Are there any USB flash drives or SD cards which use RAID or redundant storage for additional reliability?

I'm looking to get a fault-tolerant USB flash drive, which saves data to multiple independent locations, whether using RAID or some other means to back up data. Has a product like this ever been created, or are my only options to hack something together?

(By the way: I'm aware that RAID doesn't prevent data corruption from software or the file system. I'm just looking for something that can handle one of the memory sticks going dead.)

Solution 1:

There are USB to SATA HD enclosures that support more than one drive and can do basic RAID. One example is the BYTECC BT-M252U3 which is USB3 and supports two SATA 2.5" drives (HD or SSD) with the main drawbacks being it looks to require external power and is much bigger than a USB thumb drive. Still since it uses 2.5" drives it's pretty small and if using a USB3 port and SSDs it might not need the external power adapter.

Solution 2:

I've never seen a raided flash drive for sale as one unit. I have seen a demo where someone built a redundant ZFS pool on flash drives. ZFS can rebuild the pool even if the device paths completely change or even if you don't have all of them. I don't know how practical it is as it was meant only to show how zfs works.

Solution 3:

Addonics has a Dual CF - SATA HDD Adapter you could use (AD2SAHDCF - $24.95). It has a RAID 1 mode. If you wanted USB, just use any 2.5" USB-SATA enclosure.