I know how RAID work and prevent data lost from disks failures. I want to know is possible way/how easy to recover data from unfunctioned remaining RAID disks due to RAID controller failure or whole system failure. Can I even simply attach one of the RAID 1 disk to the desktop system and read as simple as USB disk? I know getting data from the other RAID types won’t be that simple but is there a way without building the whole RAID system again. Thanks.

Possibly linux
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920d

You really do not want hardware raid. You want software raid like LVM or better yet, ZFS.

Do your own research. Keep in mind raid isn’t a backup. It is only for convenience.

@NotSpez@lemmy.world
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-319d

If op is considering ZFS: Do. Not. Use. RAIDz. (learned the hard way)

Possibly linux
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419d

Why wouldn’t you? It is the most flexible out if all of them.

@NotSpez@lemmy.world
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-219d

In my experience, using spinning disks, the performance is very poor, and times for scrub and resilver are very long. For example, in a raidz1 with 4x8TB, scrubbing takes 2-3 weeks and resilvering takes almost 2 months. I must also add very poor performance in degraded state. This is a very old post, but things are still the same.

@Zeoic@lemmy.world
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218d

You must have shingled/SMR drives. They do not work well with any type of raid array.

My array of 7x12TB drives resilvers in a few hours, as I made sure I got CMR drives

@NotSpez@lemmy.world
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217d

That makes total sense. Thanks!

Possibly linux
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419d

I’ve not had that experience

@renzev@lemmy.world
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419d

A lot of “hardware raid” is just a separate controller doing software raid. I thought I lost access to a bunch of data when my raid controller died, before I realized that I could just plug the disks directly into the computer and mount them with mdadm. But yes, hardware raid seems a bit pointless nowadays.

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