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Global Mossaderator
I would recommend using a hardware RAID controller for duplicating your OS with RAID 1.
With a hardware controller you have these benefits:
- OS doesn't know about the underlying disks including boot partition.
- You can remove one disk and still boot up (in theory you could do this with MD raid in Linux, but not Windows).
- Independent from motherboard (fakeRAID e.g. Intel Rapid Storage Technology)
- Less problems after BIOS reset e.g. from (fake)RAID mode back to AHCI.
Cons:
- Checking the disk health with SMART could be different per (controller) vendor.
- More expensive than fakeRAID (motherboard).
- You need a SAS SFF to SATA cable.
For data storage software raid is the easier, cheaper and you have a lot of options under Linux e.g. MD, BTRFS or OpenZFS.
And yes, you need the same size disks (i think it uses the smallest size).
(For HDDs: don't buy SMR (Shingled) hard disks.)
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kung foo man (16th July 2023)
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