Leave the HBA in IT mode that way you can run FreeNAS and learn ZFS most value for SMBs. Boot from a SSD or USB when running tests makes switching OS easy. Grab a 2 or 3 cheep SSDs (Micro Center has good deals) and learn Proxmox, XCP-ng, FreeNAS, pf-Sense. Have a R-610 that I run evals on including Linux applications for client demos. I have both a flashed HBA and the H700 that came with the box.
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