Choosing A Raid Level - Adaptec RAID 3085 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.
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
1
RAID 50
●
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
1
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.
1
The Adaptec 2420SA RAID ccontroller does not support RAID 50.
page 77).
page 79).
Array—Built from multiple disk drives configured as two or more RAID 5
page 82).
page
page 83 to see how many disk drives you must connect to your RAID
Chapter 4: Getting Started
page 76).
page 80).
82).
31
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page 77).
page 78).
page 81).