It has an lbads (LBA data size) of 9, which means sectors are 2 9 or 512 bytes.
The list of formats is at the end of the output. Nlbaf is the number of LBA formats minus 1, so here there is only one format supported. To see whether a given NVMe device supports this, use the Identify Namespace command. Because they report as 512 byte devices, filesystems cannot automatically optimise for the native sector size and this must be manually specified when creating a filesystem to avoid suboptimal performance.Īs an alternative to manually overriding the autodetected sector size, some SSDs can have their sector size changed during formatting, so that they report a number closer to their true sector size. Most SSDs report their sector size as 512 bytes, even though they use larger sectors - typically 4 kB, 8 kB, or sometimes larger. There is also Solid state drive/NVMe#Sector size. See the following table for an indicative overview:įstrim is supported since kernel 5.13, įstrim is supported since kernel 4.19, A TechSpot article shows performance benchmark examples of before and after filling an SSD with data.Īs of Linux kernel version 3.8 onwards, support for TRIM was continually added for the different filesystems.
Most SSDs support the ATA_TRIM command for sustained long-term performance and wear-leveling.
