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Does XFS run with the linux software RAID md driver?

April 26, 2017driver linux raid run Software XFS

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Does XFS run with the linux software RAID md driver?

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Yes – the current XFS tree contain everything you need to run XFS on top of any md RAID level. Note that write performance using XFS on top of software raid level 5 is bad using anything lower then 2.4.18. Using a external log device returns the performance to normal. You could solve this by making a seperate md raid 1 on the disks of about 50 MB and using the rest of the space for the raid 5 volume. In this scenario you will have normal performance. In kernels => 2.4.18 there are fixes which help performance a lot. Using a external log is still faster but the penalty is smaller.