Optional RAID Controllers

Factory Installed Controllers

The RAID options available for your system are the dual channel Mylex AcceleRAID150 (SecuRAID 110) and Mylex AcceleRAID250 (SecuRAID

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 AcceleRAID150 or AcceleRAID250 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 AcceleRAID150 or AcceleRAID250 documentation included with your system for information on running the AcceleRAID150 or AcceleRAID250 BIOS Configuration Utility and the DACCF utility.

CAUTION

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.

RAID Configurations

Number of

RAID Level

Hard Drives in

Description

Hard Drives

Configured

Array

 

 

 

 

 

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

Striping with Parity (RAID 5) Data is striped across three

 

 

spare drive

physical drives. Parity protection is used for data redundancy.

 

 

 

This drive is used as the “Hot Spare.”

 

 

 

 

5 or more

The first four disks are as stated above. The remaining disks

 

 

 

are not part of the array, but are ready to be configured.

 

 

 

 

3-22 Configuring Your System

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NEC LC1400 manual Optional RAID Controllers, Factory Installed Controllers, RAID Configurations