A-6Adaptec Storage Manager Pro User’s GuideArray TypesThe following are the most common types of arrays (each isdescribed in more detail in the sections that follow):Array Type Strengths WeaknessesVolume Set •Low cost •No data protection•Low performanceStripe set(RAID 0)•Highest performance•Supports multiplesimultaneous read andwrite operations.•No data protection; ifone drive fails, all datais lost.Mirror set(RAID 1)•Very high performance•Very high data protection•High cost forredundancy overhead,because twice thestorage capacity isrequired.RAID 5 set •Lower cost•Very high readperformance•Very high data protection•Supports multiplesimultaneous read andwrite operations.•Can be optimized for large,sequential requests.•Write performance isslower than a stripe set(RAID 0) or mirror set(RAID 1).Stripe set ofmirror sets(RAID 0/1)•Very high performance•Highest data protection;can tolerate some cases ofmultiple drive failures.•High redundancyoverhead, becausetwice the storagecapacity is required.Requires a minimum offour drives.Stripe set ofRAID 5 sets(RAID 0/5)•Lower cost•Higher performance•Very high readperformance•Very high data protection•Supports multiplesimultaneous read andwrite operations.•Can be optimized for large,sequential requests.•High redundancyoverhead, becausetwice the storagecapacity is required.Requires a minimum offour drives.
