SSD TRIM in NetBSD HEAD (-current).
Solid state drives are complicated. TRIM is an operation in the SATA command set that can be used to mark specific blocks of a SSD unused, which helps the SSD retain good performance when large amounts of data have been deleted. It requires operating system support. macOS actually didn't support TRIM for quite a long time, so there's at least some drives available in the wild that cope well with not being regularly TRIMed. NetBSD 7.0 added a fdiscard system call, which allows portions of a device or file to be TRIMed...
https://www.unitedbsd.com/d/859-ssd-trim-in-netbsd-head-current
#hdd #fdiscard #trim
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