January 19, 201610 yr Intel i7 4790k 16GB Ram Samsung EVO 500GB SSD Samsung m.2 240GB SSD 2X WD Black 1TB Drives and an array of WD green 2 and 3TB data drives + parity. I am primarily doing this because I travel often and am unable to view my media on plex when on the road due to transcoding. It is currently in a old AMD quad-core Supermico server box. (for sale soon) I was thinking that I would set up Plex server app. library and transcode on the Samsung SSD. Is that the right idea? I also dont know what to do with the dual WD Blacks? one is currently cache, I heard there is now dual cache. whats the best setup with the hardware? Thanks in advance to the community!
January 19, 201610 yr Couple of questions for you... do you want to cache writes to the array, or are you just looking to use the cache drive as an application drive for Plex, etc.? Are you considering using both a cache drive and one outside the array via Unassigned Devices, or just a cache drive?
January 19, 201610 yr Author I don't have a preference, really whichever is the most sound and bulletproof application of hardware. If that means i have one of the WD blacks as a backup thats fine, or if i dont use both the m.2 and the SSD..
January 19, 201610 yr I consider the speed of writing directly to the array adequate so I don't use a cache drive to cache writes to the array - I like that writes are immediately protected by Parity. That leaves your cache drive to function primarily as an application drive for Dockers, etc. If you use XFS then you are limited to one device - take your pick but using an SSD is typical. If you take this approach it is common to setup a script to stop all your dockers and back them up to the array daily. If you use BTRFS you can setup a pool of cache devices which has some redundancy built in. BTRFS was perceived as a bit immature in the early days of unRAID 6 but I haven't heard any concerns lately. It's worth looking into.
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