"Debian 12 Bookworm Minimal Install w/BTRFS " by JustAGuy Linux at 8:28 he sets an option for ssd,
mount -o ... ssd ...
What is the option
ssd? When should it be used, and when should it not be used? I don't see it documented in
man mount. But I did find it online, https://btrfs.readthedocs.io/en/latest/btrfs-man5.html
Since 4.14, the block layout optimizations have been dropped. This used to help with first generations of SSD devices. Their FTL (flash translation layer) was not effective and the optimization was supposed to improve the wear by better aligning blocks. This is no longer true with modern SSD devices and the optimization had no real benefit. Furthermore it caused increased fragmentation. The layout tuning has been kept intact for the option ssd_spread.
Without the "block layout optimizations" what else does the ssd option do to "control SSD allocation schemes"?