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Thoughts on these SATA/M.2-->SATA/2.5" adapters? (feddit.nl)

submitted 6 months ago by [email protected] to c/[email protected]

51 comments fedilink hide all child comments

Trying to squeeze some more storage in my MiniPC. I have questions about these. These use hardward RAID with selectable modes (Individual/JBOD/RAID1/RAID2).

If I use RAID 1 and one of the drives fails, will I know?
If a drive fails, and a slap in a new one, will it internally begin repairing RAID 1 again?
Can I use these as "individual" or JBOD and have 2 separate drives through the same connector, and use something like TrueNAS to software-RAID them?

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[+] [email protected] 2 points 6 months ago* (last edited 6 days ago) (7 children)

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[–] [email protected] 8 points 6 months ago (5 children)

As in, hardware RAID is a terrible idea and should never be used. Ever.

With hardware RAID, you are moving your single point of failure from your drive to your RAID controller - when the controller fails, and they fail more often then you would expect - you are fucked, your data is gone, nice try, play again some time. In theory you could swap the controller out, but in practice it's a coin flip if that will actually work unless you can find exactly the same model controller with exactly the same firmware manufactured in the same production line while the moon was in the same phase and even then your odds are still only 2 in 3.

Do yourself a favour, look at an external disk shelf/DAS/drive enclosure that connects over SAS and do RAID in software. Hardware RAID made sense when CPUs were hewn from granite and had clock rates measures in tens of megahertz so offloading things to dedicated silicon made things faster, but that's not been the case this century.