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The combination of RAID0 redundancy, an ext4 filesystem, a Linux 4.x kernel, and either Debian Linux or Arch Linux has been associated with data corruption.
El Reg reports EXT4 filesystem can EAT ALL YOUR DATA
Fixes are available, one explained by Lukas Czerner on the Linux Kernel Mailing List. That post suggests the bug is long-standing, possibly as far back as the 3.12-stable kernel. Others suggest the bug has only manifested in Linux 4.x.
[...] This patch for version 4.x and the patched Linux kernel 3.12.43 LTS both seem like sensible code to contemplate.
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Running an ext4 RAID0 with a Linux 4.x Kernel? Better Spray for Bugs
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(Score: 4, Interesting) by VLM on Tuesday May 26 2015, @07:28PM
Its nice for huge logs, both higher level stuff and packet sniffy at "system wide" levels not just monitoring one machine.
How often is this important, well, practically never. But its nice enough to have.
This rapidly runs into the ram limitation that WTF are you doing if you generate more than dozens of GB of raw data, and thats nice that you gathered it but now what do you propose to usefully do with it in a reasonable period of time? So I can build something bigger than I can find a productive use for it.
I always figured it would be useful for a really wide broadband SDR, no decimation, nothing just slam gigs/sec onto a drive for later analysis. That would work pretty well for RAID0.
You can also do stupid nerdy stunts. Floppy drives can't read fast enough to play mp3 files (most can't sustain more than 50K or so) and usually don't store enough data anyway, but if you take a thundering herd of them and plug like 8 external USB floppy drives into a pile of USB hubs and RAID0 them together then its sorta usable. Its not nearly as visually impressive but you can do similar "stupid raid tricks" with USB flash drives. Supposedly it takes "a lot" of parallel USB flash drives to record live video, at least back in the old days when they were slower access, maybe they're fast enough now.
If you ever get bored, and have a pile of USB flash drives or floppy drives, you can do all kinds of lunatic things with RAID. Its "hilarious" to set up a raid5 and then push the eject button of a floppy drive and then hot-add it back in. I guess on a rainy day I can be easily amused, but it seemed fun at the time.
A little google work shows I'm not the inventor of this fine idea, there's scant online reference to 127 usb floppy drive arrays out there. That would be a beautiful sight to behold.