Iciclebar Posted December 27, 2018 Share Posted December 27, 2018 (edited) Hello, Is there any requirement or best practices to keep cache drives all the same model / speed or can you just mix and match and what are the benefits / downsides. I just picked up a 4x m.2 x16 card for my asrock rack board. I'm currently using 2x 960 evo 250GB drives as a cache pool for docker storage. I've got a 500gb 960 evo passed through for a VM. I was thinking of adding a 2nd 500 giving me a total of 750GB in the cache pool. Should I find another 960 Evo or can I just throw a 970 in there and call it a day? Will that cause any problems? Also, what I noticed is that my disk performance for VDisks hosted on my cache pool improved dramatically when I switched it to a brtfs cache pool rather than a single xfs drive and I'm thinking about setting my VMs up with virtual disks hosted on the NVME pool rather than directly passing them through. Any thoughts? What happens if I added SATA ssd's to the cache pool alongside the nvme drives, would the cache pool be as slow as the slowest member or will it use all available space without penalizing the data on the NVME drives? Thanks. Edited December 27, 2018 by Iciclebar Quote Link to comment
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