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I have successfully created a fusion drive using an 256GB Samsung 840 Pro and am loving it - but am experiencing (my first) system crashes (on my mac) ever since when I send my MBP to sleep. I read that upgrading the firmware of the SSD might help and found this description to do it: https://discussions.apple.com/thread/4863343.

I depend on my machine being in a working state every day, so I need to be sure that the firmware upgrade will not destroy my file system (DXM05B0Q from http://www.samsung.com/global/business/semiconductor/samsungssd/downloads.html).

Samsung states that upgrading the firmware will not work on devices being part of a RAID - does this also apply to Fusion Drives? Has anyone ever applied this firmware upgrade to a SSD that was part of a fusion drive successfully without need to rebuild it?

I know that applying a firmware upgrade bears risks of completely losing the device and of course I have created a full backup for the case…

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