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got a confirmation from samsung that 860 PRO uses 512 as a physical sector size. and they'll send me a list of disks that are actually 4Kn. don't know how much it will actually affect my user's experience, but since i have time to optimize new proxmox server as much as possible, every little...

Interesting.. as they are running fine on another production server and I have not seen the same degradation levels as you have.. Unless your usage is crazy.. But for the ones you use for slog and l2arc, are they also showing 512 as a sector size ?

hi all, I'm testing a new server for proxmox (zfs) and have 4x samsung 860PRO 512GB SSDs there. all the documentation i found seem to say those disks have 4k physical block size. yet all the tools (fdisk, hdparm, parted, stat etc..) report 512 for both physical and logical. maybe some has...