[Howto] solve FreeBSD “zfs: out of temporary buffer space”

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system: FreeBSD v13.0-p7 reason: the bootloader is broken (e.g. after update)solution: reinstall the bootloader(s) to your boot disk(s) example: zroot (2-disk zfs-mirror with GPT partition tables) download a bootable FreeBSD-Image(e.g. FreeBSD-13.0-RELEASE-amd64-memstick.img) copy the image-file to a USB-stick (attention: all data … Continued

[Howto] FreeBSD v12 and TP-Link TL-WN725N WLAN-Stick

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OS: FreeBSD 12.0-RELEASE-p4 amd64 WLAN hardware: TP-Link TL-WN725N (builtin REALTEK RTL8188EU chipset) insert the USB WLAN-stick to your computer check, if the kernel recognizes the usb-stick: dmesg and check the output load the corresponding kernel-modules: kldload rtwn.ko and kldload if_rtwn_usb.ko … Continued

[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

[Howto] solve freebsd-update invalid signature error

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check, if you have a working /usr/bin/openssl /usr/bin/openssl version file /usr/bin/openssl ldd /usr/bin/openssl   check, if you have a valid signature-file for freebsd-update /var/db/freebsd-update/pub.ssl (you can safely remove it, because a new run of freebsd-update fetches it again)   After … Continued

[Howto] read the search-path for building-tools (cpp, gcc, ld)

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  c-preprocessor (GNU cpp) environment-variable: $CPATH #cpp -v /usr/include   compiler (GNU cc) environment-variable: $CPATH #gcc -E -Wp,-v – /usr/include   linker (GNU ld) environment-variable: $LIBRARY_PATH #ld –verbose | grep -i ‘search_dir’ SEARCH_DIR(“/lib”); SEARCH_DIR(“/usr/lib”); SEARCH_DIR(“/usr/local/lib”)