Re: RAID 5 Question

Andy Kent (akent@cix.compulink.co.uk) wrote: : > We are currently evaluating and testing Online 5.0 on a RAID 5 box from : > Storage Concepts and are seeking recomendations on the feasibility of : > this configuration. : All of my experiences of OnLine on RAID have been disastrous, and in : spite of copious numbers of provocative postings over several months both : here and in the HP conf (HP are big pushers of RAID), I have yet to : receive one single response that says a kind word about it. : RAID cuts across the grain of the very way OnLine was designed to work : best, ie give OnLine the maximum number of separate, raw disks. Start : messing about with that and you can really slaughter performance. : Don't do OnLine on RAID kids. : akent@cix.compulink.co.uk (Andy Kent) : ------------------------------------- RAID should not be thought of as a performance solution but rather a reliability solution. In all cases that I know about, a mirrored non-RAID set of disks will offer a superior performance (and reliability) solution vs. RAID. I never recommend RAID drives unless the configuration is so large as to prohibit a non-RAID solution ( generally larger than 250Gb ).