[Facts] ZFS RAID-Z2 scrubbing speed

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8-core CPU Intel Xeon E5-2665 64 GB DDR3 ECC RAM OS FreeBSD 11.212x hdd’s RAID-Z2 (5400 rpm, SATA-2, consumer-grade) 2x ssd’s L2ARC (SATA-2, consumer-grade) 1x ssd SLOG (SATA-2, consumer-grade) pool specs: 81% full, 40% fragmentationscrub CPU-load: 60..75 % on all … Continued

[Facts] boot chain for UEFI and ZFS

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boot -chain example with UEFI (=sucessor of BIOS):   UEFI … the pc is powered on and the UEFI begins with self-test routines ↓ HDD (configured in UEFI) … UEFI boots from the configured device (e.g. “1st boot device = … Continued

[Test] ZFS scrub speed

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System:  Intel Avoton 2558 4-core CPU, 32 GB DDR3 ECC RAM, 6 disk RAID-Z2 (WD30EZRX) Info:   Scrubbing-speed is not constant, it raises after some time. it begins with 29,7 MB/s after 4 hours the average scrubbing-speed is 131 MB/s after … Continued