newfs TRIM flag device support
- Reply: Mark Millard : "Re: newfs TRIM flag device support"
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Date: Fri, 16 Feb 2024 03:19:00 UTC
Hi, I'm reading the newfs manual https://man.freebsd.org/cgi/man.cgi?newfs(8) to be able to know about the TRIM flag. In the manual under -t parameter, it mentioned about "underlying device support", what exactly is this device? Is it the host (for example, Raspberry Pi SD/eMMC host reader) or the SD/eMMC card (controller) or both? -t Turn on the TRIM enable flag. If enabled, and if the underly- ing device supports the BIO_DELETE command, the file system will send a delete request to the underlying device for each freed block. The trim enable flag is typically set for flash- memory devices to reduce write amplification which reduces wear on write-limited flash-memory and often improves long-term per- formance. Thinly provisioned storage also benefits by return- ing unused blocks to the global pool. BR, orbit