Choosing A Raid Level - Adaptec 3405 Installation And User Manual

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
RAID 0 (Non-redundant Array)—Stripes data across multiple disk drives. Improved
●
performance but no redundancy (see
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
RAID 1E Array—Similar to a RAID 1 array except that data is mirrored and striped, and more
●
disk drives can be included (see
RAID 5 Array—Stripes data for improved performance and uses parity data to provide
●
redundancy (see
RAID 5EE Array—Similar to a RAID 5 array, but includes a distributed spare and must
●
include a minimum of four disk drives (see
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
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
RAID 6 Array—Similar to a RAID 5 array except that it includes two independent sets of
●
parity data instead of one (see
RAID 60 Array—Similar to a RAID 50 array except that it includes four independent sets
●
of parity data instead of two (see
Use the table on
controller to support the RAID level you want.
Standard RAID Controller Features on page
page
page 84).
page 86).
page 89).
page 89).
page 90 to see how many disk drives you must connect to your RAID
Chapter 4: Getting Started
83).
page 87).
page
39
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18).
page 84).
page 85).
88).