RE: Raid 5

Danny Wright wrote > > Someone's trying to sell us on RAID 5 and I haven't reviewed > Art's objections lately. > > They're saying all our concerns are no longer valid. > > > Agree or disagree? > Ask them what performance advantages has RAID 5 got over RAID 10. The answer - NONE No matter how big the cache I do not believe RAID 5 can beat RAID 10 in any way, and the cache works just as well with RAID 10 The key word here is SELL. Ask them why you cannot have RAID 10. Yes it costs more, but the additional cost is a low proportion of the overall hardware and the extra reliability you get against multiple drive failures is worth the extra cost. When management query the extra cost tell them the data is obviously more important to you than to them or the salesperson. Ask the salesperson if they give a guarantee against multiple drive failures in the same raid set. Colin Bull ======================================================================= This email may contain confidential and privileged information and is intended for the named or authorised recipients only. If you are not the named or authorised recipient of this email, please note that any copying, distribution, disclosure or use of its contents is strictly prohibited. If you have received this email in error please notify the sender immediately and then destroy it. The views expressed in this email are not necessarily those held by VNL, and VNL does not accept any liability for any action taken in reliance on the contents of this message. VNL does not guarantee that the integrity of this email has been maintained, nor that it is free of viruses, interceptions or interference. _______________________________________________________________________ This email has been scanned for all known viruses by the MessageLabs Email Security System. _______________________________________________________________________