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Tiered storage? Advice on implementing fast SAS drives to existing SATA array

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I've got eight 10K 1.2TB SAS drives for free from work. Are there some advices or best practices on how to implement faster than normal 7.2K SATA drives? My primary usecase is Plex, nextcloud and 2 VM's. I've looked at setting up another cache pool consisting of all the SAS drives as my logic states that the newest Linux distros moves from 2TB tier 1 NVME cache -> 9.6TB tier 2 SAS -> tier 3 38TB SATA (array) but i'm not sure if thats even possible. Any advice? 

 

Setup:

i5-11500

32GB 3200MHz

Cache: 2x SN550 1 TB NVME

Array: 1x 18TB, 1X 16TB, 1x 8TB, 2X 4TB = 38TB (all 7.2K 6G SATA)    

 

8000\15000 Linux distros

These drives are almost certaintly going to actually be slower than your big modern drives, while drawing lots of power... check how they perform while unassigned but it's likely you won't want to use them.

Edited by Kilrah

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