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A comment on Linus: Don't Use ZFS. Parent comment

Re:Linus: Don't Use ZFS by vetinari on Friday January 10, 2020 @07:54AM (#22010584)
Synology uses standard linux md (for btrfs too). Even SHR (Synology Hybrid RAID) is just different partitions on the drive allocated to different volumes, so you can use mixed-capacity drives effectively.
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Re:Linus: Don't Use ZFS by kalleboo on Friday January 10, 2020 @09:18PM (#22017613)
Right, instead of BTRFS RAID5/6, they use Linux md raid, but I believe they have custom patches to BTRFS to "punch through" information from md, so that when BTRFS has a checksum mismatch it can use the md raid mirror disk for repair.
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