuring Your System
™
150 (SecuRAID 110) and Mylex AcceleRAID
™
250 BIOS Configuration Utility; if you want to change the RAID
™
250 BIOS Configuration Utility and the DACCF utility.
! CAUTION
RAID Configurations
Hard Drives in
Array
1
2
3
3 plus 1 hot
spare drive
—
™
150 or AcceleRAID
Description
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.
Mirroring (RAID 1) Drives are paired and mirrored. All
data is 100% duplicated on an equivalent drive (fully
redundant).
Striping with Parity (RAID 5) Data is striped across
several physical drives. Parity protection is used for
data redundancy.
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."
The first four disks are as stated above. The
remaining disks are not part of the array, but are
ready to be configured.
™
250 (SecuRAID
™
150 or
™
250 documentation
™
150 or