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How critical is not having down time? Raid 1 - full mirror - Can loose multiple drives in and still be running if you do not loose both drive that are mirrored together. Raid 5 - 3+ drives utilizing % of each drive to stripe data from other drives. Loosing more than one in a raid set causes loss of all data in that set. Mirrored Raid 5 - The best of both worlds and your data is most available. Still loosing multiple drive in each of the mirrored Raid 5 sets will cause you to loose all the data in that Raid 5 array.. Mirrored system - complete redundancy of server. Should also have redundant backplanes in redundant building in redundant locations. Why depends on how critical the application is and amount of down time and/or data loss management will tolerate. Cost vs. Benefit. Chris Bipes Information Services Director CrossCheck, Inc. -----Original Message----- Would you choose: 1. RAID 1 2. RAID 5 3. Other Why? Primary use will be web application serving and a WDSC workstation. While they're not entirely compatible workloads, if the WDSC environment is used for host editing and web testing, it will have a similar profile to a web application server.
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