Running A Btrfs RAID Array Across Four USB 3.0 Flash Drives

Written by Michael Larabel in Storage on 17 August 2015 at 11:40 AM EDT. Page 1 of 3. 13 Comments.

My benchmarking entertainment this weekend, besides getting to benchmark with a sledgehammer, was testing out Btrfs RAID 0/1/5/6/10 arrays across a set of four USB 3.0 flash drives.

Earlier this month there was an online deal for four Lexar 16GB JumpDrive S33 USB 3.0 flash/thumb drives for just $20 USD... While flash drives are always useful with most modern BSD/Linux distributions supporting USB-based installations, I decided first up to have fun with them by putting them into a Btrfs RAID array.

Using the Btrfs built-in RAID capabilities, I tried the available RAID options across these four Lexar USB drives while testing from the Linux 4.2 Git kernel to have the newest Btrfs support. I really wouldn't recommend running a RAID array across a set of cheap, consumer-level flash drives, but I did namely out of fun and curiosity sake.

Flash Drive Btrfs RAUD File-System Test

All of the benchmarks were handled via the Phoronix Test Suite. For real-world testing of Btrfs RAID capabilities, see the many other Btrfs RAID tests.

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