Adaptec 3405 User Guide - Page 39

Choosing a RAID Level, RAID 0 Non-redundant Array, RAID 1 Array, RAID 60, Array - configuring

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Page 39 highlights

Chapter 4: Getting Started ● 39 Choosing a RAID Level This section provides a brief overview of the RAID levels supported by your Adaptec RAID controller, including the minimum and maximum number of disk drives required by each. Note: Before you begin, familiarize yourself with your Adaptec controller's physical features and the RAID levels that it supports (see Standard RAID Controller Features on page 18). ● RAID 0 (Non-redundant Array)-Stripes data across multiple disk drives. Improved performance but no redundancy (see page 83). ● RAID 1 Array-Created from two disk drives where one disk drive is a mirror of the other (the same data is stored on each disk drive). Redundancy, but reduced capacity (see page 84). ● RAID 1E Array-Similar to a RAID 1 array except that data is mirrored and striped, and more disk drives can be included (see page 84). ● RAID 5 Array-Stripes data for improved performance and uses parity data to provide redundancy (see page 86). ● RAID 5EE Array-Similar to a RAID 5 array, but includes a distributed spare and must include a minimum of four disk drives (see page 87). ● RAID 10 Array-Built from two or more equal-sized RAID 1 arrays, stripes and mirrors data across multiple disk drives. Redundancy and improved performance (see page 85). ● RAID 50 Array-Built from multiple disk drives configured as two or more RAID 5 arrays, stripes stored data and parity data across all disk drives (see page 88). ● RAID 6 Array-Similar to a RAID 5 array except that it includes two independent sets of parity data instead of one (see page 89). ● RAID 60 Array-Similar to a RAID 50 array except that it includes four independent sets of parity data instead of two (see page 89). Use the table on page 90 to see how many disk drives you must connect to your RAID controller to support the RAID level you want.

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Chapter 4: Getting Started
●
39
Choosing a RAID Level
This section provides a brief overview of the RAID levels supported by your Adaptec RAID
controller, including the minimum and maximum number of disk drives required by each.
Note:
Before you begin, familiarize yourself with your Adaptec controller’s physical features
and the RAID levels that it supports (see
Standard RAID Controller Features
on page 18
).
●
RAID 0 (Non-redundant Array)
—Stripes data across multiple disk drives. Improved
performance but no redundancy (see
page 83
).
●
RAID 1 Array
—
Created from two disk drives where one disk drive is a
mirror
of the other
(the same data is stored on each disk drive). Redundancy, but reduced capacity (see
page 84
).
●
RAID 1E Array
—
Similar to a RAID 1 array except that data is mirrored
and
striped, and more
disk drives can be included (see
page 84
).
●
RAID 5 Array
—Stripes data for improved performance and uses
parity
data to provide
redundancy (see
page 86
).
●
RAID 5EE Array
—Similar to a RAID 5 array, but includes a distributed spare and must
include a minimum of four disk drives (see
page 87
).
●
RAID 10 Array
—Built from two or more equal-sized RAID 1 arrays, stripes and mirrors
data across multiple disk drives. Redundancy and improved performance (see
page 85
).
●
RAID 50 Array
—Built from multiple disk drives configured as two or more RAID 5
arrays, stripes stored data and parity data across all disk drives (see
page 88
).
●
RAID 6 Array
—Similar to a RAID 5 array except that it includes
two
independent sets of
parity data instead of one (see
page 89
).
●
RAID 60
Array
—Similar to a RAID 50 array except that it includes
four
independent sets
of parity data instead of two (see
page 89
).
Use the table on
page 90
to see how many disk drives you must connect to your RAID
controller to support the RAID level you want.