Watching Synology drive expansions take up to 8 hours per drive, I like to err on the side of caution with these arrays. The real question to ask with RAID 5 implementations is how long it takes for the RAID controller to rebuild the array if another drive fails during the rebuilt, the whole data set is toast. But so far, no issues with the Drobo either.Īnd why 2 disks? Most RAID implementations, even on that new Mac Pro internal, are RAID 5. I suppose if/when SoftRAID comes out with RAID 6 (which also allows for two disks to fail), I’ll reevaluate. I had a lot of unused 4TB drives hanging around that I wanted to use, and Drobo – for all its well documented faults, including proprietary data structures – is the only DAS I could find that lets you replace a two failing disks with new ones, as well as allow for different sized disks (I understand some very pricy QNAP boxes do the same, but having already tried wrapping my brain around Synology’s OS, I wasn’t up for the price or the time to figure out QNAP’s version). Oh, and I bought a Drobo too … though I don’t entirely trust it.
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