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I don't know in general but in your particular case you can't reshape because mdadm can't fit the size of your RAID10 device in any RAID1 device built from your disks. Let's say that your SSDs are 100GB each. This means that your RAID10 device has a size of 200GB (your data maybe a lot less but note that mdadm works on a device level not filesystem level). ...


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Actually, RAID10 is the preferred RAID level for high-performance virtual machines. While it has its shortcoming, I can not see why it should not be used with ESXi or Docker. Back to original question: docker mainly is a user-space affaire. So it can not corrupt a software or hardware RAID device. As a side note, I strongly advise you against cheap RAID ...


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All software running on the machine operates as if the RAID is 1 device.. This is why usually the device is /dev/sdc instead of seeing /dev/sda and then also /dev/sdb. If you're using a software RAID vs a RAID card then it's plausible that something on the OS could cause the OS injected RAID to not behave properly. I know people use them all the time but ...


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LXC/Docker by design doesn't have anything to do with RAID (any RAID) at all. Docker/LXC containers are run on the same kernel as the host. As such I don't think there are any docker related problems.


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The main advantage of hardware RAID is the protected write back cache which will boost performance when dealing with synchronized writes (eg: databases). Your should absolutely avoid RAID cards without protected write back cache, as they often are much slower than software RAID. At the same time, not all RAID controllers play well with SSDs. The main reason ...


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Linux software RAID (md) supports passing discard ops down to its components. When those components are SATA devices, they turn into ATA TRIM commands. See for example: Implementing Linux fstrim on SSD with software md-raid Depending on your access pattern, 2x SSDs concatenated could be as fast as RAID0. e.g. random IO scattered across the entire disk ...


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With SSD's the only generic recommendation is to buy the right drive for your workload. See this answer for the rationale. The warranty for the Samsung SSD 850 Pro may be ten years, but that covers mechanical failures and does not cover you when you exceed the still "somewhat limited" total write capacity limit. Associated with the failure rates and ...


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4xSSD(512Gig) in a RAID10 you have redundancy (+) you have only 1TB of usable space (-) you have x2 speed (+) 2xSSD(1Tb) no redundancy (-) you have 2TB of usable space (+) you have normal speed (N) 2xSSD(1Tb) RAID0 no redundancy (-) you have 2TB of usable space (+) you have x2 speed (+) As for the lifetime of them, that model is pretty good, ...



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