To change the periodicity of the timer or the command run, edit the provided unit files. To query the units activity and status, see journalctl. Therefore there is no need to worry about too frequent invocations, in an anacron-like fashion. The timer relies on the timestamp of /var/lib/systemd/timers/stamp-fstrim.timer (which it will create upon first invocation) to know whether a week has elapsed since it last ran. The service executes fstrim(8) on all mounted filesystems on devices that support the discard operation. Enabling the timer will activate the service weekly. The util-linux package provides rvice and fstrim.timer systemd unit files. hdparm does however not support NVMe SSDs. Non-zero values indicate TRIM support.įor SATA SSDs only, the hdparm package can detect TRIM support via hdparm -I /dev/sda | grep TRIM as the root user. Data loss can occur otherwise!Īnd check the values of DISC-GRAN (discard granularity) and DISC-MAX (discard max bytes) columns. Warning: Users need to be certain that their SSD supports TRIM before attempting to use it.
#SSD HEALTH LINUX DRIVER#
NTFS-3G driver only supports periodic TRIM.įstrim is supported since kernel 4.19, Ntfs3 kernel driver only supports continuous TRIM. See the following table for an indicative overview:Īsynchronous discard is enabled by default since kernel 6.2.įstrim is supported since kernel 5.13, Īs of Linux kernel version 3.8 onwards, support for TRIM was continually added for the different filesystems. For example, Ubuntu enables periodic TRIM by default, Debian does not recommend using continuous TRIM and Red Hat recommends using periodic TRIM over using continuous TRIM if feasible. Continuous TRIM is not the most preferred way to issue TRIM commands among the Linux community.
Note: If you want to use TRIM, use either periodic TRIM or continuous TRIM. Without the NVMe DEALLOCATE, SAS UNMAP or ATA_TRIM command (supported by most SSDs), the disk controller takes more time to do a write operation as soon as there is no empty memory blocks, as it has to shuffle data around to erase a cell before writing to it (see Wikipedia:Write amplification): a TechSpot benchmark shows the performance impact before and after filling an SSD with data.
Since the flash cells they are made of are worn out a little with each write operation, the disk controllers use algorithms to share the write operations on all the cells: this process is called wear leveling.
#SSD HEALTH LINUX FREE#
If you want to partition an SSD for a specific purpose, it may be useful to consider the List of file systems optimized for flash memory.įor general usage, simply choose your preferred filesystem and enable #TRIM.Ĭompared to hard drives, where deleting a file is only handled at the file system level, SSDs benefit from informing the disk controller when blocks of memory are free to be reused. This article covers special topics for operating solid state drives (SSDs) and other flash-memory based storage devices.
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