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I have a raid 5 array that I'd like to cache. It already contains data (including OS - ubuntu 14.04). Is it possible to create a new flashcache volume without destroying the data?

It seems like flashcache_create man page doesn't mention this.

Barnaba
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Yes, it's designed that way.

That's in my opinion the main advantage of flashcache and enhanceIO (see also: What are the advantages/disadvantages of different SSD to HDD cacheing options (dm-cache, flashcashe...)?)

I would still make a backup before the operation, just in case.

Community
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Olivier
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