C
c3rberus
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We're upgrading our spinning disk storage array to an IBM StorWiz V7000 GEN3 that will be configured with 1.92TB 2.5In NVMe Flash Drives. Traditionally I kept with Progress recommendations of RAID-10 on the storage array, best performance yield out of my 15K disks. We're moving from a spinning disk array onto the NVMe SSD space, does the recommendation of RAID-10 on NVMe SSDs apply? I ask because IBM is pushing DRAID-6 as the next best thing, this is their distributed RAID; so you won't have a dedicated spare disk instead you have blocks allocated within each disk that is part of the RAID group, so things like a RAID rebuild operation is much faster, etc. I do like the features gained by going with IBM's recommendation of DRAID-6. Based on this Progress KB it sounds like RAID-10 is still the recommended option even if the underlying disks are SSD ( and that article was updated in 2018 ). Just wondering what RAID configuration you guys are deploying out there if the storage system is all flash NVMe array? 20x1.92TB NVMe SSD RAID10 = 20x read and 10x write speed gain (at least 1-drive failure) RAID6 = 18x read speed, no write speed gain (2-drive failure) If I went RAID6 route, I could reduce the number of drives needed for the same amount of space, thus reducing cost...
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