Do not underestimate a software RAID.
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Software RAID would typically provide the same, if not better reliability than an entry-level server hardware RAID controller.
Certainly, a software RAID implemented over motherboard's ATA ports would be noticeably more reliable than a setup involving
a $20 FakeRAID card from a corner store.
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Software RAID is easier to move around from server to server.
It does not require an identical replacement controller in case
of a controller failure, which is sometimes a hindrance with server hardware.
Just remember to always move the disks together.
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In RAID 0, RAID 1, and RAID 10, the hardware RAID controller does not provide
any computational power benefit because there is nothing to offload.
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Most modern SOHO and small business NAS devices, like Synology, QNAP, or NetGear,
use a software RAID (Linux/mdadm).
The significant side effect is that you cannot reliably boot from a software RAID.
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