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dm-crypt/Specialties#Discard/TRIM support for solid state drives (SSD)įor non-root filesystems, configure /etc/crypttab to include discard in the list of options for encrypted block devices located on an SSD (see dm-crypt/System configuration#crypttab).įor the root filesystem, follow the instructions from dm-crypt/Specialties#Discard/TRIM support for solid state drives (SSD) to add the right kernel parameter to the boot loader configuration.įollow the tips in Improving performance#Storage devices to maximize the performance of your drives.

Debian:SSDOptimization#Mounting SSD filesystems.

This may or may not improve performance on SSD storage but has security implications. Warning: The discard option allows discard requests to be passed through the encrypted block device. The latter is known as the continuous TRIM. Instead of issuing TRIM commands once in a while (by default once a week if using fstrim.timer), it is also possible to issue TRIM commands each time files are deleted instead. 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.

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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.

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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. Subsequent updates may yet change what updates are available and what combinations work, among other things, but the below list details all 580 elements featured in the game’s major August, 2017 update.This article covers special topics for operating solid state drives (SSDs) and other flash-memory based storage devices. Little Alchemy has been updated since its release, and the total available as of April of 2018 is 580. Complete Element and Ingredient Combination List for Little Alchemy