2-12RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

RAID Levels Supported

The RAID Array 3000 controller supports the following RAID levels:

 

 

 

Table 2-3

 

RAID Levels Supported

 

 

 

 

RAID Level

 

 

Description

 

 

 

 

0

 

 

Striping without parity

 

 

 

 

1

 

 

Mirroring

 

 

 

 

0+1

 

 

Striping and mirroring

 

 

 

 

4

 

 

Striping with fixed parity drive

 

 

 

 

5

 

 

Striping with floating parity drive

 

 

 

 

JBOD

 

 

Just a Bunch of Drives

 

 

 

 

NOTE: The controller stripes data in multi-block chunk sizes. Also, the controller does not support RAID level 3 or 0 with a one-block chunk size.

There are some restrictions you must adhere to when creating a RAID set on the RAID 3000 pedestal. The minimum and maximum number of drives required to support each RAID level are listed in Table 2–4.

Table 2-4

Pedestal RAID Set Restrictions

RAID Level

 

Min. No.* of Drives

 

Max. No.* of Drives

 

 

 

 

 

JBOD

1

1

 

 

 

0

2

14

 

 

 

1

2

14

 

 

 

0+1

4

14

 

 

 

4

3

14

 

 

 

5

3

14

 

 

 

 

 

*Must be an even number.

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Compaq EK-SMCPO-UG. C01 manual RAID Levels Supported, Pedestal RAID Set Restrictions, Max. No. * of Drives