B-4Adaptec Storage Manager Pro for DuraStor User’s GuideArray Selection ExamplesThe examples in this section show you how to use the arrayselection criteria to determine the optimum array type for specificserver environments. You may find these examples useful indetermining the array type that best meets your needs. SeeUnderstanding the Array Selection Criteria on page B-7.Generally, most users who require fault tolerance prefer RAID 5configurations because of the reduced cost of overhead. Users whodo not require fault tolerance usually use the stripe set.Need orSystem Use Definition Suggested ConfigurationMission-critical dataUsers must have access todata, and fault tolerance isthe highest priority. Stripe set of mirrorsets (RAID 0/1) Stripe set of RAID 5sets (RAID 0/5) Mirror set (RAID 1) RAID 5 setApplicationserverUsers access applicationsfrom the server, but theystore their data on their localdisk drives; requires highsequential-readperformance. Stripe set of mirrorsets (RAID 0/1) Mirror set (RAID 1) Stripe set of RAID 5sets (RAID 0/5) RAID 5 setBatchapplicationsUsers process large filessequentially. RAID 3 setDeveloperenvironmentUsers access data from theserver, modify the data, andreturn it to the server;requires high random-readand -write performance andfault tolerance. Stripe set of RAID 5sets (RAID 0/5) Mirror set (RAID 1) RAID 5 setInquiryprocessingUsers need redundancy, butrarely need write capability,such as with group officeautomation and onlinecustomer servicedepartments. RAID 5 set
