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https://forums.freebsd.org/threads/zfs-with-4k-sectors.70795/
May 17, 2019 · Hello. Is it good idea to use ZFS with 4K sectors if the system is with 512-byte sector HDD and no SSD? I guess some disk space will be lost because of larger sectors but don't know whether small sectors (512) will waste more RAM or other resources.
http://daemon-notes.com/articles/system/advanced-format
First, create a 4k-aligned GPT partition with the type freebsd-ufs (labeled data0 in this example). Then create an UFS filesystem on it using -S (sector size) parameter: # newfs -U -L data0 -S 4096 /dev/gpt/data0 ZFS pools and filesystems. If you want to check what is the sector size run: > …
http://www.ivoras.net/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html
Sat 01 January 2011 By Ivan Voras. In Misc.. tags: FreeBSD ZFS UFS All major FreeBSD filesystems support 4K sectors (UFS, ZFS, ext2), and so does the lower level - GEOM - but currently there's an issue of communicating this configuration between all the layers.
https://en.wikipedia.org/wiki/4Kn
Figure 3 In 2010, industry standards for the first official generation of long data sectors using a configuration of 4096 bytes per sector, or 4K, were completed. All hard drive manufacturers committed to shipping new hard drive platforms for desktop and notebook products with the Advanced Format sector formatting by January 2011.4K native (4Kn): 4K physical sectors on the drive media and 4K configuration reported to the host
https://www.freebsd.org/doc/handbook/bsdinstall-partitioning.html
Support for automatic creation of root-on-ZFS installations was added in FreeBSD 10.0-RELEASE. This partitioning mode only works with whole disks and will erase the contents of the entire disk. The installer will automatically create partitions aligned to 4k boundaries and force ZFS to use 4k sectors. This is safe even with 512 byte sector ...
https://www.ixsystems.com/blog/freenas-9-2-0-release/
Dec 22, 2013 · USB 3.0 support, create a Tunable named xhci_load, set its value to YES, and reboot the system. The Kernel UMA allocator is now the default for ZFS. This results in higher ZFS performance. ZFS will now alert the administrator for pools that are not 4K-aligned. By default, FreeNAS will treat all disks as 4K sector (“Advanced Format”) disks.
https://reviews.freebsd.org/D566?id=1008
Aug 08, 2014 · Previously there was no way to force a ZFS to directly create a zpool with a minimum 4k sector size. To achieve this we used gnop to overlay a device With a 4k sector size which fools ZFS into creating the pool with larger than logical sector sizes. ... smh retitled this revision from to Switch zfsboot installer force 4k option to use vfs.zfs ...
https://docs.freebsd.org/doc/10.2-RELEASE/usr/local/share/doc/freebsd/zh_TW.UTF-8/books/handbook/bsdinstall-partitioning.html
Support for automatic creation of root-on-ZFS installations was added in FreeBSD 10.0-RELEASE. This partitioning mode only works with whole disks and will erase the contents of the entire disk. The installer will automatically create partitions aligned to 4k boundaries and force ZFS to use 4k sectors. This is safe even with 512 byte sector ...
https://www.reddit.com/r/freebsd/comments/2x94qd/installing_freebsd_101_on_ssd/
I'm wondering: When installing FreeBSD 10.1 to an SSD, does the installer align to 4K and/or recognize it's installing to an SSD and optimize the OS for the SSD? Or, am I much better off doing something like this, where I have to manually partition everything, enable trim and all that?
https://unix.stackexchange.com/questions/353779/how-to-format-mount-a-large-partition-with-4k-sector-size-in-freebsd
How to format & mount a large partition with 4k sector size in Freebsd? Ask Question Asked 2 years, ... Do I need to handle a 4k sector size hard disk differently? Today I was able to format the drive with msdosfs : ... BSD kernel 10.1 version so I am not expecting missing file system support issue.
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